Article
Construction & Building Technology
Tvrtko Renic, Tomislav Kisicek
Summary: Concrete beams reinforced with FRP rebars offer greater durability compared to steel reinforced elements, but the main drawback lies in the low ductility of FRP rebars. Various methods for enhancing the ductility of concrete elements are explored in this paper, with a focus on the theoretical effects of confining the compressive area of concrete. Additional experimental research is needed to validate the theoretical analysis and improve the ductility of FRP-reinforced concrete beams.
Article
Engineering, Civil
Ahmed H. Ali, Hamdy M. Mohamed, Brahim Benmokrane
Summary: This study aims to enhance the methods for estimating the shear capacity of circular concrete beams reinforced with FRP bars and spirals. By compiling a database, proposing models, and comparing with existing equations, it is found that the proposed models provide slightly more accurate shear strength estimations for FRP-reinforced concrete members with circular cross sections.
Article
Engineering, Civil
Shahzad Saleem, Amorn Pimanmas, Muhammad Irshad Qureshi, Winyu Rattanapitikon
Summary: The study aims to observe the influence of internal steel bars on the axial compressive response of noncircular RC column specimens confined with PET FRP. Test results show that the strength and deformation capacities of the confined specimens were significantly affected by the parameters considered, and PET FRP effectively restrained stress concentrations at the corners of bar buckling.
JOURNAL OF COMPOSITES FOR CONSTRUCTION
(2021)
Article
Construction & Building Technology
Othman Hameed Zinkaah, Zainab Alridha, Musab Alhawat
Summary: This study evaluates the flexural performance of polymer bars reinforced geopolymer concrete (FRP-GPC) beams through numerical and theoretical investigations. The numerical study develops nonlinear finite element models validated with experimental data, while the theoretical study assesses the accuracy of design codes in predicting the loading capacity of FRP-GPC beams. The results show the significant role of compressive strength on load capacity and indicate the need for improvement in existing design standards for FRP-GPC beams.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Construction & Building Technology
C. W. Chan, S. S. Zhang, T. Yu
Summary: This study conducted tests on circular fibre-reinforced polymer-concrete-steel hybrid multitube concrete columns, finding that they have excellent axial load and deformation capacities, suitable for engineering structures. Comparison between test results and model predictions revealed that the existing model can reasonably predict axial load-strain behavior but largely underestimates ultimate strain. Further research may help in developing a more accurate model.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Physical
Yavuz Yardim, Salih Yilmaz, Marco Corradi, Waleed A. Thanoon
Summary: This study examines the effectiveness of using carbon-FRP anchors to improve the confinement of square reinforced concrete columns strengthened with FRP. The proposed anchors distribute stresses more uniformly, resulting in better confinement.
Article
Mechanics
Ahmed Gouda, Ahmed H. Ali, Hamdy M. Mohamed, Brahim Benmokrane
Summary: This study simulated full-scale reinforced-concrete circular-beams with glass fiber reinforced polymer bars and spirals using nonlinear finite element analysis, and conducted a parametric study to evaluate the significant effect of various parameters on the shear strength and behavior of the beams.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Civil
Khattab Al-Ghrery, Robin Kalfat, Riadh Al-Mahaidi, Nazar Oukaili, Alaa Al-Mosawe
Summary: This study investigates the use of gene expression programming (GEP) to develop a new model for predicting the shear force required to induce FRP CCS failure. A comprehensive database of 127 experimental data points of FRP-strengthened RC beams was compiled. The proposed GEP model showed significantly higher correlations with actual CCS failure loads compared to existing predictive models.
JOURNAL OF COMPOSITES FOR CONSTRUCTION
(2021)
Article
Construction & Building Technology
Yannian Zhang, Ning Li, Qingjie Wang, Zhijun Li, Xiaoyan Qin
Summary: The calculation formula for bearing capacity was verified and corrected through the study of the influences of different parameters on the shear behavior of concrete T-beams reinforced with surface-embedded FRP. The results show that surface-embedded FRP reinforcement technology can improve the overall stiffness and shear strength of beams.
Article
Engineering, Civil
Hongwei Lin, Huixin Zeng, Peng Feng, Cheng Jiang, Yuqing Zhang
Summary: This paper investigates the bond properties of wet-bonding interface in confined concrete through pullout and pushout tests. Test results indicate that the interfacial behavior of wet-bonding interface can be divided into three stages. Based on these results, a bond stress-slip model depending on the lateral pressure is developed.
ENGINEERING STRUCTURES
(2023)
Article
Chemistry, Physical
Binbin Zhou, Ruo-Yang Wu, Yangqing Liu, Xiaohui Zhang, Shiping Yin
Summary: A methodology for the flexural strength design of hybrid FRP-steel reinforced concrete beams is proposed, which can enhance the flexural capacity and ductility of concrete beams by arranging a hybrid combination of FRP and steel reinforcement. The design approach is applicable to beams with different reinforcement levels, and the calculation process is simplified and validated for accuracy.
Article
Construction & Building Technology
Jie-Kai Zhou, Wen-Kai Lin, Shao-Xiong Guo, Jun-Jie Zeng, Yu-Lei Bai
Summary: A novel type of PET FRP-confined FRP spiral reinforced concrete square columns were proposed in this study, which effectively alleviated the strain-softening behavior of PET FRP-confined concrete with internal FRP spiral reinforcement, leading to excellent mechanical performance.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Engineering, Multidisciplinary
Farid Abed, Chahmi Oucif, Yousef Awera, Haya H. Mhanna, Hakem Alkhraisha
Summary: The study conducted numerical analysis on the performance of square and circular concrete columns, as well as RC beams reinforced with different fiber reinforced polymer composites. The results showed that different configurations of CFRP wraps can enhance the ductility of columns, while the flexural capacity of RC beams reinforced with BFRP, GFRP and CFRP bars is significantly influenced by the diameter and type of the FRP reinforcement.
DEFENCE TECHNOLOGY
(2021)
Article
Engineering, Civil
Bingcheng Guo, Xiaoshan Lin, Yufei Wu, Lihai Zhang
Summary: Concrete structures reinforced with fiber-reinforced polymer (FRP) reinforcement have been widely used in civil engineering to enhance structural performances. However, their weakness lies in poor ductility and brittle failure. Compression yielding (CY), a new mechanism, is proposed to improve the ductility of FRP-reinforced concrete beams. In this study, the moment capacity and ductility of CY beams with T sections are analyzed, and the key variables are identified and investigated. The results show that using CY material with postmodulus ratio close to 0 enhances ductility, and increasing CY material strength significantly improves moment capacity. Increasing CY block height is the most effective measure to simultaneously improve moment capacity and ductility.
JOURNAL OF COMPOSITES FOR CONSTRUCTION
(2023)
Article
Engineering, Civil
Mohammad AlHamaydeh, George Markou, Nikos Bakas, Manolis Papadrakakis
Summary: This study utilizes artificial intelligence algorithms to model and interpret the behavior of fiber reinforced polymer (FRP)-reinforced concrete deep beams without stirrups. The study builds an AI-model that describes the shear capacity for FRP-reinforced deep beams, and investigates the effect of various factors on shear capacity. The AI-model demonstrates superior generalization on blind prediction datasets compared to design codes.
ENGINEERING STRUCTURES
(2022)
Article
Construction & Building Technology
Jamshid Esmaeili, Mahdi Ghaffarinia, Mehrab Nodehi, Osman Gencel, Jinyan Shi, Togay Ozbakkaloglu
Summary: Recent advances in high-performance insulating composite materials have led to the production of optimized lightweight structural sections in the construction industry. However, these sections often have lower fracture resistance and toughness, making them prone to brittle failure and crack propagation. This study demonstrates that the inclusion of hooked steel fibers can significantly increase fracture energy and characteristic length, paving the way for the development of highly ductile, structural-grade lightweight fiber reinforced concrete.
STRUCTURAL CONCRETE
(2023)
Article
Construction & Building Technology
Tijani Mohammed, Federico Aguayo, Mehrab Nodehi, Togay Ozbakkaloglu
Summary: This study evaluates the engineering properties of structural lightweight concrete, finding that the use of expanded clay improves the physico-mechanical and durability properties compared to expanded shale. Additionally, class C fly ash shows better mechanical performance compared to class F fly ash, although it has lower durability in certain variables.
STRUCTURAL CONCRETE
(2023)
Article
Polymer Science
Ali Murat Surucu, Serkan Subasi, Aamar Danish, Osman Gencel, Azime Subasi, Togay Ozbakkaloglu
Summary: In this study, polymer/glass fiber fabric-based nanocomposite plates filled with different filler materials (barite, magnetite, and colemanite) and single-walled carbon nanotubes (SWCNTs) were fabricated. The mechanical properties, thermal conductivity, and radiation shielding properties of the specimens were evaluated. The results showed that the specimens filled with barite and magnetite exhibited adequate mechanical properties, especially in terms of Charpy impact strength. Barite-filled specimens outperformed colemanite and magnetite-filled specimens in terms of mechanical properties. Efficient dispersion techniques could further enhance the mechanical performance of the filler-modified specimens. Additionally, the thermal conductivity and radiation shielding properties of the specimens filled with filler materials were improved compared to specimens without fillers.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Construction & Building Technology
Mehmet Kaya, Fuat Koksal, Muhammed Bayram, Mehrab Nodehi, Osman Gencel, Togay Ozbakkaloglu
Summary: As an alternative to OPC, AAMs have been studied for their potential to reduce the ecological footprint. This study used marble powder to replace kaolin as a precursor and investigated the effect of sodium concentration, curing temperature, and marble powder content on the physico-mechanical properties of AAMs. The results showed that curing temperature had a significant impact on the performance of the geopolymers, while high sodium content and exposure to higher curing temperatures negatively affected the properties. The inclusion of marble powder was effective in reducing porosity and enhancing the properties at lower curing temperatures.
STRUCTURAL CONCRETE
(2023)
Review
Green & Sustainable Science & Technology
Kiran Khurshid, Aamar Danish, Muhammad Usama Salim, Muhammed Bayram, Togay Ozbakkaloglu, Mohammad Ali Mosaberpanah
Summary: In the digital era, the adoption of the Internet of Things (IoT) in the construction industry is limited compared to other industries. Integrating Construction 4.0 drivers such as BIM and procurement with IoT devices can improve construction and operational efficiencies. However, research on IoT and Construction 4.0 integration is still in its early stages. This study provides a comprehensive review of the current state of IoT adoption in Construction 4.0, as well as the barriers unique to developing countries.
Article
Water Resources
Imaduddin Ahmed, Margarita Garfias Royo, Eyitayo Opabola, Sukiman Nurdin, Ella Meilianda, Yunita Idris, Ibnu Rusydy, Helene Joffe, Priti Parikh
Summary: This study examines the condition of water, sanitation, and hygiene (WASH) facilities in schools in Central Sulawesi after the 2018 earthquake. It finds that many schools have inadequate WASH facilities, including insufficient hygiene supplies and uncovered water storage containers. Private schools provide better WASH services, while state schools in earthquake-affected areas have slower recovery and lower-quality facilities.
JOURNAL OF WATER SANITATION AND HYGIENE FOR DEVELOPMENT
(2023)
Article
Green & Sustainable Science & Technology
Ozlem Salli Bideci, Hakan Yilmaz, Osman Gencel, Alper Bideci, Bekir Comak, Mehrab Nodehi, Togay Ozbakkaloglu
Summary: In this study, silica fume and fiber-reinforced lightweight pumice were added to produce lightweight concrete that exhibits better performance at high temperatures. The mechanical properties of calcium aluminate cement (CAC) samples with pumice aggregates were evaluated and compared to crushed stone samples at temperatures ranging from 200 to 1000 degrees C. The results suggest that CACs with lightweight pumice have superior mechanical properties when exposed to high temperatures, indicating the suitability of producing lightweight thermal-resistant CAC-based concretes.
Article
Geosciences, Multidisciplinary
Syamsidika, Teuku Muhammad Rasyif, Hermann M. Fritz, Yunita Idris, Ibnu Rusydy
Summary: This research aims to investigate potential structures to serve as alternative tsunami vertical evacuation buildings for tsunami-prone cities like Banda Aceh. Results showed that around 96 to 134 buildings, including schools, hotels, an assembly hall, government offices, and houses, could be used for tsunami vertical evacuation. This offers a significant increase in capacity compared to the current official tsunami escape buildings in Banda Aceh, Indonesia.
INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION
(2023)
Article
Geosciences, Multidisciplinary
Eyitayo A. Opabola, Carmine Galasso, Tiziana Rossetto, Ella Meilianda, Yunita Idris, Sukiman Nurdin
Summary: This paper highlights the importance of investing in resilient school infrastructure for post-disaster recovery and presents evidence-based recommendations for Central Sulawesi, Indonesia, a region still recovering from a major earthquake, tsunami, and liquefaction event in 2018.
INTERNATIONAL JOURNAL OF DISASTER RISK REDUCTION
(2023)
Article
Engineering, Manufacturing
Mehrab Nodehi, Liam Omer, Bahram Asiabanpour, Togay Ozbakkaloglu
Summary: Three decades ago, additive manufacturing (AM) was first applied in the construction industry with the development of the contour crafting process. Since then, AM has shown significant advantages in reducing labor cost and construction waste, as well as improving efficiency and flexibility, leading to the development of large-scale commercial machines in the field. However, affordable lab-scale machines for training experts and conducting research-based activities are lacking. This paper compares two low-cost, modular AM-based construction systems that can extrude a wide variety of cementitious materials with diverse aggregate sizes, and examines the resulting mechanical performance and shrinkage of additively manufactured cementitious parts.
PROGRESS IN ADDITIVE MANUFACTURING
(2023)
Article
Construction & Building Technology
Ertugrul Erdogmus, Mucahit Sutcu, Saddam Hossain, Muhammed Bayram, Ahmet Sari, Osman Gencel, Togay Ozbakkaloglu
Summary: In recent years, there has been increasing interest in eco-friendly construction materials that reduce environmental impact while maintaining high performance. This study explores the use of naturally occurring zeolite as a sustainable material for ceramic bricks in construction. The study investigates the effects of molding pressure and firing temperature on the properties of zeolite bricks, finding that increasing firing temperature has a significant impact on compressive strength, porosity, and water absorption, while increasing molding pressure has a minimal effect.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Osman Gencel, Mehrab Nodehi, Ahmet Bozkurt, Ahmet Sari, Togay Ozbakkaloglu
Summary: This study examines the effects of foaming agent and aggregate content on the properties of foam concrete mixes. By using micro-Computerized Tomography scanning and image processing, the researchers were able to measure the porosity fraction of porous materials and foam concretes. The results show that increasing aggregate content improves the physical and mechanical properties of foam concrete, while the proposed CT scanning and image processing approach proves to accurately measure pore content in foam concrete samples.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Fatih Kocyigit, Muhammed Bayram, Gokhan Hekimoglu, Vedat Veli Cay, Osman Gencel, Abid Ustaoglu, Ahmet Sari, Ertugrul Erdogmus, Togay Ozbakkaloglu
Summary: This study aims to develop a novel and environmentally friendly foam concrete incorporating capric acid saturated waste basalt powder. The results show that this foam concrete has high latent heat of phase change and can effectively store and regulate thermal energy. This material can be considered as an environmentally friendly building material for thermoregulation and energy conservation.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Green & Sustainable Science & Technology
Veyis Selen, Omer Guler, Mehrab Nodehi, Ahmet Sari, Ali Yaras, Osman Gencel, Aliakbar Gholampour, Togay Ozbakkaloglu
Summary: Recent growth in materials science and engineering technologies has led to new applications in the construction industry for smart and electrically conductive products. This study examines the use of Fe3O4-MWCNTs nanocomposites in cementitious mortars to enhance electrical conductivity. The results show a decrease in electrical resistivity and an increase in porosity, which have both positive and negative effects on the physico-mechanical properties of the mortars. However, the improvement in electrical conductivity without significant compromise to the properties makes these materials suitable for various fields.
Article
Construction & Building Technology
Abdoslam Abdallaa Alnkaa, Aamar Danish, Hasbi Yaprak, Selcuk Memis, Osman Gencel, Mugahed Amran, Togay Ozbakkaloglu
Summary: Geopolymer technology provides ecological and monetary benefits in waste management. This study found that fly ash and waste glass powder replacement in ternary blended geopolymers improves strength performance and resistance to freeze-thaw and sulfate attack. Water and steam curing methods result in better early and later-age mechanical and durability properties.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Civil
Jian Xue, Weiwei Zhang, Jing Wu, Chao Wang, Hongwei Ma
Summary: This study integrates a plate-type local resonator with varying free boundaries within a plate to convert the initial low-order global vibration modes into localized vibration modes. A novel semi-analytical method is proposed to analyze the free vibration of the plate with thickness and displacement discontinuities. The results show that by applying free boundary conditions, the low-order localized vibration frequencies can be significantly reduced without affecting the low-order global frequencies.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Merve Tunay
Summary: In recent years, there has been an increasing number of studies on the mechanical properties of sandwich structures manufactured with the Fused Deposition Modeling (FDM) method. However, there is still a lack of experimental data on the mechanical characteristics of FDM-manufactured sandwich structures under different thermal aging durations. In this experiment, the energy absorption capabilities of sandwich structures with different core geometries were investigated under various thermal aging durations. The results showed that the core topology significantly influenced the energy absorption abilities of the sandwich structures.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Zi-qin Jiang, Zi-yao Niu, Ai-Lin Zhang, Xue-chun Liu
Summary: This paper proposes a crosssection corrugated plate steel special-shaped column (CCSC) that improves the bearing capacity and overall stability of structural columns by using smaller material input. Through theoretical analysis and numerical simulation, the overall stability of the CCSC under axial compression is analyzed. The design method and suggestions for the stability of CCSC are put forward. Compared with conventional square steel tube columns, the CCSC has obvious advantages in overall stability and steel consumption.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Yong Zhang, Yangang Chen, Jixiang Li, Jiacheng Wu, Liang Qian, Yuanqiang Tan, Kunyuan Li, Guoyao Zeng
Summary: A hybrid TPMS method was proposed to develop a new TPMS structure, and the mechanical properties of different TPMS structures were studied experimentally and numerically. Results showed that the hybrid TPMS structure had higher energy absorption and lower load-carrying capacity fluctuation. Further investigations revealed that the topological shape and material distribution had significant influence on mechanical properties, and the hybrid additive TPMS structure exhibited significant crashworthiness advantage in in-plane crushing condition.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Tongfei Sun, Ye Liu, Kaoshan Dai, Alfredo Camara, Yujie Lu, Lijie Wang
Summary: This paper presents a series of experimental and numerical studies on the performance of a novel double-stage coupling damper (DSCD). The effects of damper configuration, friction-yield ratio (Rfy), and loading protocol on the hysteresis performance of the DSCD are investigated. The test results demonstrate that the arrangement of ribs in the DSCD increases its energy dissipation capacity. Numerical analysis reveals that the length of the friction mechanism and the clearance between the yield segment and the restraining system affect the energy dissipation and stability of the damper.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Jeonghwa Lee, Young Jong Kang
Summary: This study investigates the local buckling behavior and strength of I-shape structural sections by considering flange-web interactions through three-dimensional finite element analysis. The study provides a more reasonable estimation of local buckling strength by considering the ratio of flange-web slenderness and height-to-width ratio, and presents design equations for flange local and web-bend buckling coefficients.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Yizhe Chen, Wenfeng Xiang, Qingsong Zhang, Hui Wang, Lin Hua
Summary: This study investigates the surface modification of a nickel plate to improve the bonding strength with carbon fiber-reinforced plastics (CFRP). The results show that different surface modification methods, including sandblasting, coupling agent treatment, and compound coupling agent treatment, significantly enhance the bonding strength of CFRP/Ni joints. The research provides insights into improving the connection between nickel and CFRP, as well as other heterogeneous materials.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Agha Intizar Mehdi, Fengping Zhang, Moon-Young Kim
Summary: A spatial stability theory of mono-symmetric thin-walled steel beams pre-stressed by spatially inclined cables is derived and its validity is demonstrated through numerical examples. The effects of initial tension, deviator numbers, inclined cable profiles, and bonded/un-bonded conditions on lateral-torsional buckling of the pre-stressed beams are investigated, with a specific emphasis on the effects of increasing initial tension.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Teng Ma, Jinxiang Wang, Liangtao Liu, Heng Li, Kui Tang, Yangchen Gu, Yifan Zhang
Summary: The structural response of water-back plate under the combined action of shock wave and bubble loads at water depths of 1-300 m was numerically investigated using an arbitrary Lagrange-Euler method. The accuracy of the numerical model was validated by comparing with experimental and theoretical results. The influences of water depth and length-to-diameter ratio of the charge on the combined damage effect were analyzed. The results show that as water depth increases, the plastic deformation energy of the water-back plate decreases, and the permanent deformation mode changes from convex to concave. When the charge has a large length-to-diameter ratio, the plastic deformation energy of the radial plate is higher than that of the axial plate, and the difference decreases with increasing water depth. Increasing the length-to-diameter ratio enhances the combined damage effect in the radial direction in deep-water environments.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Qiu-Yun Li, Ben Young
Summary: This paper investigates the flexural performance of CFS zed section members bent about the neutral axis parallel to the flanges through experimental and numerical analysis. The results show that the current direct strength method generally provides conservative predictions for the flexural strength of unstiffened zed section members, but slightly unconservative design for edge-stiffened zed section beams. The nominal flexural strengths of zed section members with edge stiffeners were found to be underestimated by 17% to 21% on average. Modified DSM formulae are recommended for the design of CFS zed section beams.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Weinan Gao, Bo Song, Xueyan Chen, Guochang Lin, Huifeng Tan
Summary: This paper presents a precise method for predicting deformation in large-scale inflatable structures, utilizing finite element modeling and laser scanning technique. The study shows a good agreement between the predictive model and non-contact measurement results.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Fei Gao, Zongyi Wang, Rui Zhu, Zhenming Chen, Quanxi Ye, Yaqi Duan, Yunlong Jia, Qin Zhang
Summary: This research investigates the mechanical properties of high-strength ring groove rivet assemblies and the load resistances of riveted T-stubs. Experimental tests reveal that Grade 10.9 rivets have higher yield strength and strain, and lower ultimate strain, making them suitable for high-strength ring groove rivet connections. Increasing the rivet diameter benefits the T-stubs, while increasing the flange thickness is not always advantageous. The Eurocode 3 method is not suitable for T-stubs connected through ring groove rivets, while the Demonceau method is conservative.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Shangchun Jiang, Liangfeng Sun, Haifei Zhan, Zhuoqun Zheng, Xijian Peng, Chaofeng Lue
Summary: This study investigates the bending behavior of two-dimensional nanomaterials, diamane and its analogous structure TBGIB, through atomistic simulations. It reveals that diamane experiences structural failure under bending, while TBGIB bends elastically before undergoing structural failure. The study provides valuable insights for the application of these materials in flexible electronics.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Qiang Zhang, Jianian Wen, Qiang Han, Hanqing Zhuge, Yulong Zhou
Summary: In this study, the mechanical properties of Q690 steel H-section columns under bi-directional cyclic loads are investigated, considering the time-varying characteristics of corrosion. A refined finite element (FE) model is built to analyze the degradation of mechanical property and failure mechanisms of steel columns with different design parameters during the whole life-cycle. The study proposes a quantitative calculation method for the ultimate resistance and damage index of steel columns, taking into account the ageing effects. The findings emphasize the importance of considering the ageing effects of steel columns in seismic design.
THIN-WALLED STRUCTURES
(2024)
Article
Engineering, Civil
Yuda Hu, Qi Zhou, Tao Yang
Summary: The magneto-thermo-elastic coupled free vibration of functionally graded materials cylindrical shell is investigated in this study. The vibration equation in multi-physical field is established and solved using the Hamilton principle and the multi-scale method. The numerical results show that the natural frequency is influenced by various factors such as volume fraction index, initial amplitude, temperature, and magnetic induction intensity.
THIN-WALLED STRUCTURES
(2024)