Article
Engineering, Civil
Kuang-Yu Dai, Xiao-Hui Yu, Kai Qian, Dai-Yu Wang
Summary: This study collected extensive test data and established a database to evaluate the deformation capacity of FRP retrofitted corroded columns for determining their compliance with safety requirements. By developing empirical prediction models, the yield and ultimate rotation angles of FRP retrofitted corroded columns were successfully predicted. The accuracy of these models has been validated.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Civil
Jinjin Xu, Zhimin Wu, Qi Cao, Rena C. Yu
Summary: Replacing GFRP bars with SS bars in concrete columns can effectively solve corrosion problems in harsh environments. The research studied the eccentric compression behavior of SSC columns reinforced with GFRP and SS bars and analyzed the effect of reinforcement stiffness on the N-M interaction diagrams. The results showed that replacing GFRP bars with SS bars improved the ductility of the columns, and the failure mode was influenced by the axial stiffness of the reinforcement.
ENGINEERING STRUCTURES
(2023)
Article
Construction & Building Technology
Ali Raza, Babar Ali, Hafiz Muhammad Usman Aslam
Summary: The study investigated the behavior of GFRP-reinforced concrete columns with hybrid fibers, comparing GHC columns with SHC columns in terms of axial strength and ductility. It was found that GHC columns had lower axial strength but higher ductility compared to SHC columns, with both showing similar failure modes. Eccentric loading led to significant decrease in axial strength of all columns. A theoretical analysis proposed a new equation for predicting the axial strength of GHC columns based on the influence of GFRP bars and confining mechanism of GFRP spirals.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Engineering, Civil
Yassir M. Abbas, Galal Fares, M. Iqbal Khan
Summary: The popularity of ultra-high-performance fiber-reinforced concrete (UHFRC) is increasing due to its superior strength and durability. In this study, beams made of UHPFRC were prepared using a combination of three microsteel fibers. The structural behavior of plain and bar-reinforced beams of different depths was examined. The results show that reinforced UHFRC beams exhibit more shear-flexural crack diffusion compared to plain UHFRC beams.
Article
Construction & Building Technology
Leonardo M. Massone, Sebastian Jara, Fabian Rojas
Summary: The utilization of thinner and more slender walls in the design of reinforced concrete shear wall structures has become popular but may lead to lateral instability. This study presents experimental results on the impact of cross-sectional slenderness variation on out-of-plane lateral instability. Three slender walls with different dimensions were tested and it was found that reduced thickness and increased length resulted in local and global lateral instability. The drift capacity of these walls decreased with thickness reduction and increased length.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Chunheng Zhou, Zongping Chen, Zhenhua Huang, Liping Cai
Summary: In this study, a double spiral reinforcement was developed for reliable lateral confinement in square reinforced concrete columns. The structural behavior of the columns was investigated through testing, and it was found that the double spirals provided satisfactory confinement, increasing the load-carrying capacity, stiffness, and ductility of the columns.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Engineering, Civil
Junaid Ahmad, Tao Yu, Muhammad N. S. Hadi
Summary: This study discusses a new type of column construction, and through experiments and discussions, it is found that using GFRP reinforcement and GFRP tube confinement can increase the ductility of concrete columns, especially for specimens based on GPC.
Article
Engineering, Civil
Shengjiang Sun, Yiping Guo, Peng Gui, Lili Xing, Kuihua Mei
Summary: The use of steel-basalt fibre composite bars (SBFCBs) effectively addresses the corrosion and poor ductility issues in steel-reinforced and pure FRP-reinforced concrete beams, respectively. The study investigates the flexural behavior of SBFCB-reinforced concrete beams through testing eleven beams with different reinforcement methods, aiming to provide design and application reference. The research encompasses the failure mode, ultimate bearing capacity, strain of concrete and reinforcement, crack distribution, and the effects of different reinforcement methods and equivalent reinforcement ratios. The results indicate the influence of the equivalent reinforcement ratio on the failure mode, cracking load values, yield load, ultimate load, and secondary stiffness of SBFCB-reinforced concrete beams, as well as the improved ductility and reduced crack parameters with increasing equivalent reinforcement ratio. The deduced formulas for yield load and ultimate bearing capacity show good agreement with the measured values, and a recommended maximum strain limit for SBFCBs is proposed.
ENGINEERING STRUCTURES
(2023)
Article
Chemistry, Physical
Jung-Hwan Hyun, Jin-Wook Bang, Bang-Yeon Lee, Yun-Yong Kim
Summary: This study investigated the effects of replacing concrete with ECC on the cyclic behavior of RC columns, showing that ECC columns exhibit higher cyclic behavior, especially in terms of energy dissipation capacity when the length is 3.6d or more.
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
Engineering, Civil
Morteza Naghipour, Mohsen Ahmadi, Mahdi Nematzadeh
Summary: This study investigated the impact of variable concrete confinement levels in different regions on the bearing capacity of composite columns. Experimental and numerical modeling results showed that with increasing eccentricity, the high confinement area of concrete decreased while the moderate confinement area increased. The study also presented relationships for calculating the confinement coefficients for different regions based on eccentricity.
Article
Engineering, Civil
Caglar Goksu
Summary: The study generates fragility functions for reinforced concrete columns incorporating recycled concrete aggregates, and defines three different damage states to map physical damage to repair categories for disaster management decision making. Additionally, ductility capacities of the columns’ seismic performances are discussed, showing that the ductility limit defined for columns made of natural aggregate concrete is also valid for columns made of recycled aggregate concrete. Moreover, fragility functions are also generated for columns made of natural aggregate concrete to compare damage progression and drift demand variability with columns made of recycled aggregate concrete.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Civil
Jian-Bo Zang, Bo Wu
Summary: A square concrete filled steel tubular (CFST) column with internal steel stirrups and thinner steel tube demonstrates superior fire resistance compared to a traditional CFST column without stirrups, without increasing total steel usage. Incorporating lumps of recycled concrete in the filling has minimal effect on axial compressive behavior.
Article
Engineering, Civil
Nahid Attarchian, Nader K. A. Attari, Zakariya Waezi
Summary: This study investigates the seismic behavior of rectangular reinforced concrete columns under pure flexure, pure torsion, and combined flexural-torsional loadings. The results show that under combined loading, the displacement capacity and moment capacity of the specimens decrease, compared to the pure-flexural case. An equation expressing the interaction between flexural and torsional moment strength capacity is proposed.
JOURNAL OF EARTHQUAKE ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Yousef Almashakbeh, Eman Saleh, Nabil M. Al-Akhras
Summary: This study explored the correlation between half-cell potential measurements and the flexural capacity of RC members, showing a high positive correlation between the two.
Article
Acoustics
Panxu Sun, Hong Yang, Yunjun Deng
Summary: The proposed complex mode superposition method based on the hysteretic damping model provides a unique and efficient approach for calculating vibration responses in nonproportionally damped linear systems. The method, implemented through user subroutines in ANSYS and MATLAB, shows higher accuracy and effectiveness compared to traditional methods. Shaking table tests further validate the unconditional convergence and independence of time step of the proposed method in time-domain dynamic analyses.
JOURNAL OF VIBRATION AND CONTROL
(2021)
Article
Acoustics
Panxu Sun, Dongwei Wang
Summary: The half-power bandwidth method for calculating structural damping parameters using frequency response functions (FRFs) is proposed in this note. The method is applied to displacement FRFs, velocity FRFs, and acceleration FRFs based on viscous and hysteretic damping models. The results show that the method has limited application conditions for displacement and acceleration FRFs but can be widely used for velocity FRFs, making it the preferred choice for calculating damping parameters.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Materials Science, Multidisciplinary
Dongwei Wang, Hao Xu, Panxu Sun
Summary: A method for studying the basic deformation performance of bimodular simply supported beams is proposed, which can quantitatively identify different types of deformation and visualize dominant regions. A composite beam phenomenon occurs in bimodular simply supported shallow beams when there is a significant difference in tensile-compression elastic modulus.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Construction & Building Technology
Jia Fan, Tian Li, Panxu Sun, Dongwei Wang, Xu Chen
Summary: This paper presents a new truss-to-column connection for a prefabricated steel structure, and experimental study on its static performance. The experimental results demonstrate the evolution of stiffness, capacity, and failure mechanism of the connection, and discuss the constructional details and weakest elements of the connection.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Chemistry, Physical
Dongwei Wang, Kaixuan Liang, Panxu Sun
Summary: This paper proposes a method for modal strain energy decomposition, which can analyze the vibration modes of a structure and identify the relatively weak areas through the modal strain energy decomposition diagram and the modal strain energy cloud diagram.
Article
Engineering, Civil
Dongwei Wang, Mengfei Shang, Panxu Sun
Summary: The quantitative analysis of seismic performance under small and moderate earthquakes is important. Using only the stiffness distribution index is no longer applicable, and the influence of mass distribution must be considered. In this study, the equation of motion is simplified into the equilibrium equation of the dynamic matrix by the quasi-static method. A condition number index of dynamic matrix is proposed to evaluate the seismic performance of truss structures, considering both stiffness and mass distribution. The correctness of the proposed index is verified and it is found that it provides a more reasonable evaluation result compared to other indexes.
INTERNATIONAL JOURNAL OF STRUCTURAL STABILITY AND DYNAMICS
(2023)
Article
Chemistry, Multidisciplinary
Qinglin Liu, Yali Wang, Panxu Sun, Dongwei Wang
Summary: This study analyzed the transient and steady responses of a single degree of freedom system based on viscous damping and hysteretic damping models. The results showed that the dynamic responses based on the two damping models were approximately equal in small damping cases, but the difference between the two models gradually increased with the increase in damping ratio.
APPLIED SCIENCES-BASEL
(2022)
Article
Economics
Qingyu Wang, Hao Zhu, Panxu Sun
Summary: In China, the positive correlation between land supply and house prices challenges the common belief that expanding land supply would alleviate the pressure on house prices. Especially in high-priced areas, the relationship between house prices and land supply becomes more significant. This is because local governments use land revenue to attract industries and develop infrastructure, resulting in a positive externality of increased land supply and rising housing prices.
APPLIED ECONOMICS LETTERS
(2023)
Article
Chemistry, Physical
Shuxia Wang, Jiajun He, Panxu Sun
Summary: This paper investigates the anti-reflection effect and characteristics of vanadium oxide deposited on pattern SiO(2 )via atomic layer deposition and annealed. The results show that the annealed VO2@pattern SiO2 has fewer crevices and better anti-reflection effect. The prepared anti-reflective materials exhibit ultra-low reflectance in the visible near-infrared wavelength range, showing significant application prospects in the field of intelligent optoelectronic devices.
Article
Engineering, Civil
Panxu Sun, Kaixuan Liang, Hao Xu, Dongwei Wang
Summary: Based on orthogonal completeness and mechanical equilibrium, the deformation decomposition method is improved and applied to orthotropic structures, considering the physical parameters of materials. The method quantitatively identifies and visualizes different deformation energies in orthotropic structures, and discusses the influence of elastic modulus ratios on the seismic performance of orthotropic shear walls. The results show that appropriate adjustments of the elastic moduli ratios improve ductility but weaken lateral resistance.
Article
Acoustics
Shuxia Wang, Jiajun He, Jia Fan, Panxu Sun, Dongwei Wang
Summary: In this paper, the divergent behavior of free vibration responses is studied based on a complex time-domain damping model. The traditional step by step integration method is not applicable for calculating the time-domain responses. To overcome this limitation, an equivalent viscous damping model and the corresponding average acceleration method are proposed. Numerical cases demonstrate the convergence and correctness of the proposed method, as well as its high computational efficiency.
JOURNAL OF LOW FREQUENCY NOISE VIBRATION AND ACTIVE CONTROL
(2023)
Article
Chemistry, Physical
Panxu Sun, Shuxia Wang, Jiehu Cui
Summary: A multilayer Ti10Zn oxide film with similar properties of TiO2 and ZnO has been obtained by atomic layer deposition, which shows excellent electrodynamic and optical properties with great application potential.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Engineering, Civil
Dongwei Wang, Kaixuan Liang, Panxu Sun
Summary: This paper proposes a deformation decomposition method based on the orthogonal mechanical basis matrix, which can quantitatively analyze the deformation characteristics of thin plates and determine the dominant basic deformation modes. Meanwhile, the deformation rules of bidirectional thin plates with different sizes of central holes are studied.
STRUCTURAL ENGINEERING AND MECHANICS
(2022)
Article
Acoustics
Panxu Sun, Shuxia Wang, Dongwei Wang
Summary: This paper constructs a frequency-independent time-domain damping model based on the hysteretic damping model for time-domain analysis. Equivalent damping models in complex domain and real domain are proposed, and stable convergence of free vibration responses is achieved through numerical methods. The numerical results show high computational accuracy for vibration responses caused by earthquake waves.
JOURNAL OF LOW FREQUENCY NOISE VIBRATION AND ACTIVE CONTROL
(2022)
Article
Construction & Building Technology
Dongwei Wang, Mengfei Shang, Panxu Sun
Summary: This paper proposes a method for comprehensive deformation analysis of a truss and verifies its correctness and superiority by comparing it with traditional methods. Additionally, a relative deformation decomposition method is introduced for detailed analysis. Furthermore, the method is applied to analyze the relative deformation of a plane truss structure under different load conditions. The basic deformation performance of the structure can be quantitatively analyzed using countable mode shapes.
Article
Engineering, Civil
Renbing An, Jiacong Yuan, Yi Pan, Duhang Yi
Summary: Traditional timber structures built on sloped land are more susceptible to seismic damage compared to structures built on flat land. The upper portion of the structure is found to be the weak point on sloped land, with potential issues such as tenon failure and column foot sliding.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Elyas Bayat, Federica Tubino
Summary: The current design guidelines for assessing floor vibration performance do not consider the influence of variability in the walking path on the dynamic response of floors. This study investigates the dynamic response of floors under a single pedestrian walking load, taking into account the randomness of the walking path and load. The effectiveness of the current guidelines in predicting floor response is critically assessed.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Gao Ma, Chunxu Hou, Hyeon-Jong Hwang, Linghui Chen, Zhenhao Zhang
Summary: Minimizing earthquake damage and improving repair efficiency are the main principles of resilient structures. This study proposed a repairable column with UHPC segments and replaceable energy dissipaters. The test results showed that the columns with UHPC segments and replaceable dissipaters exhibited high strength, deformation capacity, and energy dissipation.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Kartheek S. M. Sonti, Pavan Kumar Penumakala, Suresh Kumar Reddy Narala, S. Vincent
Summary: In this study, the compressive behavior of alumina hollow particles reinforced aluminum matrix syntactic foams (AMSF) was investigated using analytical, numerical, and experimental methods. The results showed that the FE solver ABAQUS could accurately predict the elastic and elastio-plastic behavior of AMSFs. The study also suggested that FE models have great potential in developing new materials and composites under compression loading.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Zheqi Peng, Xin Wang, Zhishen Wu
Summary: In this study, the statistical modeling of fiber-reinforced polymer (FRP) cables using the classic fiber bundle model is explored. The study considers important features of large-scale multi-tendon FRP cables, such as initial random slack and uneven tensile deformation among tendons. A parametric study and reliability analysis are conducted to predict the load-displacement relation and design thousand-meter-scale FRP cables. The study emphasizes the relation between the reliability index beta of the cable and the safety factor gamma of the FRP material.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Yanchao Shi, Shaozeng Liu, Ye Hu, Zhong-Xian Li, Yang Ding
Summary: This paper introduces a damage assessment method for reinforced concrete (RC) columns under blast loading, using modal parameter measurement as the evaluation index. The validity of the proposed method is validated through numerical and experimental analysis. The results show that this modal-based damage assessment method is applicable for non-destructive evaluation of blast-induced damage of RC columns.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Xiaolin Zou, Maosheng Gong, Zhanxuan Zuo, Qifang Liu
Summary: This paper proposes an efficient framework for assessing the collapse capacity of structures in earthquake engineering. The framework is based on an accurate equivalent single-degree-of-freedom (ESDOF) system, calibrated by a meta-heuristic optimization method. The proposed framework has been validated through case studies, confirming its accuracy and efficiency.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Jie Hu, Weiping Wen, Chenyu Zhang, Changhai Zhai, Shunshun Pei, Zhenghui Wang
Summary: A deep learning-based rapid peak seismic response prediction model is proposed for the most common two-story and three-span subway stations. The model predicts the peak seismic responses of subway stations using a data-driven approach and limited information, achieving good predictive performance and generalization ability, and demonstrating significantly higher computational efficiency compared to numerical simulation methods.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Jin Ho Lee, Jeong-Rae Cho
Summary: A simplified model is proposed to estimate the earthquake responses of a rectangular liquid storage tank considering the fluid-structure interactions. The complex three-dimensional structural behavior of the tank is represented by a combination of fundamental modes of a rectangular-ring-shaped frame structure and a cantilever beam. The system's governing equation is derived, and earthquake responses such as deflection, hydrodynamic pressure, base shear, and overturning moment are obtained from the solution.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
W. J. Lewis, J. M. Russell, T. Q. Li
Summary: The work discusses the key features and advantages of optimal 2-pin arches shaped by statistically prevalent load and constant axial stress. It extends the design space of symmetric arches to cover asymmetric forms and provides minimum values of constant stress for form-finding of such arches made of different materials. The analysis shows that constant stress arches exhibit minimal stress response and have potential implications for sustainability and durability of future infrastructure.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Wen-ming Zhang, Han-xu Zou, Jia-qi Chang, Tian-cheng Liu
Summary: Saddle position is crucial in the construction and control of suspension bridges. This study proposes an analytical approach to estimate the saddle positions in the completed bridge state and discusses the calculation under different definitions. The relationship between the saddle position and the tower's centerline is analyzed, along with the eccentric compression of the tower. The feasibility of the proposed method is verified through a real-life suspension bridge.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Shaise K. John, Alessio Cascardi, Yashida Nadir
Summary: This study experimentally investigated the use of TRM material for reinforcing concrete columns. The results showed that increasing the number of textile layers effectively increased the axial strength. Additionally, the choice of fiber type and hybrid textile configuration also had a significant impact on strength improvement. A new design model that considers the effects of both the confining matrix and textile was proposed.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Chandrashekhar Lakavath, S. Suriya Prakash
Summary: This study experimentally investigated the shear behavior of post-tensioned UHPFRC girders, considering factors such as prestress level, fiber volume fraction, and types of steel fibers. The results showed that increasing prestress and fiber dosage could enhance the ultimate load-carrying capacity of the girders, reduce crack angle, and increase shear cracking load.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Vahid Goodarzimehr, Siamak Talatahari, Saeed Shojaee, Amir H. Gandomi
Summary: In this paper, an Improved Marine Predators Algorithm (IMPA) is proposed for size and shape optimization of truss structures subject to natural frequency constraints. The results indicate that IMPA performs better in solving these nonlinear structural optimization problems compared to other state-of-the-art algorithms.
ENGINEERING STRUCTURES
(2024)
Article
Engineering, Civil
Chun-Xu Qu, Jin-Zhao Jiang, Ting-Hua Yi, Hong-Nan Li
Summary: In this paper, a computer vision-based method is proposed to monitor the deformation and displacement of building structures by obtaining 3D coordinates of surface feature points. The method can acquire a large number of 3D coordinates in a noncontact form, improve the flexibility and density of measurement point layout, and is simple and cost-effective to operate.
ENGINEERING STRUCTURES
(2024)