Article
Engineering, Mechanical
Yanpeng Wang, Jie Li
Summary: This study investigates the influence of randomness at the material level on fatigue behaviors of reinforced concrete structures, resulting in significant scatter in fatigue lives, failure modes, deflections, and strains of the specimens, with different failure modes explained by competing mechanisms. The S-Nc curve approach was found to be unable to accurately estimate the failure modes of the specimens.
INTERNATIONAL JOURNAL OF FATIGUE
(2021)
Article
Construction & Building Technology
Asmaa Said, Mahmoud Elsayed, Ahmed Abd El-Azim, Fadi Althoey, Bassam A. Tayeh
Summary: This paper evaluates the effectiveness of using ultra-high performance fiber reinforced concrete (UHPFRC) as a strengthening technique to improve the shear strength of RC beams. The experimental results show that UHPFRC is an effective technique, significantly improving the ultimate shear strength, initial stiffness, ductility, and toughness of the beams. Full casting of UHPFRC and strengthening with vertical or inclined strips were found to have a substantial contribution in increasing shear capacity.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Construction & Building Technology
Jin Xia, Keyu Chen, Yifan Wu, Weiqiang Xiao, Weiliang Jin, Jun Zhang
Summary: This study compared the shear fatigue behavior of reinforced concrete beams using different types of fine aggregates, including manufactured sand (M-Sand), and evaluated the fatigue life performance of M-Sand concrete beams. The results showed that the fatigue life was influenced by stress/load range, methylene blue (MB) value, average permanent deflection, and total dissipation energy of the concrete beams.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Dang Quang Ngo, Huy Cuong Nguyen, Huu Tai Dinh, Duy Tien Nguyen, Dinh Loc Mai
Summary: This paper investigates the shear behavior of corroded stirrups reinforced concrete beams strengthened with textile reinforced concrete. Experimental results show that the shear strength of corroded specimens decreased by 16.08% to 25.34%, while the shear capacity of corroded beams strengthened with carbon TRC improved by 60.6%.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Engineering, Civil
Cao Thanh Ngoc Tran, Xuan Huy Nguyen, Anh Tuan Le, Huy Cuong Nguyen, Dang Dung Le
Summary: Shear tests were conducted on six GFRP reinforced concrete beams with aspect ratios ranging from 2.3 to 2.8 to investigate the effectiveness of using textile reinforced concrete in shear strengthening. The results showed that textile reinforced concrete was capable of enhancing the shear strengths of beams with different aspect ratios, and increasing the number of fibre layers in textile reinforced concrete was effective in improving both shear strengths and post-elastic stiffness of the beams.
Article
Engineering, Civil
Peng Zhu, Jiajing Xu, Wenjun Qu
Summary: The research focused on the fatigue shear performance of glass-fiber-reinforced polymer bars in reinforced concrete beams, finding that the initial fatigue level has a greater influence on crack development and fatigue life. The fatigue strength of glass-fiber-reinforced polymer stirrups was considerably lower, with shear being the main failure mode.
FRONTIERS OF STRUCTURAL AND CIVIL ENGINEERING
(2021)
Article
Construction & Building Technology
Hadi Aryan, Bora Gencturk, Tarek Alkhrdaji
Summary: This study investigates the performance of externally strengthened RC T-beams with splay anchored strips of FRP composites under cyclic shear loading for both normal and high strength concrete. The results show that this retrofit technique can increase the shear capacity of the beams and improve the ductility prior to failure.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Fausto Mistretta, Mario Lucio Puppio, Guido Camata, Antonio Nanni
Summary: This research analyzes various formulas for shear capacity in international standards and validates them through experiments. The study focuses on cases involving reduced shear reinforcement and less stirrups than the minimum recommended by standards. Through beam tests, the research finds that different flexural GFRP reinforcement ratios have varying effects on shear capacity and cause different failure mechanisms.
MATERIALS AND STRUCTURES
(2023)
Article
Construction & Building Technology
Kaiqi Zheng, Siwen Ni, Yaohui Zhang, Junxuan Gu, Mingming Gao, Yang Wei
Summary: A shear degradation model that considers shear deformation is proposed to evaluate the post-cracking stiffness of slender reinforced concrete beams with diagonal cracks. The model quantifies the stiffness degradation tendency by establishing the relationship between stirrup yielding shear stiffness and elastic shear stiffness, and can accurately predict deflection of the beams as well as capture the full-range features of shear strain curves.
Article
Engineering, Multidisciplinary
Xuesen Li, Jie Dai, Mingke Deng
Summary: This paper investigates the shear performance of HDC beams reinforced with stirrups and found that HDC led to limited crack propagation, multiple micro diagonal cracks, and ductile shear failure mode with significant nonlinear response. The contribution of longitudinal reinforcement in HCD specimens for shear strength was larger than in RC specimens, resulting in an average increment in shear strength of about 19%.
ALEXANDRIA ENGINEERING JOURNAL
(2021)
Article
Mechanics
Ahmed El Refai, Wael Alnahhal, Abathar Al-Hamrani, Sarah Hamed
Summary: This paper presents the experimental and analytical investigation of the shear performance of concrete beams reinforced with basalt fibers and basalt fiber-reinforced polymer bars. The results show that adding basalt macrofibres improves the shear capacity of the beams, and a new shear model is proposed for predicting the shear strength.
COMPOSITE STRUCTURES
(2022)
Article
Construction & Building Technology
Noor Ayaad, Nazar Oukaili
Summary: This study investigates the impact responses and torsional behavior of reinforced concrete L-shaped spandrel beams under eccentric loading using strengthening techniques. The results show that the impact force increased by 46% for specimens with CFRP sheets and by 14.5% for specimens treated with the ETS method. The ETS technique proved to be more effective in enhancing torsional capability.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Construction & Building Technology
Ruizhe Li, Mingke Deng, Yangxi Zhang, Ding Wei
Summary: This paper presents an experimental investigation on the shear behavior of reinforced concrete deep beams strengthened with highly ductile fiber-reinforced concrete jackets. The results show that the shear strengthening effectiveness of the HDC jacket for RC beams is obvious. The shear capacity of the beams strengthened with HDC can be significantly improved by configuring stirrups in the jacket or increasing the jacket thickness.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Yasin Onuralp Ozkilic, Memduh Karalar, Ceyhun Aksoylu, Alexey N. Beskopylny, Sergey A. Stel'makh, Evgenii M. Shcherban, Shaker Qaidi, Iully da S. A. Pereira, Sergio Neves Monteiro, Afonso R. G. Azevedo
Summary: This study investigated the effect of aluminum waste on reinforced concrete shear beams to prevent shear damage. There is a lack of research on the use of aluminum waste to produce expandable concrete and its usage in reinforced concrete structures. Experimental investigations were performed on different reinforced concrete beams with varying aluminum waste ratios and shear reinforcement spacing. The results showed that the load capacity of the aluminum waste combined beams increased as the stirrup reinforcement decreased, but decreased with increasing aluminum waste quantity in the concrete mixture. However, a decrease in load capacity of 1 vol.% aluminum waste was tolerable.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Mechanical
Jie Wei, Jun Li, Chengqing Wu, Zhong-xian Liu, Jianguang Fang
Summary: Three strengthening designs based on ultra-high performance concrete (UHPC) are proposed in this study to improve the impact resisting performance of reinforced concrete (RC) components. Drop hammer impact tests show that UHPC strengthened beams exhibit good impact resistance, with non-attached interfaces leading to even better impact resistance. Nonlinear finite element modeling was used to further interpret the experimental results and study the effects of different parameters on the shear mechanisms of RC beams and RC-UHPC beams.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2021)
Article
Construction & Building Technology
Carlos Zanuy, Luis Albajar
STRUCTURAL CONCRETE
(2018)
Article
Construction & Building Technology
Carlos Zanuy
INTERNATIONAL JOURNAL OF STEEL STRUCTURES
(2019)
Article
Engineering, Civil
Ramon Hingorani, Peter Tanner, Carlos Zanuy
Article
Construction & Building Technology
Carlos Zanuy, Gonzalo S. D. Ulzurrun
STRUCTURAL CONCRETE
(2019)
Article
Engineering, Civil
Carlos Zanuy, Gonzalo S. D. Ulzurrun
ENGINEERING STRUCTURES
(2020)
Article
Chemistry, Multidisciplinary
Carlos Zanuy, Gonzalo S. D. Ulzurrun
APPLIED SCIENCES-BASEL
(2020)
Article
Chemistry, Physical
Carlos Zanuy, Pedro Javier Irache, Alejandro Garcia-Sainz
Summary: The use of high-performance fiber-reinforced concrete (HPFRC) to strengthen reinforced concrete structures (RC) has significantly increased in recent years, resulting in improved serviceability and strength. Experimental analysis shows that RC-HPFRC has higher stiffness, first cracking strength, and reduced crack widths and deformations compared to companion unstrengthened RC. The influence of time-dependent shrinkage has been included in the presented approach to better understand the observed behavioral stages.
Article
Chemistry, Multidisciplinary
Carlos Lara, Peter Tanner, Carlos Zanuy, Ramon Hingorani
Summary: The assessment of existing structures requires different methods and the accuracy of information is crucial. In recent years, various studies have been conducted to develop assessment approaches compatible with Eurocodes to meet the needs of practicing engineers.
APPLIED SCIENCES-BASEL
(2021)
Article
Construction & Building Technology
Carlos Zanuy, Alejandro Garcia-Sainz
Summary: One of the most hazardous consequences of impacts on concrete structures is the high tendency to develop shear or punching failures, with potential debris generation and associated flying fragments. Strengthening concrete structures with a thin bottom layer of high performance fiber-reinforced cement composites (HPFRCCs) can reduce such hazards. Experimental results showed that the HPFRCC layer can activate a membrane-type resisting mechanism, which can retain potentially falling generated fragments and improve the carrying capacity.
STRUCTURAL ENGINEERING INTERNATIONAL
(2023)
Article
Engineering, Civil
Carlos Zanuy, Elena Pilar Martinez, Ramon M. Merino, Jose M. Simon-Talero, Carlos Bajo
Summary: This paper presents an experimental study on the shear-lag effect in reinforced concrete T-beams under different load types. The results show that the behavior of concrete, especially cracking, affects the intensity of shear lag. The strain distribution within the top slab of the T-sections varies longitudinally for each cross-section.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Civil
Carlos Zanuy, Gonzalo S. D. Ulzurrun, Manfred Curbach
Summary: This study presents a new experimental method based on digital image correlation (DIC) to accurately estimate the inertia forces and analyze the impact response of reinforced concrete (RC) structures. By analyzing the time-dependent evolution of shear forces and bending moments, the impact behavior of RC beams strengthened with high-performance fiber-reinforced cement composite (HPFRCC) is examined. The implemented DIC-based methodology allows understanding the critical instants of shear cracking and presents a shear strength model for estimating the capacity of RC-HPFRCC elements.
ENGINEERING STRUCTURES
(2022)
Editorial Material
Chemistry, Physical
Carlos Zanuy
Article
Construction & Building Technology
Maria Carmen Beteta, Luis Albajar, Carlos Zanuy, Miguel Estaun
Summary: This paper presents an improved method for structural analysis of continuous precast bridges and verifies it through comparison with existing methods. The results demonstrate that the proposed method accurately calculates both stress distribution and delayed curvatures, making it applicable to various types of continuous bridges with staged construction.
INFORMES DE LA CONSTRUCCION
(2022)
Proceedings Paper
Construction & Building Technology
C. Zanuy, G. S. D. Ulzurrun, I. M. Diaz
FIBRE CONCRETE 2019
(2019)
Proceedings Paper
Construction & Building Technology
Carlos Zanuy, Gonzalo S. D. Ulzurrun
STRAIN-HARDENING CEMENT-BASED COMPOSITES
(2018)
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)
