Article
Engineering, Civil
Jianwei Zhang, Juan Liu, Xiangyu Li, Wanlin Cao, Zeqiao Chen
Summary: This paper proposes an innovative column reinforced with ultrahigh-strength steel bars, showing better residual displacement performance and mitigated concrete damage under cyclic loading. The increase in UHS reinforcement area proportion through equal area design helps improve column performance.
Article
Construction & Building Technology
Jianwei Zhang, Juan Liu, Deli Zhang, Xuanming Huang
Summary: The study designed and tested high-performance structures using high-strength reinforcement, and various reinforcement configurations were used to improve their seismic performance and reparability. The results showed that using UHS reinforcement in vertical components reduces damage concentration and controls the residual drift growth rate, enhancing the reparability of the structure.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Construction & Building Technology
Jun Zhao, Yibo Jiang, Xiaopeng Li
Summary: In this study, flexural tests were conducted on twelve concrete beams reinforced with high-strength steel bars to investigate the flexural behavior after exposure to elevated temperatures. The results showed that the flexural capacities decreased significantly when the exposure temperatures exceeded 800 degrees C. The holding time of 2 hours resulted in the most significant decrease in flexural capacities. The number of heating sides had no obvious effects on the load-deflection response of the specimens.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Xueyu Xiong, Yang Zhang, Ju Liu, Manchao He
Summary: This study investigated the bond behavior between ordinary concrete and high-strength and high-toughness steel bars with special spiral grooves. The effects of various test parameters on failure modes, bond-slip curves, bond strength, relative slip, and critical anchorage length were analyzed. The results showed that increasing cover thickness and end-anchorage improved bond strength, and the number of spiral grooves affected the bond strength as well. The addition of stirrups improved energy absorption capacity and ductility, and models were established to accurately calculate bond-slip curves and predict different failure modes.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Engineering, Civil
Ruxing Cai, Jianwei Zhang, Yujun Liu, Xinyi Tao
Summary: This paper investigates the seismic behavior of concrete members with recycled coarse aggregates. Tests were carried out on full-scale specimens with different parameters. An iterative method was proposed to investigate the relationship between reinforcement slip and stress. The recycled coarse aggregate concrete columns with CFRP jacket and UHSSBs showed positive lateral stiffness and less residual drifts compared to traditional ductile columns. The proposed method can predict the experimental yield loading capacity and yield drift.
ENGINEERING STRUCTURES
(2023)
Article
Construction & Building Technology
Xiaoxu Huang, Yiqi Bei, Lili Sui, Longyuan Li, Biao Hu, Yingwu Zhou
Summary: This study focused on the safety of maximum crack width in RC beams with high-strength steel bars, and proposed an optimized design procedure to control the crack width for reliability level. Compared with low-strength steel bars, high-strength ones require a relatively small steel ratio while maintaining equivalent bearing capacity and crack width safety level, demonstrating the economic advantages of high-strength steel bars through reasonable design.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Engineering, Civil
S. H. Chu, C. Unluer, D. Y. Yoo, L. Sneed, A. K. H. Kwan
Summary: The bond of steel reinforcing bars is crucial for the structural integrity of reinforced concrete, and can be improved by including fibers and using self-prestressing. This research combined self-prestressed fiber reinforced concrete (SP-FRC) and hybrid steel fiber reinforced concrete (HSFRC), resulting in bio-inspired self-prestressed hybrid steel fiber reinforced concrete (SP-HSFRC). Pull-out tests were conducted to study the bond performance of steel reinforcing bars, and analytical models were established to calculate bond parameters based on a hybrid fiber factor. A new bond model was developed for realistic bond-slip analysis, and it showed good agreement with experimental results. The improved bond was proven to effectively control cracks in HSFRC reinforced with steel bars.
ENGINEERING STRUCTURES
(2023)
Article
Construction & Building Technology
Jianwei Zhang, Juan Liu, Xiangyu Li, Wanlin Cao
Summary: The study found that high-strength concrete shear walls with high-strength steel reinforcement exhibit stable performance, with acceptable crack widths and residual deformations before reaching 1% lateral drift. The addition of steel fibers can reduce crack width, limit shear crack development, and increase flexibility deformation, thus improving deformation capacity.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Construction & Building Technology
Mei-Ling Zhuang, Chuanzhi Sun, Bo Dong
Summary: This article investigates the seismic performance of HTRB630 high-strength steel bars and HRB400 steel bars in reinforced concrete columns through experimental and numerical studies. It is found that HTRB630 high-strength steel bars can achieve good seismic performance under reasonable reinforcements, with high accuracy in numerical simulations.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Engineering, Civil
Yang Zhang, Xueyu Xiong, Yuhang Liang, Manchao He
Summary: The flexural behavior of high-strength and high-toughness (HSHT) reinforced concrete beams with negative Poisson's ratio and special spiral grooves on the surface was studied. Different parameters, such as the reinforcement ratio, compressive strength of concrete, loading mode, the number of HSHT steel bars in hybrid reinforcement, and longitudinal steel bars type, were investigated on their effects on failure modes, crack patterns, flexural stiffness, flexural strength, ductility, and energy absorption capacity. The results showed that the beams reinforced with HSHT steel bars exhibited superior crack width control ability and higher residual strength. The proposed flexural strength model accurately calculated the flexural strength of concrete beams reinforced with HSHT steel bars.
ENGINEERING STRUCTURES
(2023)
Article
Mechanics
Seyyed-Asgar Hosseini, Mahdi Nematzadeh, Carlos Chastre
Summary: In this study, the shear performance of FRP bar-reinforced concrete beams containing steel fibers and crumb tire rubber was evaluated, and a model and empirical equation were proposed to predict their shear capacity. The proposed equation showed more accurate results compared to existing shear strength prediction equations for beams with FRP reinforcing bars.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Civil
Basil Ibrahim, Salaheldin Mousa, Hamdy M. Mohamed, Brahim Benmokrane
Summary: This study investigated the cyclic behavior of glass-FRP reinforced precast high-strength concrete tunnel lining segments. The experimental findings revealed that the GFRP-reinforced HSC PCTL segments exhibited stable hysteretic response until failure. The results showed that the GFRP-reinforced HSC PCTL segments were able to achieve adequate ductility indexes as well as deformability limits.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Lei Wang, Langbo Fan, Feng Fu, Zhaoping Song
Summary: A bending test was conducted to study the crack development of composite steel-FRP rebar reinforced high strength concrete beams. A new formula was established to accurately predict the maximum crack width of SFCB reinforced concrete beams.
Article
Chemistry, Physical
Jun Zhao, Xin Luo, Zike Wang, Shuaikai Feng, Xinglong Gong, Eskinder Desta Shumuye
Summary: The study found that CFRP bars have a higher bond strength retention rate compared to steel bars in the residual section, but the residual bond strength and retention rate decrease with an increase in bond length and diameter. GFRP bars exhibit a higher bond strength retention rate compared to CFRP bars, but also decrease with increased bond length and diameter. The bond strength retention rate of steel strands was found to be lower than CFRP and GFRP bars.
Article
Construction & Building Technology
Nelly Majain, Ahmad Baharuddin Abd Rahman, Azlan Adnan, Roslli Noor Mohamed
Summary: The experimental results showed that in Self-Compacting Concrete (SCC) reinforced with steel fibres, the size of rebars and thickness of concrete cover did not affect the mode of failures, while the addition of steel fibres improved the bond ductility and altered the failure mode.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
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)