Article
Engineering, Civil
Lampros N. Koutas, Dionysios A. Bournas
Summary: The study showed that using TRM layers substantially increases the flexural capacity of two-way RC slabs with cut openings and restores their original load-bearing capacity. Analysis of different parameters can help understand the effects on flexural capacity, post-yielding stiffness, and load resistance at the serviceability limit state.
JOURNAL OF COMPOSITES FOR CONSTRUCTION
(2021)
Article
Construction & Building Technology
Zhi-qiang Li, Wei Hou, Guan Lin
Summary: This study investigated the flexural behavior of reinforced concrete beams strengthened with BFRP or HSS bars, finding that BFRP bars dominated in the failure of beams while HSS bars significantly improved flexural capacity due to their high stiffness and strength. Comparisons between ECC and polymer mortar matrices showed that ECC resulted in larger enhancements in load capacities, confirming the excellent strain compatibility of BFRP bars and ECC matrix. Additionally, a flexural theoretical analysis was proposed and verified through experimental results.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Zhifang Dong, Mingke Deng, Jie Dai, Shifei Song
Summary: This study investigated the effects of short fiber improved matrix and reinforcing ratio on the flexural behavior of RC slabs, finding that short PVA fibers can significantly increase the cracking capacity of RC slabs, and the flexural capacity of strengthened slabs increases with the reinforcing ratio of textiles. The analytical model based on strain compatibility and force equilibrium showed good agreement with experimental results.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Chemistry, Physical
Hyeong-Yeol Kim, Young-Jun You, Gum-Sung Ryu
Summary: This paper presents a new method using textile-reinforced concrete (TRC) for strengthening structurally deficient or damaged reinforced concrete (RC) structures. The performance of TRC-strengthened RC slabs with different lap-splice lengths was tested, and the impact of textile lap-splicing on the ultimate load-carrying capacity was evaluated.
Article
Engineering, Civil
Zongcai Deng, Qian Xia, Minggao Gong, Junlin Xu
Summary: Textile reinforced mortar (TRM) strengthening improves the anti-aging performance of reinforced concrete (RC) slabs and addresses rust issues and bending performance. Adding interface agents enhances the adhesion between TRM and the original RC slab, preventing crack formation at the interface. TRM strengthening significantly increases the flexural capacity and bending deformation capacity of the two-way RC slabs.
KSCE JOURNAL OF CIVIL ENGINEERING
(2023)
Article
Engineering, Civil
Mesfer M. Al-Zahrani, Muhammad Kalimur Rahman, Mohammed Fasil, Sami Al-Abduljabbar, Antonio Nanni, Mohammed A. Al-Osta, Syed Khaja Najamuddin, Husain J. Al-Gahtani
Summary: This study investigated the punching shear capacity of slabs-on-ground reinforced with GFRP bars under concentrated loads. A total of 12 slabs with different reinforcement configurations were tested and the load-carrying capacities of GFRP bar-reinforced slabs were compared with steel-reinforced slabs. The study presented crack patterns, failure modes, load-deflection response, and proposed an empirical equation to predict the punching shear capacity of GFRP bar-reinforced slabs-on-ground.
ENGINEERING STRUCTURES
(2023)
Article
Mechanics
Omar Aljidda, Ahmed El Refai, Wael Alnahhal
Summary: This paper presents the results of a study on the flexural behavior of corroded reinforced concrete slabs strengthened with near-surface mounted fiber-reinforced polymer (NSM-FRP) bars. The test parameters included the number and type of NSM-FRP bars, as well as the mass loss in steel rebars due to corrosion. The strengthened slabs showed improved load-carrying capacity and ductility.
COMPOSITE STRUCTURES
(2023)
Article
Construction & Building Technology
Reza Hassanli, Allan Manalo, Davoud Vafaei, Mohammad Yekrangnia, Mohamed Elchalakani, Martin Noel
Summary: This paper investigated the cyclic behavior of glass fiber-reinforced polymer (GFRP) reinforced concrete (GFRP-RC) slabs incorporating synthetic fibers. The study aimed to improve the performance of GFRP-RC slabs at both serviceability and ultimate limit states. The results showed that the fibers had a more pronounced effect on GFRP-RC slabs compared to steel-RC slabs, reducing crack widths and deflections and enhancing energy absorption.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Zhaoyao Wang, Xingwen Liang, Ying Wang, Tianwen Zhai
Summary: In this study, a steel-PVA hybrid fiber reinforced cementitious composite (HFRCC) permanent formwork was proposed, which has significant implications for optimizing the construction process.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2022)
Article
Construction & Building Technology
Weidong He, Xin Wang, Lining Ding, Zhishen Wu
Summary: This study compares the flexural behavior of one-way RC slabs strengthened with different techniques, revealing that the CRM technique is more effective and cost-efficient in improving the performance and ultimate behavior of the slabs. Additionally, prestressing in the CRM technique can further enhance the cracking load and flexural stiffness of the strengthened slabs.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Engineering, Multidisciplinary
Rajai Z. Al-Rousan
Summary: The effectiveness of utilizing CFRP ropes in restoring the mechanical performance of heat-damaged RC slabs was studied using anchored and un-anchored techniques. The results showed that anchoring the NSM CFRP can efficiently rehabilitate the heat-damaged slabs, improving their flexural behavior, toughness, and load capacity, while decreasing displacement ductility.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Engineering, Civil
M. Qasim, C. K. Lee, Y. X. Zhang
Summary: The study proposes using steel and polyvinyl-alcohol hybrid fibre reinforced engineered cementitious composite (SPH-ECC) to strengthen reinforced concrete (RC) beams. The effectiveness of the strengthening was investigated through experimental and numerical studies. The flexural behaviors of both strengthened and unstrengthened beams were studied, and the results showed that the flexural strength and interfacial bond-slip behaviors were dependent on the strengthening configuration used.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Zaiyu Zhang, Xiaohong Wu, Jinghua Zhang, Qing Sun, Penggang Tian, Gaoxing Hu
Summary: Through numerical analysis, the bearing mechanism and design formula for GFRP reinforced concrete beams with CFRP grid-reinforced ECC were studied. Refined FE models were established and verified by comparing with experimental results. The mechanical behaviors of GFRP bars, steel bars, CFRP grids, concrete, and ECC were analyzed in depth. The effects of key parameters on the flexural behavior of the hybrid beam were investigated and a new formula for flexural capacity was proposed and verified.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Hamza M. Y. Ali, M. Neaz Sheikh, Muhammad N. S. Hadi
Summary: This paper proposes an innovative anchoring system, NLUD technique, for NSM strengthening of RC beams, which can effectively prevent the debonding failure of the composite materials in the strengthened RC beams.
Article
Mechanics
Yazan Alhoubi, Ahmed El Refai, Farid Abed, Tamer El-Maaddawy, Noor Tello
Summary: This study investigates the effectiveness of using fabric-reinforced cementitious matrix (FRCM) systems in repairing pre-damaged reinforced concrete (RC) square columns. The results show that confining the pre-damaged columns with PBO-FRCM systems can enhance their load-carrying capacity and ductility.
COMPOSITE STRUCTURES
(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)