Article
Chemistry, Physical
Tiejiong Lou, Han Hu, Miao Pang
Summary: This study evaluates the flexural performance of prestressed concrete beams with external carbon fiber-reinforced polymer (CFRP) tendons, focusing on tendon-related variables. The finite element analysis (FEA) method is verified and a numerical parametric analysis is conducted. Four tendon-related variables are considered: area, initial prestress, depth, and elastic modulus. The analysis reveals that flexural ductility decreases with increasing tendon area, initial prestress, or elastic modulus, but is insensitive to tendon depth. The ultimate tendon stress increment (& UDelta;& sigma;(p)) is influenced by all investigated variables. The proposed analytical model for estimating flexural strength shows good agreement with FEA results.
Article
Engineering, Civil
Qian-Qian Yu, Xiang-Lin Gu, Yan-Hong Zeng, Wei-Ping Zhang
Summary: This paper presents an experimental and theoretical analysis on corroded prestressing tendons and concrete beams. The study found that the corrosion of prestressing tendons significantly degraded their deformability and strength, leading to a deteriorated flexural bearing capacity of the beams.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Civil
Changyuan Liu, Xin Wang, Jianzhe Shi, Lulu Liu, Zhishen Wu
Summary: This study investigates the flexural behavior of RC beams strengthened with prestressed basalt FRP (BFRP) laminates, comparing them to traditional carbon FRP (CFRP) laminates. It was found that BFRP offers a larger failure strain but lower modulus than CFRP, making it a cost-effective and suitable option for strengthening existing beams. Factors such as FRP type, laminate thickness, strengthening method, reinforcement ratio, prestressing level, and adhesive were studied, with BFRP showing better crack control and ductility compared to CFRP under the same conditions. Additionally, a higher prestressing level improved BFRP utilization and the prestressing method effectively lowered the reinforcement ratio, while the bonded system had better crack control and strength utilization than the unbonded system.
ENGINEERING STRUCTURES
(2021)
Article
Polymer Science
Xiang Li, Shuaiyu Zhao, Xinmiao Meng, Xiaodong Ji
Summary: The use of bamboo fiber-reinforced polymer tendon offers a solution to the high cost and carbon emission issues associated with steel in engineering structures. Through thin-shell and thick-shell models, the tension capacity and mechanical behavior of the BFRP tendon were analyzed, confirming its reliability and ability to fully utilize the advantages of bamboo fiber as a reinforcement material.
Article
Mechanics
Yijia Sun, Tao Wu, Xi Liu, Binfeng Zhang
Summary: This paper presents design recommendations for FRP-UPC beams at ultimate limit state, including strain and stress conditions for balanced failure modes, a failure mode discrimination method, and limits for bonded and unbonded FRP reinforcements. A unified flexural capacity model is proposed and verified through comparison with measured results. Parametric analysis reveals the influence of reinforcement amount on beam performance.
COMPOSITE STRUCTURES
(2022)
Article
Engineering, Civil
Eunsoo Choi, Alireza Ostadrahimi, Woo Jin Kim, Junwon Seo
Summary: This study investigates the stress recovery effect induced in Fe-based SMA and the prestressing effect of embedded Fe-SMA wires on the flexural behavior of mortar beams. By conducting three-point bending tests under prestressing force, the bending stress in Fe-SMA reinforced specimens is analyzed, leading to the discovery that prestressing force can significantly increase fracture deformation capacity and reduce stress in mortar beams.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Multidisciplinary
Xiangong Zhou, Chenglin Fu, Wei Hou, Haofei Guo, Wenhang Hu
Summary: This study presents the calculation of total prebending moment of external prestressing with different tendon profiles, taking into account the external prestressing loss and original internal prestressing loss in both theoretical and finite element methods. By comparing the reinforcement efficiency under different external tendon profiles, the study determines the reinforcement scheme based on local damage and overall damage of the beam, effectively reducing reinforcement costs. The theoretical method shows similar results to the finite element method, providing a quick evaluation of reinforcement effects using different tendon profiles in engineering.
TEHNICKI VJESNIK-TECHNICAL GAZETTE
(2021)
Article
Chemistry, Physical
Ganesh Radhakrishnan, Daniel Breaz, Sami Sulaiman Al Khusaibi, Amjad Juma Al Subaihi, Al Azhar Zahir Al Ismaili, AlSalt Malik AlMaani, Kadhavoor R. Karthikeyan
Summary: In recent times, hollow sections have been increasingly used in construction and machine applications due to their lightweight and high specific strength. This investigation focused on the flexural capability of aluminium hollow tubes with square cross-sections and studied the influence of stress concentration on their flexural behavior. Different stress concentrations, such as circular holes, multiple circular holes, square holes, and perforations, were considered. Three-point bending tests were conducted on specimens with various support spans, and the output measures analysed included maximum bending load, deflection, and flexural stiffness. The findings suggest that AHTs with circular holes, multiple circular holes, and perforations exhibit better flexural stability compared to other AHTs.
Article
Acoustics
Xin Zhang, Hao Xu, Maosen Cao, Dragoslav Sumarac, Ye Lu, Jiayi Peng
Summary: This study proposes an analytical model to enhance the accuracy and efficiency of vibration analysis and health monitoring of cable structures under complex engineering environments. The model considers sags, inclined angles, and non-negligible bending stiffness and is validated through comparisons with existing methods.
JOURNAL OF SOUND AND VIBRATION
(2023)
Article
Engineering, Aerospace
Zhendong Liu, Xitao Zheng, Wenjing Fan, Fei Wang, Sohail Ahmed, Leilei Yan
Summary: This study proposed a method to reduce processing-induced deformation by introducing prestress to a single layer or part of the layers. Experimental results showed a linear relationship between prestress level and final curing deformation, providing a convenient way to calculate the prestress level that can fully counteract the curing deformation.
CHINESE JOURNAL OF AERONAUTICS
(2022)
Article
Chemistry, Multidisciplinary
Li Jia, Zhi Fang, Zhengmeng Huang, Kypros Pilakoutas, Qiwu Wang, Xingyu Tan
Summary: This study investigated the flexural behavior of UHPC beams prestressed with external CFRP tendons. Factors such as effective prestressing stress, partial prestressing ratio, deviated angle, and loading condition were analyzed. Results showed that internal steel reinforcement significantly improved flexural capacity and deformation ability in a ductile manner.
APPLIED SCIENCES-BASEL
(2021)
Article
Engineering, Geological
Shubo Zhang, Changsheng Wang, Gang Wang, Xin Zheng, Hui Guan, Tingfang Liu, Feng Xu
Summary: This study investigates the shear behaviors of jointed rocks reinforced by BFRP bars and SFCBs. The results show that BFRP bolted specimens have lower shear stiffness but higher residual shear strength compared to steel bars and SFCBs. The peak shear strength is highest for SFCB-reinforced jointed rock, and the residual strength is similar to steel bar bolted specimens. The energy absorption is comparable between BFRP and steel bolted specimens.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Le Teng, Rongling Zhang, Kamal Henri Khayat
Summary: The study aimed to develop a model for predicting the deflection of cracked reinforced ultra-high performance concrete (R-UHPC) beams, validated through finite element analysis (FEA) and comparison with experimental results, with relative error controlled within 15%. The model demonstrates practicality and accuracy, offering a simpler and more time-efficient alternative compared to conventional ACI code and FEA methods.
Article
Construction & Building Technology
Zhou Junlong, Li Dongsheng
Summary: This paper proposes a semi-theoretical empirical formula to predict the shear-flexural cracking strength of an RC beam enhanced with the external vertical prestressing rebar (EVPR) technique. Nonlinear finite element models (FEM) were utilized to analyze the impact of key parameters on the cracking strength. Results indicate a linear relationship between cracking strength and concrete tensile strength and initial pulling force, while longitudinal tension rebars and EVPR spacing also significantly affect the cracking strength.
ADVANCES IN STRUCTURAL ENGINEERING
(2022)
Article
Mechanics
Jianzhe Shi, Xin Wang, Zhishen Wu, Zhongguo Zhu
Summary: This paper focuses on the optimization of anchorage and deviator for concrete beams prestressed with external BFRP tendons. The proposed CW anchorage achieved an anchor efficiency factor of 85%. The recommended lower limit value of R-d/R-p is 200, and the upper limit value of theta is 5 degrees. The RC beam prestressed with external BFRP tendons exhibited enhanced flexural behaviors compared with the non-prestressed RC beam, and the tendons remained intact at the anchor zones and deviators.
COMPOSITE STRUCTURES
(2022)
Article
Materials Science, Composites
Xing Zhao, Xin Wang, Zhishen Wu, Thomas Keller, Anastasios P. Vassilopoulos
POLYMER COMPOSITES
(2019)
Article
Mechanics
Bo Feng, Xin Wang, Zhishen Wu
COMPOSITE STRUCTURES
(2019)
Article
Construction & Building Technology
Lining Ding, Jianzhe Shi, Xin Wang, Ying Liu, Yundong Jin, Zhishen Wu
STRUCTURAL CONCRETE
(2020)
Article
Construction & Building Technology
Xin Wang, Xiaofei Zhang, Lining Ding, Jie Tang, Zhishen Wu
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Engineering, Civil
Xin Wang, Jingyang Zhou, Lining Ding, Jinhui Song, Zhishen Wu
JOURNAL OF BRIDGE ENGINEERING
(2020)
Article
Materials Science, Composites
Xin Wang, Xing Zhao, Siqi Chen, Zhishen Wu
JOURNAL OF COMPOSITE MATERIALS
(2020)
Article
Mechanics
Yaqiang Yang, Xin Wang, Zhishen Wu
COMPOSITE STRUCTURES
(2020)
Article
Mechanics
Lulu Liu, Xin Wang, Zhishen Wu, Thomas Keller
COMPOSITE STRUCTURES
(2020)
Article
Materials Science, Composites
Zheqi Peng, Xin Wang, Zhishen Wu
COMPOSITES SCIENCE AND TECHNOLOGY
(2020)
Article
Construction & Building Technology
Xing Zhao, Xin Wang, Zhishen Wu, Jin Wu
CONSTRUCTION AND BUILDING MATERIALS
(2020)
Article
Construction & Building Technology
Xia Liu, Xin Wang, Kangyu Xie, Zhishen Wu, Feng Li
INTERNATIONAL JOURNAL OF CONCRETE STRUCTURES AND MATERIALS
(2020)
Article
Mechanics
Weidong He, Xin Wang, Zhishen Wu
COMPOSITE STRUCTURES
(2020)
Article
Engineering, Civil
Yaqiang Yang, Xin Wang, Zhishen Wu
Article
Construction & Building Technology
Jingyang Zhou, Xin Wang, Lining Ding, Shui Liu, Zhishen Wu
Summary: A dispersed-tendon cable anchor system (CAS) was developed to increase the anchoring efficiency of large-diameter BFRP cables. Numerical evaluations and testing results showed that the CAS exhibited superior anchor behavior compared to the parallel-tendon CAS. The use of variable-stiffness anchoring method helped avoid shear stress concentration in the cable.
Article
Construction & Building Technology
Xia Liu, Xin Wang, Tan Yang, Zhishen Wu
Summary: This study conducted double shear tests on insulated PCSP specimens reinforced with BFRP connectors, and analyzed the effects of connector diameter, insulation thickness, installation angle, layout spacing, etc. on shear capacity. The shear capacity model proposed in this paper provides a favorable design option for insulated PCSP systems.
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)