Article
Materials Science, Multidisciplinary
Pengfei Ma, Jiaoli Li, Ying Zhuo, Pu Jiao, Genda Chen
Summary: The organic coating of bridge steel girders can suffer from physical scratches, corrosion, and aging due to natural weathering. The breakdown of the coating can have negative impacts on serviceability and safety if not detected in time. A hyperspectral imaging method is proposed to detect the condition of steel coatings based on coating-responsive features in reflectance spectra. Field tests on real-world bridges have shown its effectiveness in assessing coating health, locating scratches, identifying rust sources, and evaluating topcoat degradation.
Article
Engineering, Civil
Shuwen Deng, Xudong Shao, Xudong Zhao, Yang Wang, Yan Wang
Summary: This study proposed a fully precast steel-UHPC lightweight composite bridge design and developed an innovative girder-to-girder joint suitable for the bridge. Experimental and finite element analysis validation confirmed the design's rationality and performance meeting design requirements.
FRONTIERS OF STRUCTURAL AND CIVIL ENGINEERING
(2021)
Article
Engineering, Civil
Jie Fang, Tetsuya Ishida, Eissa Fathalla, Satoshi Tsuchiya
Summary: This study investigates the deterioration process and mechanism of reinforced concrete (RC) slabs in road bridges under dry and wet conditions, using full-scale superstructure of a realistic bridge. The findings reveal differences in failure mechanisms between dry and wet conditions, providing useful reference for more rational design and maintenance of RC slabs of road bridges.
ENGINEERING STRUCTURES
(2021)
Article
Construction & Building Technology
Zhou Shi, Yongcong Zhou, Zhitao Sun, Shili Yang
Summary: The fatigue performance of an orthotropic steel deck in a long-span highway suspension bridge with a wide steel-box girder was investigated. Results showed that fatigue details near the hanger side had relatively large stresses and symmetrical details were affected by deflection of the wide diaphragm. The stress-influenced surfaces were different for fatigue details due to multiple vehicle effects.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2022)
Article
Mathematics
Li Li, Yu Lu, Miaojuan Peng
Summary: The prediction of bridge service performance is crucial for maintenance, operation, and decision making. This study analyzed inspection records from Shanghai's Bridge Management System and utilized survival analysis to investigate the performance of over 40,000 main girders over 14 years. The results showed that the deterioration rate of main girders increases with age and is influenced by the position of the girder and the road grade.
Article
Engineering, Civil
Jiaming Zhang, Cunming Ma, Rong Xian, Jiankun Li, Qinfeng Li
Summary: Accurately identifying the aerodynamic loads on vehicles is crucial for assessing their driving safety on long-span bridges in strong crosswinds. Few studies have quantified both steady and unsteady crosswind loads for vehicles on wide bridge decks. This paper determined the aerodynamic coefficients and admittance functions for different types of high-sided vehicles on two wide bridge decks through wind tunnel tests. The effects of vehicle position, wind angle of attack, and bridge deck geometry on these parameters were investigated. The results showed significant variations in aerodynamic coefficients with lateral vehicle position and substantial effects of wind angle of attack on vehicles on the leeward side of the twin-box girder.
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
(2023)
Article
Engineering, Civil
Matthew C. Reichenbach, Anthony D. Battistini, Sean Donahue, Todd A. Helwig, Michael D. Engelhardt, Karl H. Frank
Summary: This paper presents the results of a full-scale laboratory study on the fatigue performance of welded cross-frame configurations and details. The study shows that commonly used details exhibit poor fatigue characteristics due to the presence of bending stresses and stress concentrations, while proposed details improve the fatigue life of cross-frame systems.
JOURNAL OF BRIDGE ENGINEERING
(2023)
Article
Engineering, Civil
Bowen Feng, Yongjian Liu, Xin Yang, Jiang Liu, Guojing Zhang, Yinping Ma
Summary: By constructing and testing a model bridge, the mechanical behavior and failure modes of curved continuous steel-concrete composite twin I-girder bridge were investigated. The study revealed that the non-uniform torsion and web distortion are characteristic mechanical behaviors of the bridge. The research contributes to a deeper understanding of the mechanical behavior of curved continuous CTIG bridges and provides a valuable experimental basis for bridge design of this type.
Article
Materials Science, Multidisciplinary
Shengwei Qin, Chenghao Zhang, Bang Zhang, Haiyang Ma, Minghao Zhao
Summary: This research studied the effects of carburizing process on the material properties and fatigue performance of 18CrNiMo7-6 gear steel. The evolution processes of hardness, microstructure, and residual stress of carburized specimens during fatigue testing were observed, and the initiation of fatigue cracks and the transformation of retained austenite were analyzed. The results showed that the fatigue strength of carburized specimens increased and then decreased with the increase of effective case depth, and the fatigue failure mode changed from surface failure to internal failure after carburizing.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Engineering, Civil
Elmira Shoushtari, M. Saiid Saiidi, Ahmad Itani, Mohamed A. Moustafa
Summary: This paper discusses the first shake table test of a steel girder bridge system constructed using accelerated bridge construction (ABC) techniques. The test aimed to evaluate the seismic performance of the bridge system and found that the ABC connections used were satisfactory.
ENGINEERING STRUCTURES
(2021)
Article
Engineering, Civil
Lijing Zeng, Wenyuan Zhang, Hongwei Li
Summary: The study applied four methods to low-cycle fatigue life prediction of steel brace, finding that the ductile damage model performed well in predicting fatigue life, while the representative strain method compensated for the limitations of the fiber model, exhibiting high accuracy and computational efficiency.
THIN-WALLED STRUCTURES
(2021)
Article
Construction & Building Technology
Jason A. Mash, Kent A. Harries, Chase Rogers
Summary: This study compares practical methods of repairing corrosion-induced section loss of steel bridge girders at their supports. Four repair strategies, including conventional bolted steel repair, encasement in conventional reinforced concrete (RC), encasement in ultra-high performance concrete (UHPC), and reinforcement with externally bonded fiber-reinforced polymer (FRP) plates and sections, are evaluated through large-scale experimental tests. The results show that conventional bolted steel repair methods are effective, while UHPC and RC encasement also perform well in certain scenarios. However, the bond between the FRP system and the damaged steel substrate is poor, making it an unsuitable repair method for this type of damage scenario.
JOURNAL OF CONSTRUCTIONAL STEEL RESEARCH
(2023)
Article
Engineering, Multidisciplinary
Ahmed A. Matloub, Youssef S. Rizk, Mona M. Fawzy, Ahmed H. Yousef
Summary: Hollow tubular flange girders (HTFG) have higher capacity and reduce carbon emissions from the steel industry compared to conventional I-sections. This paper investigates the behavior of HTFG under bending and validates the AISC design equations. The results suggest adjustments in plastic limit and torsion constant, and show a reduction in embodied carbon through material saving with HTFG.
AIN SHAMS ENGINEERING JOURNAL
(2023)
Article
Mathematics, Interdisciplinary Applications
Yuanxun Zheng, Zhanlin Cao, Pan Guo, Pu Gao, Peng Zhang
Summary: The fatigue performance of a two-way four-lane steel-concrete composite continuous beam bridge deck is studied based on the vehicle flow information of the highway within 10 years. The results show that the wheel track position has negligible effect and the thickness of the deck concrete slab is recommended to be >= 35 cm for reducing fatigue damage.
Article
Chemistry, Multidisciplinary
Jiangjiang Li, Yongjian Liu, Liang Chai, Zihan Xing, Bowen Feng, Lei Jiang
Summary: During the operational phase of a bridge, the crossbeam acts as a supporting member, maintaining the cross-sectional shape and resisting various loads. The existing research lacks consideration of the impact of main beam warping deformation on the crossbeam's internal force. This article proposes a calculation method that takes into account the influence of warping deformation, resulting in higher accuracy.
APPLIED SCIENCES-BASEL
(2023)
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)
