Article
Engineering, Civil
Yue Zheng, Honglei Wu, Xin You, Hao Xie
Summary: This study proposes a general framework for progressive seismic collapse analysis of reinforced concrete bridges, and validates the efficiency and reliability of this framework through shake table tests and updating of finite element models.
Article
Engineering, Multidisciplinary
Kaiqi Lin, You-Lin Xu, Xinzheng Lu, Zhongguo Guan, Jianzhong Li
Summary: Accurate finite element models are crucial in the design and maintenance of long-span bridges, and updating the model is necessary to better represent the real situation. This study proposes a time history analysis-based nonlinear finite element model updating method, which has been validated to improve accuracy.
STRUCTURAL HEALTH MONITORING-AN INTERNATIONAL JOURNAL
(2021)
Article
Construction & Building Technology
Shiqiang Qin, Yonggang Yuan, Yaowei Gan, Qiuping Wang
Summary: This study proposes a generally applicable improvement strategy for metaheuristic algorithms in finite element model updating, introducing random crossover and mutation operators to improve accuracy and stability. The effectiveness of the strategy was tested with benchmark functions and simulations of a space truss structure, as well as the updating of a hybrid girder cable-stayed bridge. The results show improved accuracy and stability, making it suitable for baseline FE models of bridges.
Review
Engineering, Multidisciplinary
Lixiao Zhang, Guoyang Qiu, Zhishou Chen
Summary: Cables are crucial components in cable-stayed bridges, and monitoring their tension is essential for ensuring bridge safety. This paper examines both traditional and innovative methods for monitoring cable force, including recent advancements in intelligent monitoring techniques. The conclusion provides insight for the future development of cable-stayed bridges.
Article
Chemistry, Multidisciplinary
Jaegyun Park, Jaeyong Yoon, Chulho Park, Jungwhee Lee
Summary: As the demand and construction of cable-stayed bridges have increased, research on the safety of cable-stayed bridges in the event of natural disasters such as fires and explosions is actively being conducted. This study evaluates the usability of the cable-stayed bridge in the event of cable damage and assesses its seismic performance and the impact of the damage through numerical analysis.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Civil
Kaiqi Lin, You-Lin Xu, Xinzheng Lu, Zhongguo Guan, Jianzhong Li
Summary: The study proposes a collapse prognosis method for long-span cable-stayed bridges under strong earthquakes, which accurately evaluates the seismic performance and failure mechanisms.
EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS
(2021)
Article
Engineering, Civil
Kai Qiu, Shuchen Li, Huahuai Sun, Youzhi Wang, Bin Lv
Summary: In this work, an innovative two-phase model updating technique was developed to accurately evaluate a long-service-life cable-stayed bridge strengthening scheme. The first phase involved sensitivity analysis to determine the main updating parameters, followed by a multiobjective optimization problem solved using an improved genetic algorithm (GA). In the second phase, the ELECTRE-III method was used to rank the Pareto front and determine the final updating results.
Article
Engineering, Civil
Shiqiang Qin, Shuo Han, Shiwei Li
Summary: This study presents the in-situ testing and finite element model updating of China's first long-span bal-lastless railway cable-stayed bridge. The results show that the bridge has sufficient vertical stiffness, excellent riding comfort, and load-bearing capacity. The displacement assurance criterion performs better than displacement in updating the finite element model.
Article
Construction & Building Technology
Yanxiao Yang, Mubiao Su, Heng Liu
Summary: In the study, the effects of ambient temperature change, stiffness degradation of the main beam, and cable damage on the deflection of the main girder in a single-tower cable-stayed bridge under self-weight were investigated. The results showed that the deflection difference of the girder had obvious characteristics before and after cable damage, with a twisted distribution curve and increasing peak value. The deterioration of the girder's performance made the deflection more sensitive to cable damage. Ambient temperature change had a significant influence on the girder's deflection, but no obvious influence on the deflection difference before and after cable damage.
Article
Engineering, Civil
Hourui Duan, Hongbo Liu, Yue Sun, Hongshuai Gao
Summary: Based on the analysis of the engineering background of the cable-stayed bridge without backstays in Jinzhou Bridge, it is found that the current cable force fails to satisfy the actual requirements. Finite element models are established and modified to analyze the internal force states of the beam and tower, and determine the reasonable internal force state and corresponding cable forces.
JOURNAL OF CIVIL STRUCTURAL HEALTH MONITORING
(2023)
Article
Construction & Building Technology
Xiaoling Liu, Xiyan Yi, Bing Wang, Ying Liu
Summary: A novel method for assessing grouped cable forces using deflection data is proposed in this article, which includes establishing a simplified equation between cable forces and girder deflection, determining the threshold value of cable force change rate, and developing a condition assessment method for grouped cable forces. A case study of a real bridge validates the proposed theoretical equation and shows a decrease in the assessment scores of grouped cables over six years, reflecting the development of other component defects.
Article
Engineering, Mechanical
Houjun Kang, Xiaoyang Su, Zihao Pi
Summary: The study explores the dynamic characteristics of a multi-cable-stayed shallow-arch model of a cable-stayed bridge under internal resonance, finding that support stiffness can reduce response amplitudes by absorbing energy to some extent.
NONLINEAR DYNAMICS
(2022)
Article
Engineering, Civil
Mohammad E. Omran, Abbas H. Karani
Summary: This paper studies the performance of isolated cable-stayed bridges in case of cable loss conditions, focusing on the Bill Emerson Cable-Stayed Bridge with Roll-N-Cage (RNC) isolators. The results show that the RNC isolator with an activated buffer mechanism can effectively reduce the permanent displacement under seismic loads and provide structural stability.
Article
Engineering, Civil
Noel Soto, Clara Cid, Aitor Baldomir, Santiago Hernandez
Summary: This paper presents a methodology to optimize the cable system in cable-stayed bridges by considering the accidental breakage of one cable. A multi-model optimization strategy is proposed, and design constraints are established on both the intact and damaged models. Impact loads are applied in the damaged models to account for the dynamic effect of cable breakage. The objective is to minimize the steel volume by varying cable anchor positions, number of cables, cross-sectional areas, and prestressing forces. The approach is applied to the Queensferry Crossing Bridge, resulting in a different layout with increased cables and smaller areas, while minimizing the penalty in steel volume.
ENGINEERING STRUCTURES
(2023)
Article
Construction & Building Technology
J. Farre-Checa, S. Komarizadehasl, Haiying Ma, J. A. Lozano-Galant, J. Turmo
Summary: The construction analysis of cable-stayed bridges is crucial for ensuring the safety of such structures. This study conducted a direct simulation of the construction process using independent finite element models. The prestressing forces were modeled as imposed strains, allowing for faster simulation of the construction process.
AUTOMATION IN CONSTRUCTION
(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)