Article
Engineering, Geological
Yutao Pang, Yixian Sun, Jian Zhong
Summary: This paper utilized a seismic resilience-based evaluation method to provide optimal design for SMA-restrained RTSB, defining a new index of seismic resilience and proposing quantile regression to improve seismic demand dispersions estimation. The study compared the seismic performance of highway bridges isolated with SMA-restrained RTSB with different sliding bearings and conducted a parametric study to obtain the optimal design based on Gaussian Process Regression model and genetic method. It concluded that the mechanical properties of SMA-restrained RTSB significantly impact the seismic resilience of highway bridges.
BULLETIN OF EARTHQUAKE ENGINEERING
(2021)
Article
Instruments & Instrumentation
Zhuang Peng, Wang Wei, Yibo Li, Han Miao
Summary: The new composite isolator SCDFPB, combining DFPB with SMA cables, adapts well to multi-level earthquake intensities. Research on hysteretic behavior and numerical simulation of SCDFPB was conducted, with experimental results validating its performance.
SMART MATERIALS AND STRUCTURES
(2021)
Article
Construction & Building Technology
Fengyu Xu, Suya Dai, Quansheng Jiang, Xingsong Wang
Summary: The research designed a cable repair climbing robot system based on independent quadrilateral suspension, which can automatically perform cable testing, cleaning, and repairs. Experimental results show that the robot can climb quickly, carry loads, overcome obstacles, and has good automatic repair capabilities.
AUTOMATION IN CONSTRUCTION
(2021)
Article
Engineering, Civil
Haiqiang Zhong, Junjun Guo, Wancheng Yuan, Zhiqiang Wang, Xinzhi Dang, Xiaowei Deng
Summary: Previous research focused on improving single components of highway bridges, but this may lead to high costs and increased seismic demand on other structural members. This study proposes a novel multi-level aseismic bridge system that combines cable-sliding friction aseismic bearings and dissipative controlled rocking piers to enhance the bridge performance.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Mechanical
Houjun Kang, Yunpeng Cai, Yunyue Cong, Xiaoyang Su, Guirong Yan
Summary: This study develops a nonlinear dynamic model of a shallow arch with multiple cables to describe a long-span cable-stayed bridge. The in-plane modal internal resonance between the first mode of the shallow arch and the first mode of the cable is investigated under primary resonance and subharmonic resonance, considering the veering phenomenon of cable-stayed bridges. Modulation equations of the dynamic system are obtained using Galerkin discretization and the multiple scales method, and the equilibrium solution of the modulation equations is obtained using the Newton-Raphson method. The accuracy of the perturbation analysis is verified by directly solving the ordinary differential equations using the Runge-Kutta method.
NONLINEAR DYNAMICS
(2023)
Article
Engineering, Civil
Jiang Yi, Jianzhong Li
Summary: A practical and reliable model for stay cables in cable-stayed bridges under seismic actions is proposed in this study, which shows better accuracy compared to the conventional method in structural response prediction. The importance of applying the proposed model in seismic design of cable-stayed bridges is highlighted based on the results.
Article
Computer Science, Interdisciplinary Applications
Nizar Bel Hadj Ali, Ziyun Kan, Haijun Peng, Landolf Rhode-Barbarigos
Summary: This paper investigates the importance of considering sliding-induced friction in the static analysis of tensile structures and proposes an improved approach. Through several examples, it demonstrates the significant impact of friction on the mechanical behavior of structures, and shows that the proposed formulations do not affect the computational time for static analyses.
ENGINEERING WITH COMPUTERS
(2021)
Article
Geochemistry & Geophysics
Keisuke Ariyoshi
Summary: The paper explores the migration of slow earthquakes on natural faults and presents quantitative relationships and characteristic slip distances based on simulation and observational results. It also discusses the friction and stress changes associated with these phenomena.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2022)
Article
Engineering, Civil
Andrea Franchini, Wendel Sebastian, Dina D'Ayala
Summary: This paper proposes a probabilistic performance-based design strategy for cable-stayed bridges, using parameterised fragility functions for sensitivity analysis and optimisation. The proposed strategy improves the ability to predict dynamic behaviour and optimises the probability of seismic damage and repair cost.
ENGINEERING STRUCTURES
(2022)
Article
Engineering, Multidisciplinary
Khawaja Ali, Hiroshi Katsuchi, Hitoshi Yamada
Summary: This study compares cable-stayed and extradosed bridges based on the safety assessment of their stay cables, revealing different structural redundancies for different safety factors under the same loading conditions. It shows that there is a significant increase in structural redundancy with an incremental increase in the safety factors of stay cables.
Article
Engineering, Civil
Shengbo Chai, Ruilin Zhang, Xiulan Wang, Kaijie Huang
Summary: In order to improve the structural stiffness of multitower cable-stayed bridges, a new analysis theory and layout scheme of crossed cables are proposed. The analysis demonstrates that the area ratio of crossed cables is equal to the square of the cable length when the restraint stiffness is maximum. An asymmetrical arrangement of crossed cables is found to have better mechanical properties and can reduce tower displacement and bending moment, and increase the vertical frequency of the bridge. The asymmetrical arrangement significantly improves the restraint of crossed cables to the middle tower, enhancing the structural stiffness and stress distribution of the bridge.
JOURNAL OF BRIDGE ENGINEERING
(2023)
Article
Engineering, Civil
V Ozsarac, M. Furinghetti, R. Monteiro
Summary: The lack of knowledge regarding the key features of structural components poses a challenge in the seismic risk assessment of ageing existing bridge structures. The mechanical properties of these components can change over time, resulting in considerable differences in recommended modelling parameters and significantly altering the seismic response and risk estimates.
ENGINEERING STRUCTURES
(2023)
Article
Engineering, Civil
Zeqiang Wang, Qinghua Han, Yan Lu, Yang Hu
Summary: This study investigates the factors affecting the anti-slip performance of cable clamps through experiments and numerical simulations. The results indicate that the locked coil cable clamp demonstrates the best anti-slip performance, while the PE sheathed cable clamp performs the worst. The type of clamp cover, bolt preload, cable tension, groove surface treatment, and outer sheath thickness also influence the anti-slip performance. The anti-slip capacity of the cable clamp is positively correlated with normal pressure, contact closeness, and friction coefficient.
Article
Construction & Building Technology
Jilin Hou, Chao Li, Lukasz Jankowski, Yongkang Shi, Li Su, Sheng Yu, Tiesuo Geng
Summary: This study proposed a method for identifying cable damage by adding virtual supports to each cable, thus making the relationship between cable forces and natural frequency linear. The effectiveness of the method was verified experimentally, confirming that the natural frequency of the isolated cable substructure is a highly sensitive damage indicator.
STRUCTURAL CONTROL & HEALTH MONITORING
(2021)
Article
Engineering, Civil
Ying Chang, Wei Luo, Lin Zhao, Yiqing Zou, Qingkuan Liu, Yaojun Ge
Summary: Rain-wind-induced vibrations (RWIVs) in cable-stayed bridges can be effectively suppressed by hydrophobic coating, which reduces wind loads and improves structural responses. Optimization design of two cable-stayed bridges resulted in reduced tower responses, smaller tower and foundation sizes, and significant cost savings.
JOURNAL OF WIND ENGINEERING AND INDUSTRIAL AERODYNAMICS
(2023)
