Near-fault pulse seismic ductility spectra for bridge columns based on machine learning

T Yang, X Yuan, J Zhong, W Yuan - Soil Dynamics and Earthquake …, 2023 - Elsevier
The seismic ductility spectra (SDS) method is a crucial tool to quickly evaluate the ductility
demand of bridge columns with varied constitutive models. However, conventional SDS …

Regional seismic fragility of bridge network derived by covariance matrix model of bridge portfolios

J Zhong, S Zhou, H Wang, H Hu - Engineering Structures, 2024 - Elsevier
The consequences of seismic damage to bridge portfolios are more pronounced than those
to individual bridges, leading to a greater emphasis on seismic fragility analysis of bridge …

Effect of near-fault vertical ground motions on failure mode of long-span sea-crossing cable-stayed bridges

J Zhong, W Xu, X Dang, K Wei - Ocean Engineering, 2022 - Elsevier
Existing investigations have proved that the near-fault vertical ground motion (VGM) would
have a significant effect on the seismic performance of bridge structures. This study mainly …

Uniform design–based Gaussian process regression for data-driven rapid fragility assessment of bridges

Y Pang, X Zhou, W He, J Zhong… - Journal of Structural …, 2021 - ascelibrary.org
This paper proposes a uniform design (UD)-based Gaussian process regression (GPR)
method for rapid damage assessment and fragility estimates of bridges. The core idea of the …

Probabilistic seismic demand model of UBPRC columns conditioned on Pulse-Structure parameters

J Zhong, L Shi, T Yang, X Liu, Y Wang - Engineering Structures, 2022 - Elsevier
Unbonded prestressed reinforced concrete (UBPRC) column has attracted the attention of
many researchers in bridge seismic design because of its small residual displacement …

Potential bias of conventional structural seismic fragility for bridge structures under pulse-like ground motions: Bias evaluation and strategy improvement

T Yang, Y Wei, J Zhong - Soil Dynamics and Earthquake Engineering, 2023 - Elsevier
Previous studies have highlighted the serious biases that may happen in probabilistic
structural fragility analysis (PSFA) due to the ignorance of the effect of pulse period under …

A novel structure-pulse coupled model for quantifying the column ductility demand under pulse-like GMs

J Zhong, T Yang, Y Pang, W Yuan - Journal of Earthquake …, 2022 - Taylor & Francis
ABSTRACT A novel model is constructed to investigate the coupling effect of pulse period
(Tp) and peak pulse velocity (Vp) on structural demands with the varied fundamental period …

Risk-based design and optimization of shape memory alloy restrained sliding bearings for highway bridges under near-fault ground motions

Y Pang, W He, J Zhong - Engineering Structures, 2021 - Elsevier
Abstract The Shape Memory Alloy (SMA)-restrained bearing consists of a typical sliding
bearing and SMA wires. The SMA wires are adopted to limit the excessive displacement …

Seismic fragility and resilience assessment of bridge columns with dual-replaceable composite link beam under near-fault GMs

J Zhong, X Zheng, Q Wu, L Jiang, M He, X Dang - Structures, 2023 - Elsevier
The beam-column joints of piers with reinforced concrete link beams (RCLB) are easy to be
damaged during earthquakes. Post-earthquake maintenance is very inconvenient since the …

An endurance time method-based fragility analysis framework for cable-stayed bridge systems under scour and earthquake

K Wei, H He, J Zhang, C Yang, S Qin - Ocean Engineering, 2021 - Elsevier
Seismic fragility assessment using structural dynamic analysis remains challenging for
complex systems due to the high computational demand, such as the sea-crossing cable …