A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Novel fiber-based seismic response modelling and design method of partially CFST bridge piers considering local buckling effect
https://orcid.org/0000-0002-3862-2257
Abstract Considering the prohibitive computation time and convergence problems of shell-solid models in seismic analysis of partially concrete-filled steel tubular (CFST) bridge piers, a simple fiber-based nonlinear modelling method is proposed and calibrated in this study intended for large-scale seismic analyses. The local buckling effect of the outer steel tube is considered in the proposed method. By comparing the results of the numerical modelling with those from the experiments, the proposed fiber models are demonstrated to capture the hysteretic behavior of CFST piers with a comparable effectiveness but an enhanced efficiency and analysis time and effort over the shell-solid models. Based on the proposed fiber models, extensive cyclic pushover and time-history analyses are conducted to investigate the effect of critical design parameters on seismic performance of partially CFST piers. The analysis results indicate that the parameters of steel tube and infilled concrete should be properly designed in a combined way to mitigate the local buckling of the steel tube and thus improve the overall seismic performance of partially CFST piers. A novel design method using layered concrete filling is proposed for partially CFST piers, which can achieve an improved structural seismic performance. Furthermore, this method is validated to be especially efficient for seismic retrofit of existing hollow steel piers, which can significantly enhance the pier deformation capacity without imposing much extra force demands on pier foundations.
Highlights A fiber-based modelling method of thin-walled partially CFST bridge piers considering local buckling effect is proposed. The effectiveness of proposed fiber models is validated by using literature experimental results. Sensitivities of design parameters are revealed associated with seismic performance of partially CFST bridge piers. An improved design strategy is proposed for partially CFST bridge piers.
Novel fiber-based seismic response modelling and design method of partially CFST bridge piers considering local buckling effect
https://orcid.org/0000-0002-3862-2257
Abstract Considering the prohibitive computation time and convergence problems of shell-solid models in seismic analysis of partially concrete-filled steel tubular (CFST) bridge piers, a simple fiber-based nonlinear modelling method is proposed and calibrated in this study intended for large-scale seismic analyses. The local buckling effect of the outer steel tube is considered in the proposed method. By comparing the results of the numerical modelling with those from the experiments, the proposed fiber models are demonstrated to capture the hysteretic behavior of CFST piers with a comparable effectiveness but an enhanced efficiency and analysis time and effort over the shell-solid models. Based on the proposed fiber models, extensive cyclic pushover and time-history analyses are conducted to investigate the effect of critical design parameters on seismic performance of partially CFST piers. The analysis results indicate that the parameters of steel tube and infilled concrete should be properly designed in a combined way to mitigate the local buckling of the steel tube and thus improve the overall seismic performance of partially CFST piers. A novel design method using layered concrete filling is proposed for partially CFST piers, which can achieve an improved structural seismic performance. Furthermore, this method is validated to be especially efficient for seismic retrofit of existing hollow steel piers, which can significantly enhance the pier deformation capacity without imposing much extra force demands on pier foundations.
Highlights A fiber-based modelling method of thin-walled partially CFST bridge piers considering local buckling effect is proposed. The effectiveness of proposed fiber models is validated by using literature experimental results. Sensitivities of design parameters are revealed associated with seismic performance of partially CFST bridge piers. An improved design strategy is proposed for partially CFST bridge piers.
Novel fiber-based seismic response modelling and design method of partially CFST bridge piers considering local buckling effect
https://orcid.org/0000-0002-3862-2257
Abstract Considering the prohibitive computation time and convergence problems of shell-solid models in seismic analysis of partially concrete-filled steel tubular (CFST) bridge piers, a simple fiber-based nonlinear modelling method is proposed and calibrated in this study intended for large-scale seismic analyses. The local buckling effect of the outer steel tube is considered in the proposed method. By comparing the results of the numerical modelling with those from the experiments, the proposed fiber models are demonstrated to capture the hysteretic behavior of CFST piers with a comparable effectiveness but an enhanced efficiency and analysis time and effort over the shell-solid models. Based on the proposed fiber models, extensive cyclic pushover and time-history analyses are conducted to investigate the effect of critical design parameters on seismic performance of partially CFST piers. The analysis results indicate that the parameters of steel tube and infilled concrete should be properly designed in a combined way to mitigate the local buckling of the steel tube and thus improve the overall seismic performance of partially CFST piers. A novel design method using layered concrete filling is proposed for partially CFST piers, which can achieve an improved structural seismic performance. Furthermore, this method is validated to be especially efficient for seismic retrofit of existing hollow steel piers, which can significantly enhance the pier deformation capacity without imposing much extra force demands on pier foundations.
Highlights A fiber-based modelling method of thin-walled partially CFST bridge piers considering local buckling effect is proposed. The effectiveness of proposed fiber models is validated by using literature experimental results. Sensitivities of design parameters are revealed associated with seismic performance of partially CFST bridge piers. An improved design strategy is proposed for partially CFST bridge piers.
Novel fiber-based seismic response modelling and design method of partially CFST bridge piers considering local buckling effect
Xiang, Nailiang (author) / Feng, Yang (author) / Chen, Xu (author)
2023-03-17
Article (Journal)
Electronic Resource
English
Seismic Response Analysis of CFST Arch Bridge Considering Input Earthquake Characteristics
| British Library Conference Proceedings | 2011