基于OpenSees的圆钢管加固RC圆截面桥墩抗震性能数值分析  

Numerical analysis of seismic performance for circular RC bridge piers reinforced with circular steel tubes based on opensees

作　　者：黄海新 张望欣 程寿山 Huang Hai-xin;Zhang Wang-xin;Cheng Shou-shan(School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China;Research Institute of Highway,Ministry of Transport,Beijing 100080,China)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]交通运输部公路科学研究所,北京100080

出　　处：《工程抗震与加固改造》2020年第2期113-120,共8页Earthquake Resistant Engineering and Retrofitting

基　　金：国家重点研发计划项目(2017YFE0103000);天津市交通运输科技发展计划(2018-35);河北省交通运输厅科技项目(TH-201916)。

摘　　要：为深入研究圆钢管全长加固、套筒加固和墩底局部加固对RC圆截面桥墩的抗震性能影响,利用OpenSees有限元软件,对剪跨比分别为4、8、10的三根RC圆截面桥墩采取上述三种加固方式进行滞回分析以及动力时程分析。结果表明:圆钢管全长加固方式能显著提高RC圆截面桥墩的峰值承载能力、耗能能力与抗弯能力,显著减小墩顶最大位移角;套筒加固方式能提高RC圆截面桥墩的峰值承载能力,对其耗能能力及抗弯能力无明显提升,在剪跨比为8、10时能较有效的减小墩顶最大位移角;墩底局部加固方式能小幅提升RC圆截面桥墩的峰值承载能力、耗能能力与抗弯能力,在剪跨比为4时能较有效的减小墩顶最大位移角。In order to study the effect of full-length steel tube reinforcement,tubed columns reinforcement and local reinforcement at the bottom of piers on the seismic performance of circular RC bridge piers,three RC piers with shear span ratios of 4,8 and 10 are analyzed by using OpenSees finite element software.The results show that the full-length steel tube reinforcement can significantly improve the peak bearing capacity,energy dissipation capacity and flexural capacity of RC piers,and greatly reduce the maximum drift ratio at the top of piers;tubed reinforcement can improve the peak bearing capacity of RC piers,but its energy dissipation capacity and flexural capacity are not improved,and the maximum drift ratio at the bottom of piers can be effectively reduced when the shear-span ratio is 8 or 10;the local reinforcement at the bottom of piers can improve the peak bearing capacity,energy dissipation capacity and flexural capacity of long piers slightly,and can effectively reduce the maximum drift ratio of pier top when the shear span ratio is 4.

关 键 词：钢板加固 滞回性能 动力时程分析 OPENSEES 

分 类 号：TU352[建筑科学—结构工程]