摘要
本文以桥墩混凝土最大裂缝宽度、残余位移、保护层混凝土脱落及纵筋屈曲为主要损伤破坏指标,建立了联系地震动类型、强度和桥墩各损伤破坏指标之间的关系,并以此为基础提出了钢筋混凝土桥墩的地震损伤破坏分析方法.最终以一个实际桥墩为例,通过增量动力分析手段获得了其在不同地震作用下峰值位移、残余位移、混凝土裂缝宽度、混凝土保护层脱落、纵筋屈曲等地震损伤指标,对桥墩地震损伤破坏分析方法进行了说明.结果表明:所建立的数值分析方法可较为准确的模拟桥墩的震后残余变形、混凝土开裂等损伤破坏,且近断层地震动输入下桥墩的地震损伤破坏远大于远断层地震动.
The maximum concrete crack width,residual displacement,concrete cover spallingand longitudinal bar buckling were taken as the seismic damage parameters for thebridge piers.The relationship between the ground motion type,ground motion amplitudeand the seismic damage level of the bridge piers was established.Based on this,themethod to analyze the seismic damages to reinforced concrete bridge piers was proposed.At last,taken a bridge pier as an example,the seismic damages to the piers,whichincluding the maximum displacement,the residual displacement,concrete crackingwidth,concrete cover spalling and longitudinal bar buckling,were obtained by theincrement dynamic analysis.Also,the seismic damage analysis method for the piers wasillustrated.It is found that the proposed numerical simulation method could predict theresidual drift ratio and the concrete cracking damage well,and the seismic damages tothe bridge piers under near-fault ground motions are much serious than that under far-field ground motions.
作者
孙治国
郭迅
周英武
杜敏
SUN Zhiguo;GUO Xun;ZHOU Yingwu;DU Min(School of Civil Engineering,Institute of Disaster Prevention,Beijing 101601,China;Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering,Shenzhen University,Shenzhen 518060,China)
出处
《应用基础与工程科学学报》
EI
CSCD
北大核心
2019年第1期131-143,共13页
Journal of Basic Science and Engineering
基金
地震科技星火计划项目(XH17064)
国家自然科学基金项目(51678150)
广东省滨海土木工程耐久性重点实验室开放基金项目(GDDCE16-04)
关键词
桥梁抗震
钢筋混凝土桥墩
基于性能的抗震设计
地震损伤
分析方法
seismic design of bridges
reinforced concrete bridge piers
performance based seismic design
seismic damage
analysis method
