高烈度地震区桥墩加固方案的选择

英文篇名：On Schemes of Strengthening Bridge Piers in Strong Earthquake-hit Areas
中文刊名：昆明冶金高等专科学校学报
英文刊名：Journal of Kunming Metallurgy College
作者：杜鹏飞 ; 苏克啓 ; 宋文
英文作者：DU Peng-fei ; SU Ke-qi ; SONG Wen(Kunming Exploration & Design Institute ; State Forestry Bureau ; Kunming 650216 ; China)
中文关键词：地震区 ; 桥墩加固 ; 刚度 ; 反应谱 ; 自振周期
英文关键词：earthquake-hit areas ; piers strengthening ; rigidity ; response spectrum ; natural vibration period
出版日期：2013-05-15
机构：国家林业局昆明勘察设计院;
年：2013
期：03
出版单位：昆明冶金高等专科学校学报

摘要

以反应谱分析为例,推导了桥墩地震力与刚度的关系,并绘制地震力—刚度关系曲线图,证明在地震作用下,桥墩地震力会随其刚度的增大而激增。以某大桥为实例,针对桥墩缺陷位置提出了2种加固设计方案,分别计算2方案的地震响应和墩身、桩基的内力变化,指出了增加桥墩刚度对桩基的不利影响,提出高烈度地震区桥墩加固应优选不改变结构刚度的加固方案。
Taking response spectrum analysis as an example,this paper deduces the relationship between the seismic forces and rigidity on piers,and draws a seismic force-rigidity curve graph,aiming to prove that seismic force on piers increases sharply as the rigidity increases when earthquake happens.Taking a bridge with defects on its piers as a case,it proposes two strengthening design schemes,and then calculates the inner force variation of seismic response and piers & pile foundation respectively.It proves that the increasing rigidity of piers has adverse effects on the pile foundation and a scheme with no change of rigidity should be chosen in strong earthquake-hit areas.

引文

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