不同地震作用方向下混凝土核心筒基于增量动力分析的抗震性能评估

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (14) : 116-121.

论文

不同地震作用方向下混凝土核心筒基于增量动力分析的抗震性能评估

侯炜1, 史庆轩2

作者信息 +

Seismic behavior evaluation for reinforced concrete core walls based on incremental dynamic analysis under different earthquake directions

HOU Wei1, SHI Qing-xuan2

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文章历史 +

摘要

强震作用下，核心筒对混合结构发生破坏乃至倒塌有着重要影响。选择合适的地震输入，进行核心筒在双向或多向地震作用下的地震反应分析是值得深入研究的。采用动力时程分析方法，通过不同方向地震作用与单向地震作用下混凝土核心筒的地震效应对比可知，在进行结构设计时，大震作用下，斜向地震作用下的内力要明显偏大，仅考虑单向输入的水平加速度的设计结果会偏于不安全。并通过输入与Y轴45°斜向地震记录基于单条地震记录的增量动力分析方法（IDA方法）对核心筒进行抗震性能评估。结果表明，斜向地震输入对核心筒IDA曲线有一定影响，但各性能点对应的量化位移指标与Y向单条地震输入时相差不大。

Abstract

The seismic performance of core walls is decisive for hybrid structure under strong earthquake. It is worth to study intensively on seismic response analysis under double and multi-direction earthquakes action by choosing appropriate earthquake records. The dynamic time history analysis of core walls was performed. By comparison with the seismic effect under unidirectional earthquake action, the structural internal force under oblique directional seismic action is much stronger and the design results based on unidirectional earthquake records input will be unsafe. The seismic performance of core walls based on single-record IDA method was analyzed under 45 ° with the Y-axis earthquake action. The results indicate that oblique directional earthquake actions have an effect on IDA curves of core walls. However, the displacement limiting values corresponding to different performance levels are close to that under Y-axis single earthquake action.

导出引用

侯炜;史庆轩. 不同地震作用方向下混凝土核心筒基于增量动力分析的抗震性能评估[J]. 振动与冲击, 2013, 32(14): 116-121

HOU Wei;SHI Qing-xuan. Seismic behavior evaluation for reinforced concrete core walls based on incremental dynamic analysis under different earthquake directions[J]. Journal of Vibration and Shock, 2013, 32(14): 116-121