考虑应变率效应的钢筋混凝土结构非线性地震灾变过程模拟

张皓1,2,李宏男1,3,曹光伟1,尚兵4

振动与冲击 ›› 2018, Vol. 37 ›› Issue (17) : 169-177.

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PDF(2892 KB)
振动与冲击 ›› 2018, Vol. 37 ›› Issue (17) : 169-177.
论文

考虑应变率效应的钢筋混凝土结构非线性地震灾变过程模拟

  • 张皓1,2,李宏男1,3,曹光伟1,尚兵4
作者信息 +

Simulation for nonlinear seismic disaster process of RC structures considering strain rate effect

  • ZHANG Hao1,2,LI Hongnan1,3,CAO Guangwei1,SHANG Bing4
Author information +
文章历史 +

摘要

为研究应变率对钢筋混凝土结构非线性地震灾变过程的影响,采用钢筋、混凝土单轴动态本构关系及加卸载准则,基于纤维梁理论开发了ABAQUS显式动力分析材料子程序。通过对3层偏心钢筋混凝土框-剪结构振动台试验的数值模拟,验证了该程序用于钢筋混凝土结构非线性地震反应分析的准确性和有效性。通过在材料子程序中定义钢筋、混凝土材料失效破坏判别准则,实现了地震作用下考虑应变率效应的钢筋混凝土结构连续倒塌破坏全过程模拟。分别对振动台试验模型结构和钢筋混凝土框架结构的倒塌破坏模式进行了预测,初步探讨了应变率对钢筋混凝土结构地震反应与连续倒塌破坏过程的影响。结果表明:该程序能够准确模拟钢筋混凝土结构的非线性地震灾变过程,可用于考虑材料应变率效应的钢筋混凝土结构抗震设计与分析中。

Abstract

In order to investigate the effects of strain rate on nonlinear seismic disaster process of RC structures under earthquake,using the uniaxial dynamic constitutive relations of reinforcement and concrete and their loading and unloading regulations,a material subroutine of ABAQUS explicit dynamic analysis based on the fiber beam theory was developed. Numerical simulation with this subroutine for a three-story RC frame-shear wall structure’s shaking table test was conducted to verify the correctness and effectiveness of this subroutine applied in RC structures’nonlinear seismic response analysis. The simulation for progressive collapse damage process of a RC structure considering strain rate effect was realized by defining failure damage criteria of reinforcement and concrete in the material subroutine. The progressive collapse damage modes of the shaking table test’s model structure and the RC frame structure were predicted,respectively. The effects of strain rate on the seismic response and progressive collapse damage process of the RC structure were preliminarily discussed. The results showed that the developed subroutine can correctly simulate the nonlinear seismic disaster process of RC structures,and it can be applied in RC structures’aseismic design and analysis considering strain rate effect.



关键词

钢筋混凝土结构 / 应变率 / 纤维梁单元 / 非线性 / 连续倒塌

Key words

reinforced concrete (RC) structure / strain rate / fiber beam element / nonlinear / progressive collapse

引用本文

导出引用
张皓1,2,李宏男1,3,曹光伟1,尚兵4. 考虑应变率效应的钢筋混凝土结构非线性地震灾变过程模拟[J]. 振动与冲击, 2018, 37(17): 169-177
ZHANG Hao1,2,LI Hongnan1,3,CAO Guangwei1,SHANG Bing4. Simulation for nonlinear seismic disaster process of RC structures considering strain rate effect[J]. Journal of Vibration and Shock, 2018, 37(17): 169-177

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