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Seismic collapse analysis of high-rise reinforced concrete frames under long-period ground motions

机译：长期地面运动下高层钢筋混凝土框架的地震塌陷分析

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摘要

Structural damages associated with buckling of longitudinal reinforcing steel and crushing of concrete induce strength and stiffness degradation in reinforced concrete (RC) beams and columns. This paper presents a numerical investigation on earthquake-induced damages and collapse of typical high-rise RC buildings model incorporating strength degradation (SD) effects. In a simple finite-element analysis program with the generalized stress fiber discretization, hysteretic constitutive models primarily dominate the inelastic behavior. Buckling of reinforcing steel and crushing of confined concrete are taken into accounted to the stress-strain relationship of fiber elements. The SD effect in components with small hoop ratio tends to amplify the seismic responses high-rise RC moment-resisting frames when the intensity of ground motions exceeds the design level. Buckling of steel rebar and crushing of concrete should be fully considered together with the P-Delta effect for collapse simulations.
机译：钢筋混凝土（RC）梁和柱混凝土诱导强度和刚度降解的纵向增强钢和粉碎相关的结构损伤。本文介绍了地震诱导的损伤和典型高层RC建筑模型崩溃的数值调查，包括强度降解（SD）效应。在具有广义应力纤维离散化的简单有限元分析程序中，滞后本构模型主要占主导地位的无弹性行为。屈服于加强钢和挤压混凝土的屈曲，占纤维元件的应力 - 应变关系。具有小环箍比的组件中的SD效应趋于放大当地面运动强度超过设计水平时的抗震响应高层RC力矩抵抗框架。应充分考虑钢钢筋和混凝土的碎屑，并与崩溃模拟的p-delta效果完全考虑。

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