Numerical simulation of RC shear wall structure based on different damage constitutive models of concrete

被引：0
作者：
He J. [1 ,2 ]
Chen J. [1 ,2 ]
Ren X. [2 ]
Li J. [1 ,2 ]
机构：
[1] State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai
[2] College of Civil Engineering, Tongji University, Shanghai
来源：
Jianzhu Jiegou Xuebao/Journal of Building Structures | 2021年 / 42卷 / 06期
关键词：
Constitutive model; Nonlinear; Plastic damage; RC shear wall structure; Softened effect; Stochastic damage model; Structural dynamic response;
D O I：
10.14006/j.jzjgxb.2019.0025
中图分类号：
学科分类号：
摘要：
Nonlinearity and randomness exist in mechanical performance of concrete. Therefore, reasonable constitutive model of concrete is the basis for dynamic analysis and reliability evaluation of reinforced concrete structures subjected to seismic actions. For this purpose, three different constitutive models for concrete, including the concrete damaged plasticity (CDP) model, the mesoscopic random fracture model (MRFM) and the softened mesoscopic random fracture model (MRFMs), were adopted in dynamic response analysis of a nine-story RC shear wall structure. The numerical results were compared and validated by a completed shaking table test. It is shown that all the three models can capture the maximal relative top displacement of the shear wall structure. However, due to the unreasonable assumption that the damage is completely dependent on plastic strain, the CDP model results in inter-story drift ratios with large error and misleading damage distribution. In contrast, the MRFM is superior in capturing the failure mode, cracking and damage distribution. Moreover, by taking into account the softening effect, the MRFMs can not only capture the preceding characteristics quantitatively and the flexure-shear failure mode, but also reflect the compressive failure in the bottom occurring in the experiment. © 2021, Editorial Office of Journal of Building Structures. All right reserved.
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页码：139 / 149
页数：10
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