结构倒塌模拟的简单开源算例

一、引言

2008汶川地震底层临近倒塌建筑 (陆新征摄，都江堰)

2008汶川地震底部倒塌建筑 (叶列平摄，都江堰)

2010玉树地震底层倒塌建筑 (陆新征摄)

课题组在OpenSees程序中添加的功能模块

1. 新型墙板模型和壳单元 (参阅：A shear wall element for nonlinear seismic analysis of super-tall buildings using OpenSees. Finite Elements in Analysis & Design, 2015；A high-performance quadrilateral flat shell element for seismic collapse simulation of tall buildings and its implementation in OpenSees, Journal of Earthquake Engineering, 2018等)

2. 显式动力算法和高性能求解器 (参阅: Development and application of a high performance triangular shell element and an explicit algorithm in OpenSees for strongly nonlinear analysis, Computer Modeling in Engineering & Sciences, 2019；A computational framework for regional seismic simulation of buildings with multiple fidelity models, Advances in Engineering Software, 2016；基于显式算法的RC框架结构抗地震倒塌能力分析, 工程力学, 2020等)

3. 频变阻尼模型 (参阅: A universal rate-dependent damping model for arbitrary damping-frequency distribution, Engineering Structures, 2022等)

二、模型和计算结果

 显式计算得到的倒塌图