强震下单层柱面网壳的倒塌机制

Collapse Mechanism of Single-Layer Cylindrical Latticed Shell under Severe Earthquake.

作者信息

Zhou Haitao, Zhang Yigang, Fu Feng, Wu Jinzhi

机构信息

School of Civil and Transportation, Henan University of Urban Construction, Pingdingshan 467001, China.

Spatial Structure Research Center, Beijing University of Technology, Beijing 100124, China.

出版信息

Materials (Basel). 2020 Jun 1;13(11):2519. doi: 10.3390/ma13112519.

DOI:10.3390/ma13112519

PMID:32492826

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7321448/

Abstract

In this paper, the results of finite element analyses of a single-layer cylindrical latticed shell under severe earthquake are presented. A 3D Finite Element model using fiber beam elements is used to investigate the collapse mechanism of this type of shell. The failure criteria of structural members are simulated based on the theory of damage accumulation. Severe earthquakes with peak ground acceleration (PGA) values of 0.5 g are applied to the shell. The stress and deformation of the shell are studied in detail. A three-stage collapse mechanism "double-diagonal -members-failure-belt" of this type of structure is discovered. Based on the analysis results, measures to mitigate the collapse of this type of structure are recommended.

摘要

本文给出了单层柱面网壳在强震作用下的有限元分析结果。采用纤维梁单元建立三维有限元模型，研究该类网壳的倒塌机制。基于损伤累积理论模拟结构构件的破坏准则。对网壳施加峰值地面加速度（PGA）为0.5g的强震，详细研究了网壳的应力和变形情况。发现了该类结构的“双斜杆破坏带”三阶段倒塌机制。根据分析结果，提出了减轻该类结构倒塌的措施。