A DETAILED NUMERICAL ANALYSIS FOR PROGRESSIVE COLLAPSE OF PRECASTED CONCRETE FRAME SUBSTRUCTURES WITH WET CONNECTIONS

被引：0

作者：

Chen G.-S. ^{[1
]}

Cheng X.-W. ^{[1
]}

Li Y. ^{[1
]}

机构：

[1] Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing

来源：

Gongcheng Lixue/Engineering Mechanics | 2024年 / 41卷

关键词：

detailed finite element model; numerical analysis; prefabricated beam-column substructure; progressive collapse; wet connection;

D O I：

10.6052/j.issn.1000-4750.2023.05.S005

中图分类号：

学科分类号：

摘要：

In order to study the progressive collapse performance of the wet-connected prefabricated concrete beam-column substructures, the finite element software LS-DYNA was adopted to establish detailed models for three specimens in previous work. The solid elements and CSCM material model were used for concrete, and the beam elements and the piecewise linear plasticity model were used for rebars. The bond-slip of rebars and concrete was considered within the area of 1.5 times beam height of the beam-column joint, while the element failure function provided by LS-DYNA was used to simulate the fracture of rebars and concrete cracking. The size reduction of rebars was considered to simulate the mechanical sleeve connection, and the anchor plates in beam-column joint were modeled by the equivalent area method with the contact defined by the keyword *CBIS to prevent penetration. The errors of the obtained structural strengths between numerical and experimental results are less than 15%, and the structural mechanism and failure mode of each specimen are consistent with those of the test. © 2024 Tsinghua University. All rights reserved.

引用

页码：157 / 164

页数：7

共 19 条

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