|Table of Contents|

Analysis of Dynamic Response of Progressive Collapse for RC Frame Substructure(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2020年03期
Page:
1-9
Research Field:
Publishing date:

Info

Title:
Analysis of Dynamic Response of Progressive Collapse for RC Frame Substructure
Author(s):
YI Wei-jian;  HUANG Yi-mou
(College of Civil Engineering, Hunan University, Changsha 410082, Hunan, China)
Keywords:
progressive collapse;  rapid removal of middle column;  failure time;  load on beam;  dynamic increase factor
PACS:
TU973.2
DOI:
10.19815/j.jace.2019.05028
Abstract:
Numerical simulation analyses for dynamic test and static test of reinforced concrete beam-column substructures were conducted using Explicit and Standard modules of ABAQUS finite element software, respectively, and the correctness of the model was verified. Then, based on the original dynamic test, further calculations were carried out to analyze the influence of failure time of middle column and load on beam on the dynamic response of the residual structure. In order to obtain the displacement of middle column under different static loads, the dynamic test specimen was also loaded with static load, so the dynamic increase factor could be obtained, which equaled to the ratio of dynamic displacement to static displacement, then the effect of failure time and load value on the dynamic increase factor was discussed. The results show that when the failure time gets shorter, the maximum vertical displacement and amplitude of middle column will get larger; the dynamic increase factor decreases with increase of failure time. The maximum displacement of middle column increases as the load on beam increases, when the load exceeds a certain value, the displacement will continue to divergence with time, this critical load can be called dynamic ultimate bearing capacity of the residual structure, according to analysis, the ultimate bearing capacity of the residual structure increases with the increase of failure time of middle column; the load on beam has little influence on dynamic increase factor.

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Last Update: 2020-06-08