|Table of Contents|

Analysis of Vertical Collapse Resistance of Damaged RC Frame Structure Under Seismic Action(PDF)

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

Issue:
2020年06期
Page:
64-72
Research Field:
Publishing date:

Info

Title:
Analysis of Vertical Collapse Resistance of Damaged RC Frame Structure Under Seismic Action
Author(s):
HE Qing-feng1; 2;  NIE Yu-lian1;  DENG Ying-ting1
1. College of Civil Engineering, Hunan University, Changsha 410082, Hunan, China; 2. Hunan Provincial Key Laboratory on Damage Diagnosis for Engineering Structures, Hunan University, Changsha 410082, Hunan, China
Keywords:
vertical collapse resistance;  time history analysis method;  damaged frame structure;  vertical seismic action;  failure process;  OpenSees
PACS:
TU311.41
DOI:
-
Abstract:
In order to study the vertical continuous collapse performance of reinforced concrete frame structures with damaged supporting members under seismic action, three far-field seismic waves, four near-field seismic waves and one artificial seismic wave were selected from database of Pacific Earthquake Engineering Research Center(PEER)as seismic inputs. The failure process of the damaged column was simulated by using the equivalent axial force variation. Based on the OpenSees platform, the vertical collapse resistance of plane frame structures whose columns gradually failed under seismic action was analyzed by time history analysis method. The results show that under the influence of 8 degree rare earthquake(peak acceleration is 0.4g, g is gravitational acceleration), the damaged column fails rapidly; under the same failure time, the vertical peak acceleration and the vertical component of seismic total energy can significantly increase the vertical response of structures, thus increasing the risk of vertical collapse of the structure; compared with the case without considering seismic action, the peak vertical displacement of the middle column and the peak strain of tensioned steel bar at the end of adjacent beam of middle column increase significantly; with the increase of failure time of the middle column, the influence of dynamic effect is gradually weakened, and the influence of seismic action on the residual structure is gradually reduced.

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