|Table of Contents|

Moment Magnification Factor in Anti-seismic Design of Concrete Frame Structure(PDF)

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

Issue:
2006年02期
Page:
46-51
Research Field:
Publishing date:
2006-06-20

Info

Title:
Moment Magnification Factor in Anti-seismic Design of Concrete Frame Structure
Author(s):
YI Wei-jian;  ZHANG Ying
School of Civil Engineering, Hunan University, Changsha 410082, Hunan, China
Keywords:
frame structure;  failure mode;  failure probability;  structure optimization;  bending moment magnification factor
PACS:
TU375.4
DOI:
-
Abstract:
Based on the fact that different failure modes have different loss values in a concrete frame structure under earthquake actions, the main failure modes and representative mechanisms of concrete frame structures under earthquake actions and vertical loads were found by the branch-bound method. Through introducing a structural optimization model based on the failure probability and a failure loss expectation of the structure, the values of the bending moment magnification factor of “strong column-weak beam” in the code for anti-seismic design of buildings were calibrated with an example of concrete frame. The reasonable values of bending moment magnification factor were obtained by optimization analysis, and the reliable indexes of beam mechanism and column mechanism in the frame were respectively 1.8 and 2.6. It is shown that the concrete frame structure designed according to the anti-seismic code can meet the requirement of “strong column-weak beam”.

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Last Update: 2006-06-20