田志昌，胥通奇，张黎明

( 内蒙古科技大学建筑与土木工程学院，内蒙古包头014010)

关键词: 合力作用线; 静力推覆; 质量中心; 刚度中心; 强度中心

中图分类号: TU375． 4 文献标识码: A

摘要: 通过弹塑性推覆方法分析结构进入塑性后强度中心的偏离现象，研究质量分布对强度中心分离程度的影响．在同一规则结构上，按两种不同的质量分布，分别对结构进行推覆分析，比较两种情况强度中心的偏离，初步显示强度中心偏离程度基本一致．

The analysis of the detachment of the center about concrete frames’strength

TIAN Zhi-chang，XU Tong-qi，ZHANG Li-ming

( Architecture and Civil Engineering School，Inner Mongolia University of Science and Technology，Baotou 014010，China)

Key words: the line of the composition force; the pushover analysis; the center of mass; the center of stiffness; the center of strength

Abstract: By elasto-plastic pushover method，the detachment about the center of strength is analyzed． The influences of the structural different mass distribution on the detachment are researched． The pushover analysis of the two different mass distributions based on the same regular structure was carried out，and the detachments about the center of strength from the two different mass distributions are compared． It shows that the detachments about the center of strength in the two cases are nearly the same．