:总 结 了罕遇地 震作 用 下结构倒 塌破 坏 的研 究现状 ,重 点分析 了建筑物 倒塌破 坏 的 系统 性和 不
确 定 性 ,对 比 了不 同的倒 塌破 坏 准则和 倒塌破 坏 分析 方法 ,给 出 了建 筑物倒 塌 的临界 状 态定义 。研
究 结果表 明 :现 有 的倒塌破 坏 准 则无 法准确 定 义结 构 的倒 塌 破 坏 ;时程 分析 法 更 为精 确 ,且较 少地
引入 了地 震动 随机 性影 响 ,更适 于结构 倒塌研 究 ;建议 的倒 塌破 坏 区 间能够更好 地反 映倒 塌破 坏特
性 ;塑性 变形 集 中是 框 架倒塌 的 主要原 因 ,应重视 柱 端 塑性 铰发 育导 致 的 结构 整体 性 能 退化 ;相 关
研 究成果 可 为定量研 究建筑 结构 的倒塌 破 坏提供 理论 基础 。
关键 词 :钢 筋 混凝 土框 架结构 ;地 震 ;倒 塌破 坏 ;不确 定性 ;系统 性 ;子 结构 ;破 坏 准则 ;时程 分析
中图分类 号 :TU375.4 文 献标 志码 :A
Present Research Status and Counterm easure Analysis of Earthquake
Collapse Dam age of RC Fram e Structures
LIU Bo—quan,FU Guo
(School of Civil Engineering,Chang’an University,Xi’an 710061,Shaanxi,China)
Abstract: The present researeh status of structural collapse damage under rare earthquake was
summ arized, and the systematicness and uncertainty of structural collapse damage were
emphatically analyzed. M eanwhile,the contrastive researches on the different failure criteria and
analysis methods were made,and the precise definition of the critical state on structural collapse
dam age was given. The research results show that the existing failure criteria cannot be used to
define the collapse of reinforced concrete (RC)structure precisely.Tim e history analysis method
is more accurate and suitable for collapse research owing to the introduction of a small amount of
ground m otion random ness.The recom mended interval of collapse dam age can better reflect the
characteristics of collapse dam age.The concentration of plastic deformation is the principal factor
affecting the structural frame collapse,the overall structure performance degradation caused by
the developm ent of plastic hinge in the column ends should be noted. The relevant research
results can provide a theoretical basis for quantitative research on the collapse dam age of building
structure.
Key words: RC fram e structure; earthquake; collapse dam age; uncertainty; systematiceness;
sub-structure;failure criterion;time history analysis
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