反复荷载作用下混凝土异形柱结构累积损伤分析及试验研究

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发布时间：2022-07-07

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摘要：反复荷载作用下混凝土结构的累积损伤将加重其力学性能的劣化,实用的结构累积损伤评价模型,可以定量确定结
构的剩余刚度和强度，为结构安全评估和修复加固提供理论依据。本文以结构在理租无损伤外力所作的功为初始
标址，依据耗散原理,提出反复荷载作用下结构系伤评价模型，应伤模合试验数据分别L形装自
柱、异形柱框架节点和异形柱框架结构进行了第积损伤分析,所得到的损伤评价指标，能较好反复作用下锅
筋混凝土结构的累计损伤状态。
关键词:异形柱框架结构；损伤模型；反复荷载试验；累积损伤
中图分类号：TU375 TU317.1
文献标识码：A
Analysis and experiment of cumulated damage of RC structures
with special columns under cyclic loading
DIAO Bo, L Shuchum, YE Yinghua
( Department of Civil Engineering, Beihang University, Beijing 100083）
Abstract: The mechanics performance of RC structure will deteriorate due to cumulated damage under cyclical loading. An
applied estimating model of structural cumulated damage not only can ascertain the damage assessment and residual capability
quantitatively but also provide theoretical evidence of safety evaluation and rehabilitation. A damage estimating model of RC
structure based on the theory of energy dissipation was derived；it was assumed that the initial scalar was the work done by
cycle load under ideal non-damage state. With the derved damage estimating model. the cumulated damages were analyze
for L-shaped columns , joints of special columns-beam frame and RC special columns frame structure according to experimental
data. The analytical results and damage estimating indexes indicate cumulated damage state of RC structures with special
columns under cyclic loading
Keywords：RC frame structure with special columns；damage model；cyclic loading test；cumulated damage
0 引言
在强烈地震作用下,混凝土结构会发生相当大的塑
现结构“小震不坏、中震可修、大震不倒”的抗震设防原
性变形而产生严重损伤甚至倒塌,安全、合理的抗震结
则。
构应根据结构地震设防烈度的损伤预测值来进行设计。
要建立混凝土结构基于损伤的抗震设计方法,首先
由于地震时地面运动的复杂性以及影响结构损伤因素
要建立既便于工程实际应用又能真实反映结构损伤程
的多样性,目前还没有令人满意的损伤评价模型。现行
度的模型，各国学者做了许多相关研究工作,混凝土结
抗震设计规范仍采取按承载力设计、变形验算的方法实
构累积损伤研究主要分构件和结构两个层次,前者研究