高应变下较高强度混凝土的等应变幅循环试验

英文篇名：Experimental Research on the HSC Under Cyclic Loading with Specified Constant Large Strain Amplitude
中文刊名：重庆大学学报(自然科学版)
英文刊名：Journal of Chongqing University(Natural Science Edition)
作者：傅剑平 ; 吴从超 ; 白绍良
英文作者：FU Jian-ping~1 ; WU Cong-chao~(2) ; BAI Shao-liang~1(1.College of Civil Engineering ; Chongqing University ; Chongqing 400030 ; China ; 2.The Ninth Design & Research Institute ; Shanghai 200063 ; China)
中文关键词：混凝土 ; 高压应变低周疲劳 ; 等应变幅循环加载试验
英文关键词：concrete ; low cycle fatigue under large compressive strain ; cyclic loading tests with constant strain amplitude
出版日期：2006-11-30
机构：重庆大学土木工程学院,中船第九设计研究院,重庆大学土木工程学院重庆400030,上海200063,重庆400030
年：2006
期：11
出版单位：重庆大学学报(自然科学版)

摘要

为了建立考虑高应变低周疲劳性能的混凝土受压本构规律,本文在以往的的研究工作基础上,利用全数字化电液伺服式试验机及其位移控制加卸载功能完成了最大应变以不同幅度超过ε0(0ε为与峰值应力对应的应变)的较高强度等级混凝土棱柱体的等应变幅多次重复受压试验,获得了其独特的低周疲劳特征及加卸载应力-应变规律.结果表明,其累积损伤特点与普通强度混凝土相似,在此基础上,有必要对以往的本构模型进行修正.
In order to formulate the compressive stress-strain model of concrete considering the behavior of low cycle fatigue under large strain,several fatigue tests of HSC prisms under axial compression with specified large constant maximum strain amplitude are carried out by the displacement-controlled loading function of the numeric electro-hyraulic servo test machine and the maximum strains beyond ε_0 of which are under various levels(ε_0 is the strain corresponding to the peak stress σ_o).On the base of them, the characteristics of low cycle fatigue and the loading and unloading stressstrain relation of concrete are obtained.

引文

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