钢筋混凝土梁疲劳弯曲损伤指标的计算方法  

CALCULATION METHOD FOR DAMAGE INDEX OF RC BEAM UNDER FATIGUE LOADING

作　　者：贾金青[1] 张丽华[1] 孟刚[1] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,大连116023

出　　处：《工业建筑》2012年第8期54-58,共5页Industrial Construction

基　　金：国家863计划资助项目(2007AA11Z133)

摘　　要：目前,国内外主要使用试验的方式研究钢筋混凝土梁疲劳弯曲性能。基于混凝土割线模量损伤与其塑性应变的线性关系,采用混凝土的塑性应变构造了损伤变量,并以此为依据推导了能够用于钢筋混凝土梁的弯曲疲劳全过程分析的损伤指标计算公式。通过与试验结果的比较,证明了该计算方法的适用性和可靠性。At present, the existing researches on the fatigue performance of reinforced concrete beam are mainly made by experiments. Based on the linear relationship between the damage of concrete secant modulus and plastic strain, the damage variable of the beam was established by plastic strain. And then, the calculation formula of damage index was derived, which could be used in the complete process analysis. Through the comparison with experimental results, the applicability and reliability of the formula was proved.

关 键 词：钢筋混凝土梁 疲劳弯曲 损伤指标 塑性应变 

分 类 号：TU375.1[建筑科学—结构工程]