多向侧压下混凝土受拉变幅疲劳试验及损伤研究  

A STUDY ON VARIABLE-AMPLITUDE FATIGUE TEST AND DAMAGE OF CONCRETE IN TENSION AND UNDER MULTI-LATERAL PRESSURES

作　　者：杨健辉[1] 赵东拂[2] 宋玉普[3] 邹小理 

机构地区：[1]武汉工业学院,武汉430023 [2]北京建筑工程学院,北京100044 [3]大连理工大学,大连116023

出　　处：《土木工程学报》2005年第9期37-44,52,共9页China Civil Engineering Journal

基　　金：国家自然科学基金(50078010)

摘　　要：本文进行了混凝土分别在单、双向侧压作用下受拉变幅疲劳试验,得到了疲劳寿命和残余应变。根据循环应力-应变关系曲线定义了疲劳变形模量,利用疲劳变形模量比与循环次数关系,建立了损伤模型,并依据这一模型对损伤进行了估计和对剩余疲劳寿命进行了预测,结果是比较满意。Variable-amplitude fatigue tests for concrete in tension under single and bi-lateral pressures are conducted. Consequently, the fatigue life and residual strain are obtained. Fatigue deformation modulus is defined on the basis of cyclic stresstrain curve. A damage model is established through the relationship between the ratios of fatigue deformation modulus and the number of cycles. According to this model, fatigue damage degree and residual fatigue life are evaluated. The calculation resuits are satisfactory.

关 键 词：混凝土 疲劳 损伤 疲劳变形模量 侧压 受拉 

分 类 号：TU528.1[建筑科学—建筑技术科学] O346.5[理学—固体力学]