文献类型：期刊文献

中文题名：再生混凝土悬臂梁阻尼性能与损伤关系的试验研究

英文题名：Experimental study on relationship between damping capacity and damage degree of recycled concrete cantilever beam

作者：梁超锋[1];刘铁军[2];肖建庄[3];邹笃建[2];杨秋伟[1]

机构：[1]绍兴文理学院;[2]哈尔滨工业大学深圳研究生院;[3]同济大学

年份：2016

卷号：49

期号：7

起止页码：100

中文期刊名：土木工程学报

外文期刊名：China Civil Engineering Journal

收录：CSTPCD、、北大核心2014、EI(收录号：20163102669016)、CSCD2015_2016、Scopus(收录号：2-s2.0-84979783869)、北大核心、CSCD

基金：国家自然科学基金(51422804;51308340;51308322;51178340);浙江省自然科学基金(Y1110184)

语种：中文

中文关键词：再生混凝土悬臂梁;阻尼性能;损伤指数;裂缝发展

外文关键词：recycled concrete cantilever beam; damping capacity; damage index; crack development

中文摘要：再生混凝土结构构件非弹性阶段阻尼性能与其损伤程度密切相关。以再生粗骨料取代率及其粒级为主要参数，采用悬臂梁低周反复加载和自由衰减振动的交叉试验，研究再生混凝土悬臂梁在不同损伤阶段的阻尼性能，建立悬臂梁阻尼比与损伤指数的定量关系，探讨悬臂梁裂缝发展对其阻尼和损伤演变的影响。研究结果表明：再生混凝土悬臂梁阻尼比随损伤指数先增大后减小，峰值阻尼比是初试弹性阶段阻尼比的2～3倍；损伤指数相同时，再生混凝土悬臂梁阻尼比随再生粗骨料取代率的增加而增大，随再生粗骨料粒径的减小而增大；再生粗骨料的基本性质、取代率及其粒级对再生混凝土结构构件的阻尼比和损伤指数影响显著；再生混凝土悬臂梁阻尼性能和损伤指数的演变与悬臂梁裂缝数量、开展高度及宽度的发展密切相关。

外文摘要：The damping capacity of recycled concrete members at inelastic stage mostly depends on the damage degree. Taking the recycled coarse aggregate replacement ratio and size distribution as controlling factors, the pseudo-static test and free vibration damping test were conducted to study the damping capacity of cantilever beams damaged at different levels. The influence of crack development on damping and damage evaluation were also discussed and the quantitative relationship between damping ratio and damage index of cantilever beam was built. The test results show that the damping ratio of recycled concrete cantilever beam first sharply increases and then decreases with the damage index. The peak damping ratio is about 2 times that at elastic stage. For the same damage index, the damping ratio increases with the coarse aggregate replacement ratio, while decreases with the aggregate size. The physical and mechanical properties of recycled aggregate, replacement ratio and size distribution all have significant impacts on the damping ratio and damage index of recycled concrete member. The evolution of damping capacity and damage index of recycled concrete member is related to the crack number, density and length.