recycled concrete cantilever beam, damping capacity, damage index, crack
development
,"/> 再生混凝土悬臂梁阻尼性能与损伤关系的试验研究
 
 
土木工程学报  2016, Vol. 49 Issue (7): 100-106    
  结构工程 本期目录 | 过刊浏览 | 高级检索 |
再生混凝土悬臂梁阻尼性能与损伤关系的试验研究
梁超锋  刘铁军  肖建庄  邹笃建  杨秋伟
1. 绍兴文理学院, 浙江绍兴 312000; 
2. 哈尔滨工业大学深圳研究生院,广东深圳 518055;
3. 同济大学, 上海 200092
Experimental study on relationship between damping capacity and damage degree of recycled concrete cantilever beam
Liang Chaofeng  Liu Tiejun  Xiao Jianzhuang  Zou Dujian  Yang Qiuwei
1. Shaoxing University, Shaoxing 312000, China; 
2. Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China;
3. Tongji University, Shanghai 200092, China
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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。
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梁超锋 刘铁军 肖建庄 邹笃建 杨秋伟
关键词 再生混凝土悬臂梁 阻尼性能 损伤指数 裂缝发展    
Abstract
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.
Key wordsrecycled concrete cantilever beam')" href="#">')" href="#"> crack
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引用本文:   
梁超锋 刘铁军 肖建庄 邹笃建 杨秋伟. 再生混凝土悬臂梁阻尼性能与损伤关系的试验研究[J]. 土木工程学报, 2016, 49(7): 100-106.
Liang Chaofeng Liu Tiejun Xiao Jianzhuang Zou Dujian Yang Qiuwei. Experimental study on relationship between damping capacity and damage degree of recycled concrete cantilever beam. 土木工程学报, 2016, 49(7): 100-106.
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