摘要
研究了再生骨料混凝土简支梁和普通混凝土梁在静力荷载作用下的裂缝的产生发展、应变以及挠度等变化。研究结果表明:相同荷载作用下,再生骨料混凝土梁的裂缝宽度略大于普通混凝土梁;加载后期,再生骨料混凝土试件梁的剪弯区裂缝发展速度较快,跨中裂缝和斜裂缝快速增长;再生混凝土梁在受力过程中正截面应变变化也基本符合平截面假定;试件梁未开裂时,再生骨料混凝土梁的挠度随再生骨料掺量的增大而增大。
This article investigated the simply-supported beam of the recycled aggregate concrete and common concrete, which were under the power of static load, to research the formation and development of cracks, the changes of stain and deflection. Compared the recycled aggregate concrete beam to the common ones, the research results showed that under the action of the same load, the width of cracks of the former, are slightly larger. In the post-load, the cracks in the shear moment regions of the beam were developing quickly. In the middle span of the beam, the cracks and inclined cracks were developing with a fast speed. During the beam of recycled aggregate concrete being under the load, the changes of the normal section＇s stain were complied with the assumption of plane section. When the crack did not appear in the specimen of recycled aggregate concrete, the deflections were increasing with the amount of recycled aggregate.
出处
《武汉理工大学学报》
EI
CAS
CSCD
北大核心
2008年第8期113-116,共4页
Journal of Wuhan University of Technology
基金
北京市自然科学基金(8052008)
关键词
再生骨料
混凝土简支梁
裂缝
应变
recycled aggregate
concrete simply-supported beam
crack
strain
