再生混凝土梁抗弯承载力的试验  

Experiment on flexural bearing capacity of concrete beams with aggregate recycled

作　　者：刘佳亮[1] 孙伟民[1] 郭樟根[1] 戴薇原[1] 曹其艇[1] 周彬彬[1] 

机构地区：[1]南京工业大学土木工程学院,江苏南京210009

出　　处：《南京工业大学学报（自然科学版）》2008年第5期38-42,共5页Journal of Nanjing Tech University(Natural Science Edition)

基　　金：江苏省自然科学基金资助项目(BK2005117)

摘　　要：对10根不同废弃骨料掺入量的再生混凝土梁进行了抗弯承载力试验,研究了再生混凝土梁正截面受力全过程和破坏形态.试验结果表明:再生混凝土梁与普通混凝土梁一样,正截面受弯破坏都需要经历弹性、开裂、屈服和破坏4个阶段;再生混凝土梁同样符合平截面假定.最后,根据GB50010—2002《混凝土结构设计规范》提出的普通混凝土梁的计算公式,验算了再生混凝土梁的极限承载力与普通混凝土梁极限承载力差别不大,可以用现行的公式计算.The flexural bearing capacite of simple-support beam made from concrete with different replacement ratios of recycled aggregate is discussed. Based on the experimental results, the conclusions are as follows ： in bending, the discussed concrete beam under goes elastic, cracking, yield and failure periods as ordinary concrete beam. The average strain measured on cross-section comforms the plane section assumption. Finally, with the formula suggested by present Code for Concrete Structure Design of （GB50010-2002） to check the proposed concrete beams, the conclusion is the ultimate bearing capacity of concrete beam with recycled aggregate has not any different from that of ordinary concrete one. So the present formula in Code can be used to calculate the concrete beam from recycled aggregate.

关 键 词：再生混凝土梁 再生骨料取代率 抗弯承载力 

分 类 号：TU375.1[建筑科学—结构工程]