再生砖骨料混凝土梁斜截面抗剪性能试验研究

为分析剪跨比、配筋率等条件相同的情况下，不同再生砖骨料取代率下再生砖骨料混凝土梁的极限承载力、裂缝开展情况、破坏形态、破坏规律的差别，制作了5根不同再生砖骨料取代率（0，30%，50%，70%和100%）的再生砖骨料混凝土梁，进行静力加载试验.试验结果表明，再生砖骨料混凝土梁和普通混凝土梁的裂缝开展过程和破坏形态大致相同，均属于典型的剪压破坏；但再生砖骨料混凝土梁的开裂荷载、斜裂缝出现时的荷载和极限荷载均低于普通混凝土梁.当再生砖骨料取代率超过50%时，再生砖骨料混凝土梁在试验中表现出了良好的受力性能，可以应用于工程实践.

Experimental studies on shear performance of recycled brick coarse aggregate concrete beam

In order to study the difference of the ultimate bearing capacity， the diagonal cracking development situation and the fracture morphology between 5 beams which have the same axial compressive strength， 5 recycled brick coarse aggregate concrete beams having different replacement ratios of the recycled coarse aggregate are made and the static loading tests on 5 beams are carried out. The test results show that the diagonal cracking development situation and the fracture morphology of the recycled brick coarse aggregate concrete beam are typical shear compression failure and similar to the natural aggregate concrete beams； but the cracking load， the load during diagonal crack and ultimate load are lower than those 〖JP2〗of the natural aggregate concrete beams. When the replacement ratio of the recycled coarse aggregate is more than 50%， the recycled brick coarse aggregate concrete beams show good mechanical properties in the course of experiments and can be considered to apply to engineering practices.