部分再生混凝土T形截面叠合梁抗弯性能试验研究

Experimental Research on the Flexural Behavior of Partial Recycled Concrete T-shaped Cross-section Superposed Beams

通过4根部分再生混凝土T形截面叠合梁和1根普通混凝土T形截面叠合梁受弯试验结果的对比分析,研究了各试验梁荷载作用下跨中正截面的受荷性能及极限破坏形态。试验结果表明,部分再生混凝土T形截面叠合梁的受力性能及破坏机理与普通混凝土类似;混凝土梁正截面的平截面假定依然成立;随再生骨料取代率的增加,试验梁的开裂荷载及极限承载力均略有降低。

This paper mainly discussed the experimental comparison of the flexural behavior of four partial recycled concrete T - shaped cross -section superposed beams and one natural aggregate concrete T- shaped cross -section superposed beam. The results showed that the features of the flexural mechanism of these partial recycled aggregate concrete beams are basically similar to that of the natural aggregate concrete test beams ; the plane section assumption of normal section of the recycled concrete beams is applicable ; with the increasing of recycled aggregate replacement ratio, the cracking load and the ultimate bearing capacity of the beams is slightly lower.