布置筒芯的现浇混凝土空心板受弯性能试验研究

Experimental study on bending behavior of cast-in-situ concrete hollow slab laying tube filler

通过一组纵、横向布置筒芯的现浇混凝土空心板荷载试验,研究了该空心板抗弯承载力、裂缝分布与发展、变形及破坏形态等。试验结果表明:纵、横向布置筒芯的现浇混凝土空心板的抗弯刚度、抗弯承载力和破坏形态非常相似,筒芯的布置方式对现浇混凝土空心板的受弯性能没有明显影响;利用现行规范计算其开裂弯矩和极限弯矩是偏于安全的。

The cast- in- situ concrete hollow slabs laying longitudinal and transverse tube filler were tested. The capacity of bending , crack, deflection and failure model were studied. Test results show that the bending rigidity , the capacity of bending and the failure model of the cast - in - situ concrete hollow slabs laying longitudinal and transverse tube filler are very similar. The mode of laying tube filler has almost no influence on the bending behavior . It is safe to use current code to calculate the crack bending moment and ultimate bending moment.