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结合现浇空心楼盖与叠合楼盖的优点,提出在一种新型预应力叠合楼板中布置筒芯内模以形成叠合空心楼扳。进行了3组共10块模型板带的板端抗剪试验,根据实测试件的荷载位移曲线、受剪承载力及板中箍筋应变变化情况,研究了筒芯内模布置方式、预制底板形式、抗剪箍筋、肋梁及顺筒肋对叠合空心板受剪性能和自然粗糙叠合面粘结强度的影响。研究结果表明:顺筒布置的叠合空心板抗剪承载力高于横筒布置的对比试件;预制带肋底板的预制纵肋能有效提高叠合空心试件的抗剪性能和叠合面水平抗剪强度;无论筒芯布置方式和预制底板形式如何变化,叠合层混凝土与预制底板的叠合面粘结强度均满足水平抗剪要求;依据试验结果,提出了考虑不同混凝土强度等级、叠合面高度、肋梁和顺筒肋影响的叠合空心板受剪承载力计算方法。
In combination with the advantages of cast-in-situ hollow floor and laminated floor, it is proposed to lay out the inner core of the core in a new prestressed laminated floor to form a laminated hollow floor. Based on the measured load-displacement curve, the shear capacity and the strain of the stirrups in the plate, the internal mode arrangement of the core, the prefabricated floor Effects of shear strength, shear strength, shear strength, and shear strength of natural superplastic composite slab. The results show that the shear strength of the laminated hollow slab arranged in a straight line is higher than that of the cross-tube arranged in a horizontal cylinder. The prefabricated longitudinal rib of the prefabricated ribbed slab can effectively improve the shear resistance and the overlapped surface The shear strength of the horizontal plane of the prefabricated concrete slab is less than the horizontal shear strength of the prefabricated slab, no matter how the arrangement of the core and the form of the prefabricated slab change. Shear bearing capacity of composite hollow slab subjected to overlapped slab height, rib beam and cistern rib.