吴方伯, 刘彪, 罗继丰. 预应力混凝土叠合空心楼板的受剪性能试验研究[J]. 工程力学, 2016, 33(3): 196-203. DOI: 10.6052/j.issn.1000-4750.2014.06.0507
引用本文: 吴方伯, 刘彪, 罗继丰. 预应力混凝土叠合空心楼板的受剪性能试验研究[J]. 工程力学, 2016, 33(3): 196-203. DOI: 10.6052/j.issn.1000-4750.2014.06.0507
WU Fang-bo, LIU Biao, LUO Ji-feng. EXPERIMENTAL STUDY ON SHEAR RESISTING PROPERTIES OF PRESTRESSED CONCRETE COMPOSITE HOLLOW CORE SLABS[J]. Engineering Mechanics, 2016, 33(3): 196-203. DOI: 10.6052/j.issn.1000-4750.2014.06.0507
Citation: WU Fang-bo, LIU Biao, LUO Ji-feng. EXPERIMENTAL STUDY ON SHEAR RESISTING PROPERTIES OF PRESTRESSED CONCRETE COMPOSITE HOLLOW CORE SLABS[J]. Engineering Mechanics, 2016, 33(3): 196-203. DOI: 10.6052/j.issn.1000-4750.2014.06.0507

预应力混凝土叠合空心楼板的受剪性能试验研究

EXPERIMENTAL STUDY ON SHEAR RESISTING PROPERTIES OF PRESTRESSED CONCRETE COMPOSITE HOLLOW CORE SLABS

  • 摘要: 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板。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。

     

    Abstract: A new type of composite hollow core slabs was put forward combining the advantages of cast-in-situ hollow core slabs and composite slabs. Three parallel tests with 10 specimens were conducted. Different layouts of tube filler, prefabricated panel form, stirrup, ribs and the tube filler spacing, were studied to investigate their effects on the shear behavior of the composite hollow core slabs. The bonding strength between the slab and the topping was also evaluated based on the load-deformation curve, the shear bearing capacity and the strain of stirrup. Results indicated that the shear bearing capacity of the slab in the longitudinal hollow core strip was higher than that of the slab in the transverse hollow core strip. The precast ribs improved the shear performance and the horizontal shear strength. Regardless of the prefabricated panel forms and the layout of the tube filler, the bonding strength between the slab and the topping was adequate. Based on the experimental results, a method to estimate the shear bearing capacity of the composite hollow core slabs, in terms of concrete strength grade, the lamination position, the ribs and the tube filler spacing, was recommended.

     

/

返回文章
返回