大跨重载预应力混凝土双T板受力性能试验研究  

EXPERIMENTAL RESEARCH ON MECHANICS OF LONG-SPAN AND HEAVY-LOAD PRESTRESSED CONCRETE DOUBLE-TEES

作　　者：芦静夫 孙占琦 邱勇 黎钟文 周臻微 黄朝俊 LU Jingfu;SUN Zhanqi;QIU Yong;LI Zhongwen;ZHOU Zhenwei;HUANG Chaojun(China Construction Science&Technology Co.,Ltd.,Shenzhen 518000,China;China State Construction Development Co.,Ltd.,Beijing 100020,China;China Construction Science&Technology(Shenzhen Shantou Special Cooperation Zone)Co.,Ltd.,Shenzhen 518000,China)

机构地区：[1]中建科技有限公司深圳分公司,广东深圳518000 [2]中国建筑发展有限公司,北京100020 [3]中建科技(深汕特别合作区)有限公司,广东深圳518000

出　　处：《工业建筑》2020年第9期62-67,共6页Industrial Construction

基　　金：国家重点研发计划项目“工业化建筑设计关键技术”(2016YFC0701500)。

摘　　要：为进一步拓宽大跨度预应力双T板的应用范围,设计了一款预应力双T板,其使用活荷载标准值为30 kN/m^2,并将其应用于某实验办公楼项目。通过足尺双T板构件的静力荷载试验,获得了构件的变形特性、裂缝发展规律、正截面和斜截面承载力,验证了双T板力学性能可满足大跨重载楼面的使用需求及所采用计算方法的可行性。试验结果表明:预应力双T板具有较好的跨中抗弯和端部抗剪承载力,构件抗裂系数和挠度均满足相关标准和设计要求;双T板肋顶构造设置的桁架钢筋进一步加强了现浇面层与预制部分的整体工作性能,试验过程中未出现现浇面层与预制构件截面开裂情况。提出了合理的构造措施,有效避免了双T板生产及施工过程中肋板顶部及端部企口裂缝的产生,具有实际工程应用价值。In order to further expand the application range of long-span prestressed double-tees,a prestressed doubletees was designed,it can withstand a live load of 30 kN/m^2,and it was applied to an experimental office building project.Through the static load test of full size double-tees,the deformation characteristics,crack development law,bearing capacity of normal section and inclined section of the double-tees were obtained,and the mechanical properties of double-tees could meet the use requirements of heavy-load floor and the feasibility of calculation method was verified.The results showed that the prestressed double-tees had a suitable bearing capacity at middle span section and shear bearing capacity of dapped end,and the crack resistance coefficient and deflection of the component could meet the requirements of relevant codes and design;the truss reinforcement set on the double-tees rib top further enhanced the cooperative effect performance of the cast-in-place surface layer and the precast part.There was no cracking of the cast-in-place layer and the precast part during the test.The reasonable construction measures were proposed,which could effectively avoid the generation of cracks in rib plate top and dapped end in the production and construction process of double-tees,and having the value of practice.

关 键 词：双T板 大跨度 重载 静力试验 承载力 

分 类 号：TU756.44[建筑科学—建筑技术科学]