(1 中建科技集团有限公司， 深圳 518052； 2 中建科技（深汕特别合作区）有限公司， 深圳 518200)

［摘要］为研究大跨度预应力混凝土带肋叠合板在不同支撑条件下的力学性能，以及长期荷载对板变形的影响，分别进行单块叠合板在两端简支和两端梁支座条件下的静力加载试验，以及由三块预制带肋底板密拼、叠合层整体浇筑的整体大板长期加载试验。试验结果表明：两端梁支座的预应力叠合板的初始刚度和板底开裂荷载均大于两端简支预应力叠合板，预制带肋底板与现浇叠合层混凝土粘结良好，未出现开裂和剪切滑移；整体大板变形随时间不断增加，加载历时一个月后，变形趋于稳定，同荷载作用下整体大板的跨中挠度是两端简支单块叠合板跨中挠度的23.6%，整体大板呈现出双向受力特征。 

［关键词］大跨度；预应力；带肋叠合板；整体大板；开裂荷载；长期荷载 

中图分类号：TU375 文献标识码：A文章编号：1002-848X(2021)13-0110-04

Experimental study on mechanical performance of large-span prestressed concrete ribbed laminated slab and its engineering application 

WANG  Hongxin1,  WANG  Qinghua1,  HUANG  Chaojun2,  LI  Xiaoli1,  SHI  Lei1 

(1 China Construction Science & Technology Group Co., Ltd., Shenzhen 518052， China； 2 China Construction Science & Technology(Shenshan Special Cooperation Zone) Co., Ltd., Shenzhen 518200， China) 

Abstract: To study of mechanical performance of large-span prestressed concrete ribbed laminated slab under different supporting conditions and to study the influence of long-term load on the slab deformation, static loading tests were conducted on a single laminated slab respectively under conditions of simply supported at both ends and supported at both beam supports, and a long-term loading test was carried out of an integral slab composed of three precast ribbed bottom plates and a laminated layer. The test results show that the initial stiffness and cracking load at the bottom of the prestressed laminated slab with two ends of beam supports are greater than those of the prestressed laminated slab with simply supported at two ends. The prestressed laminated slab and cast-in-place laminated concrete bond well, and no cracking and shearing slip occur. The deformation of the whole slab increases with time, and tends to be stable after one month of loading. The mid-span deflection of the integral slab under the same load is 23.6% of the mid-span deflection of the single laminated slab simply supported at both ends, and the integral slab presents the characteristics of bidirectional force. 

Keywords:large span； prestress； ribbed laminated slab； integral slab； cracking load； long-term load

*国家重点研发计划（2017YFC0703609）。

 作者简介：王洪欣，博士，高级工程师，一级注册结构工程师，Email：wanghongxin15@163.com。