（1 浙江工业大学工程设计集团有限公司， 杭州 310014；2 浙江浙工大检测技术有限公司，杭州 310014； 3 浙江工业大学建筑工程学院， 杭州 310014）

［摘要］针对四边不出筋、板侧采用密拼连接的钢筋桁架叠合双向板进行了足尺加载试验，研究了叠合双向板承载能力、裂缝开展、刚度变化、拼缝处受力性能等。试验结果表明：试验板在竖向荷载作用下的各项受力特性均表现为明显的双向板特征，满足正常使用极限状态与承载能力极限状态的要求，拼缝处通过增强附加钢筋、加密钢筋桁架等措施可有效限制连接处裂缝开展，保证接缝承载能力。通过对挠度、钢筋应变的分析，认为试验板垂直拼缝方向板带刚度略小于平行拼缝方向板带刚度。

［关键词］装配式混凝土结构； 密拼连接； 钢筋桁架； 叠合双向板

中图分类号：TU375， TV334文献标识码：A文章编号：1002-848X(2019)15-0083-05

Experimental study on full-scale steel bar truss superimposed two-way slabs without extending reinforcement on all sides and connected without gap

Zhang Xuefeng1，2， Zheng Shuguang1， Shan Yuchuan1， Zhou Xiaoyue1， Chen Dong3

（1 Zhejiang Design Group Co., Ltd.， Zhejiang University of Technology， Hangzhou 310014, China；2 Testing Technology Co.， Ltd of Zhejiang University of Technology， Hangzhou 310014, China；3 College of Civil Engineering， Zhejiang University of Technology， Hangzhou 310014, China）

Abstract:A full-scale loading experiment was carried out on the type of steel bar truss superimposed two-way slab that has no extended reinforcement on all sides and are connected without gap. The properties of superimposed two-way slab were studied including its bearing capacity, crack development, stiffness change and force performance at the joint. The research results indicate that under vertical load, the force characteristics of the test slab all demonstrate typical two-way slab features, which meet the requirements of the serviceability limit states and the ultimate limit states. The means of strengthening the additional reinforcement and increasing the density of steel bar truss at the joint can effectively limit the crack development and ensure the bearing capacity of the joints. Through the analysis of the deflection and the strain of the reinforcement, it is considered that the stiffness of the slab in the vertical direction to the seam is slightly smaller than the stiffness of the slab in the parallel direction to the seam.

Keywords:precast concrete structure; connection without gap; steel bar truss; superimposed two-way slab

*浙江省重点研发计划项目-装配式混凝土工业化建筑安全评价关键技术及应用（2018C03033-2）。

作者简介：章雪峰，硕士，高级工程师，一级注册结构工程师，Email：zhangxue_feng@126.com。