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（1 浙江工業(yè)大學(xué)工程設(shè)計(jì)集團(tuán)有限公司， 杭州 310014；2 浙江浙工大檢測(cè)技術(shù)有限公司，杭州 310014； 3 浙江工業(yè)大學(xué)建筑工程學(xué)院， 杭州 310014）

［摘要］針對(duì)四邊不出筋、板側(cè)采用密拼連接的鋼筋桁架疊合雙向板進(jìn)行了足尺加載試驗(yàn)，研究了疊合雙向板承載能力、裂縫開(kāi)展、剛度變化、拼縫處受力性能等。試驗(yàn)結(jié)果表明：試驗(yàn)板在豎向荷載作用下的各項(xiàng)受力特性均表現(xiàn)為明顯的雙向板特征，滿(mǎn)足正常使用極限狀態(tài)與承載能力極限狀態(tài)的要求，拼縫處通過(guò)增強(qiáng)附加鋼筋、加密鋼筋桁架等措施可有效限制連接處裂縫開(kāi)展，保證接縫承載能力。通過(guò)對(duì)撓度、鋼筋應(yīng)變的分析，認(rèn)為試驗(yàn)板垂直拼縫方向板帶剛度略小于平行拼縫方向板帶剛度。

［關(guān)鍵詞］裝配式混凝土結(jié)構(gòu)； 密拼連接； 鋼筋桁架； 疊合雙向板

中圖分類(lèi)號(hào)：TU375， TV334文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：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

*浙江省重點(diǎn)研發(fā)計(jì)劃項(xiàng)目-裝配式混凝土工業(yè)化建筑安全評(píng)價(jià)關(guān)鍵技術(shù)及應(yīng)用（2018C03033-2）。

作者簡(jiǎn)介：章雪峰，碩士，高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email：zhangxue_feng@126.com。