- 摘 要
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(1 浙江理工大學(xué)土木工程系， 杭州 310018； 2 華東建筑設(shè)計研究院有限公司上海建筑科創(chuàng)中心，上海 200002； 3 浙江華臨建設(shè)集團有限公司， 杭州 311100； 4 浙江省裝配式混凝土工業(yè)化建筑工程技術(shù)研究中心， 杭州 310018)
摘要: 為了方便現(xiàn)場施工，提出了一種箍筋環(huán)扣連接預(yù)制混凝土新型疊合梁。 設(shè)計制作了不同剪跨比的 4 個預(yù)制混凝土疊合梁試件(包括“凹”形和“凸”形疊合梁各 2 個)和 2 個現(xiàn)澆對比梁試件，進行單調(diào)集中加載試驗。 通過對試件的破壞形式、荷載￣撓度曲線、鋼筋應(yīng)變等進行分析，系統(tǒng)地研究了箍筋制作工藝以及箍筋連接長度等因素對疊合梁受剪性能的影響。 試驗結(jié)果表明:各試件均發(fā)生剪切破壞，環(huán)扣連接箍筋能有效傳遞梁內(nèi)剪力；“凸”形疊合梁的縱筋應(yīng)變分布與現(xiàn)澆梁基本一致，“凹”形疊合梁與現(xiàn)澆梁的縱筋應(yīng)變差異較大；新型疊合梁的破壞荷載和初始剛度分別比現(xiàn)澆梁平均提高約 7%和 4%；“凹”形疊合梁在構(gòu)件受力性能、制作工藝和現(xiàn)場施工便利性等方面均優(yōu)于“凸”形疊合梁。
關(guān)鍵詞: 預(yù)制混凝土疊合梁； 箍筋環(huán)扣連接； 單調(diào)加載試驗； 受剪性能
中圖分類號:TU375. 1， TU317. 1 文獻標(biāo)志碼:A 文章編號:1002￣848X(2022)04￣0106￣06
DOI:10. 19701 / j.jzjg.20200596
Experimental study on shear performance of precast concrete composite beams connected bystirrup ring buckle
ZHANG Lingcong1， LU Dan2， CUI Yang3， ZHAO Zhangyuan1， SHI Jiajun1， YANG Bo1，4
(1 Department of Civil Engineering， Zhejiang Sci￣Tech University， Hangzhou 310018， China； 2 Shanghai ArchitectureTechnology Innovation Center of East China Architectural Design and Research Institute Co.， Ltd.， Shanghai 200002，China； 3 Zhejiang Hualin Construction Group Co.， Ltd.， Hangzhou 311100， China； 4 Zhejiang Precast ConcreteIndustrial Construction Technology Research Center， Hangzhou 310018， China)
Abstract: In order to facilitate on￣site construction， a new precast concrete composite beam connected by stirrup ringbuckle is proposed. Four precast concrete composite beam specimens (including two " concave" shape composite beams andtwo " convex" shape composite beam) and two cast￣in￣place comparison beam specimens with different shear span ratioswere designed and fabricated to carry out the monotonic concentrated loading test. Based on the analysis of the failure mode，the load￣deflection curve and the stirrup strain of the specimens， the influence of the fabrication technology of the stirrupand the length of the stirrup connection on the shear performance of the composite beam was systematically studied. The testresults show that shear failure occur in all specimens. The ring buckle connection stirrup can effectively transfer the shearforce in the beam. The longitudinal reinforcement strain distribution of " convex" composite beam is basically the same asthat of cast￣in￣place beam， and the longitudinal reinforcement strain of " concave" composite beam is quite different fromthat of cast￣in￣place beam. The failure load and initial stiffness of new composite beams are about 7% and 4% higher thanthat of cast￣in￣place beam. The " concave" shape composite beam is superior to the " convex" shape composite beam interms of mechanical properties， manufacturing technology and field construction convenience.
Keywords:precast concrete composite beam； stirrup ring buckle connection； monotonic loading test； shear performance
∗浙江省重點研發(fā)計劃項目(2018C03033￣2)，廣西自然科學(xué)基金項目(2018GXNSFAA050145)，國家級大學(xué)生創(chuàng)新創(chuàng)業(yè)訓(xùn)練計劃項目(201810338030)。
第一作者:張玲聰，碩士研究生，主要從事裝配式混凝土結(jié)構(gòu)方向的研究，Email: 1395788513@ qq.com。
[引用本文] 張玲聰，盧旦，崔暘，等. 箍筋環(huán)扣連接預(yù)制混凝土疊合梁受剪性能試驗研究[ J]. 建筑結(jié)構(gòu)，2022，52(4):106￣111. ZHANG Lingcong， LU Dan， CUI Yang， et al. Experimental study on shear performance of precast concretecomposite beams connected by stirrup ring buckle[J]. Building Structure，2022，52(4):106￣111.
