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（1 中國(guó)建筑標(biāo)準(zhǔn)設(shè)計(jì)研究院有限公司， 北京 100048; 2 西安建筑科技大學(xué)土木工程學(xué)院， 西安 710055）

［摘要］為研究裝配式交錯(cuò)桁架結(jié)構(gòu)上弦與柱連接節(jié)點(diǎn)的抗震性能，對(duì)4個(gè)1∶2縮尺、采用外環(huán)板端板形式的裝配式交錯(cuò)桁架上弦方鋼管混凝土柱節(jié)點(diǎn)試件進(jìn)行了低周往復(fù)循環(huán)加載試驗(yàn)，對(duì)其破壞模式、承載力、剛度、延性、耗能能力以及應(yīng)變變化規(guī)律進(jìn)行了分析。試驗(yàn)結(jié)果表明，外環(huán)板-端板形式的裝配式交錯(cuò)桁架上弦方鋼管混凝土柱節(jié)點(diǎn)可能出現(xiàn)豎板剪切破壞、柱壓彎破壞和節(jié)點(diǎn)板撕裂3種破壞模式；當(dāng)偏心距較小時(shí)，節(jié)點(diǎn)的承載力和剛度相對(duì)較高；節(jié)點(diǎn)豎板厚度越小，其塑性發(fā)展越充分，節(jié)點(diǎn)的滯回耗能能力越好。

［關(guān)鍵詞］裝配式交錯(cuò)桁架； 連接節(jié)點(diǎn)； 試驗(yàn)研究； 低周往復(fù)循環(huán)加載； 抗震性能

中圖分類號(hào)：TU391文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2018)07-0039-06

Experimental research on seismic behavior of connected joints of top chord of fabricated staggered truss with column

Sun Yanwen1, Qiu Jie2, Lian Ming2, Su Mingzhou2

(1 China Institute of Building Standard Design & Research Co., Ltd., Beijing 100048, China; 2 School of Civil Engineering, Xi′an University of Architecture and Technology, Xi′an 710055, China)

Abstract:In order to study the seismic behavior of connected joints of top chord of fabricated staggered truss with column, low-cycle cyclic loading experiments were conducted on four 1∶2 scaled joint specimens of top chord of fabricated staggered truss (composed of the external ring plate and end plate type) with square tubular steel reinforced concrete column. The joint′s failure mode, bearing capacity, stiffness, ductility and strain response law were studied. Experimental results show that there may be three failure modes such as vertical plate shear failure, column compression bending failure and joint plate tearing failure in the joint specimens of top chord of fabricated staggered truss (composed of the external ring plate and end plate type) with square tubular steel reinforced concrete column. When the eccentricity is small, the bearing capacity and stiffness of the joints are relatively high; the smaller the thickness of the vertical joint plate is, the more fully developed plasticity is and the better the hysteretic energy dissipation capacity is.

Keywords:fabricated staggered truss; connected joint; experimental study; low-cycle cyclic loading; seismic behavior

*國(guó)家重點(diǎn)研發(fā)計(jì)劃（2016YFC0701503）。

作者簡(jiǎn)介：孫艷文，碩士，高級(jí)工程師，Email：22979977@qq.com。