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（1 揚(yáng)州市人民政府抗震人防辦公室，揚(yáng)州 225009；2 揚(yáng)州大學(xué)建筑科學(xué)與工程學(xué)院， 揚(yáng)州 225127）

［摘要］對(duì)6個(gè)桁架式鋼骨混凝土梁柱節(jié)點(diǎn)試件進(jìn)行了低周往復(fù)荷載試驗(yàn)，研究軸壓比、預(yù)應(yīng)力、節(jié)點(diǎn)核心區(qū)交叉斜腹桿等因素對(duì)試件滯回曲線、骨架曲線、剛度退化、耗能能力等性能的影響。試驗(yàn)結(jié)果表明：6個(gè)試件發(fā)生了梁端塑性破壞；桁架式鋼骨混凝土梁柱節(jié)點(diǎn)破壞經(jīng)歷了初裂、通裂、極限、破壞4個(gè)特征階段；軸壓比對(duì)節(jié)點(diǎn)剛度退化及極限承載力有明顯影響，軸壓比越大，節(jié)點(diǎn)極限承載力越高，剛度退化越快；節(jié)點(diǎn)核心區(qū)交叉斜腹桿對(duì)試件承載能力的影響較大，含有交叉斜腹桿試件的耗能能力均好于未設(shè)置交叉斜腹桿的試件。

［關(guān)鍵詞］桁架式鋼骨混凝土結(jié)構(gòu)； 框架節(jié)點(diǎn)； 軸壓比； 預(yù)應(yīng)力； 抗震性能； 斜腹桿

中圖分類(lèi)號(hào)：TU375-4文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2020)23-0086-06

Experimental research on the seismic performance of  truss-type steel reinforced concrete beam and column joint

XU Hong1, MENG Ruizhi2, CAO Dafu2, CAO Siqi2, GUAN Yiqing2

(1 Anti Earthquake Civil Air Defense Office of Yangzhou Municipal People′s Government, Yangzhou 225009,China; 2 College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China)

Abstract:Low cyclic loading test of six truss-type steel reinforced concrete beam and column joint specimens was conducted, the effects of axial pressure ratio, pre-stressing force, cross diagonal web members in the core area of joint on the properties of hysteresis curve, skeleton curve, stiffness degradation, energy dissipation capacity and angle steel strain were studied. The test results show that six specimens underwent plastic failure of the beam ends; the failure of the  truss-type steel reinforced concrete beam and column joint has gone through four characteristic stages: initial crack, through crack, limit and failure. The axial pressure ratio has significant influence on the stiffness degradation and ultimate bearing capacity. With the increase of axial pressure ratio, the ultimate bearing capacity of the joint increases gradually, while the stiffness degradation decreases more fast; the cross web members in the core area of joint has evident influence on the bearing capacity of components, and the energy dissipation capacity of the components with cross diagonal web members are greater than those without cross diagonal web members.

Keywords:truss-type steel reinforced concrete structure; frame joint； axial pressure ratio； pre-stressing force; seismic performance； cross diagonal web member

*國(guó)家自然科學(xué)基金資助項(xiàng)目(51578478)。

作者簡(jiǎn)介：徐紅，學(xué)士，高級(jí)工程師，Email:1057080710@qq.com；通信作者：曹大富，碩士，教授，Email: dfcao@yzu.edu.cn。