- 摘 要
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(中原工學院建筑工程學院， 鄭州 451191)
［摘要］基于已有的異形鋼管混凝土-鋼梁節(jié)點，提出并設計了帶側(cè)板連接新型T形鋼管混凝土柱-鋼梁節(jié)點。通過擬靜力加載試驗，系統(tǒng)分析了新型T形鋼管混凝土柱-鋼梁節(jié)點的受力機理及抗震性能，分析了節(jié)點的滯回曲線、骨架曲線、承載能力等各項抗震指標。同時探討了在低周反復荷載作用下，節(jié)點破壞特征及抗震性能。結果表明：隨著荷載的增加，節(jié)點在屈服以后能夠產(chǎn)生較強的耗能能力，具有良好的抗震性能。同時由于側(cè)板的設置，使得塑性鉸出現(xiàn)在鋼梁上，形成梁鉸破壞機制，滿足建筑結構所要求的“強柱弱梁，強節(jié)點弱構件”的抗震設計。
［關鍵詞］新型T形鋼管混凝土柱；側(cè)板連接；鋼梁；節(jié)點；抗震性能
中圖分類號：TU399 文獻標識碼：A文章編號：1002-848X(2021)14-0075-06
Research on the seismic performance of new T-shaped concrete-filled steel tube column-steel beam joint
ZHAO Yi, NIU Zhonghao, LI Hao
(School of Civil Engineering and Architecture, Zhongyuan University of Technology, Zhengzhou 451191， China)
Abstract:Based on the existing special-shaped concrete-filled steel tube（CFST）column-steel beam joints, a new T-shaped CFST column-steel beam joints with side plates were proposed and designed. Through the pseudo-static loading test, the mechanical mechanism and seismic performance of the new T-shaped CFST column-steel beam joints were systematically analyzed, and the hysteretic curve, skeleton curve, bearing capacity and other seismic indexes of the joints were analyzed. At the same time, the failure characteristics and seismic performance of joints under low cycle repeated loads were discussed. The results show that with the increase of load, the joints can produce strong energy dissipation capacity after yielding, and have good seismic performance. Moreover, due to the setting of side plate, plastic hinge appears on the steel beam, forming the beam hinge failure mechanism, which meets the seismic design requirements of "strong column and weak beam, strong joint and weak component".
Keywords:new T-shaped concrete-filled steel tubular column； side plate connection； steel beam； joint； seismic performance
*國家青年自然科學基金資助項目（51408621），河南省青年骨干教師 （2017GGJS119）。
作者簡介：趙毅，博士，副教授，碩士生導師，Email:zhaoyi091218@163.com；通信作者：牛中浩，碩士研究生，Email:niuhao0712@qq.com。
