- 摘 要
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（1 揚州市市政建設處， 揚州 225002； 2 揚州大學建筑科學與工程學院， 揚州 225127；3 橋梁結構安全控制湖南省工程實驗室（長沙理工大學）， 長沙 410015； 4 揚州大學廣陵學院， 揚州 225127）
［摘要］通過3個預應力及1個非預應力型鋼混凝土梁-角鋼混凝土柱節(jié)點試件的低周往復荷載試驗，研究了此類梁柱節(jié)點的破壞形態(tài)、滯回曲線、耗能能力、剛度退化、變形恢復性能和延性，分析了軸壓比和預應力度對節(jié)點滯回性能的影響。結果表明：達到水平峰值荷載前，所有節(jié)點試件均首先發(fā)生梁端彎曲破壞，達到峰值荷載時，節(jié)點核心區(qū)混凝土被斜向壓碎，發(fā)生剪切破壞，最終呈現(xiàn)出混合破壞形態(tài)；所有節(jié)點試件的水平荷載-位移滯回曲線均呈現(xiàn)出一定的捏縮；通過提高預應力度可以提高此類節(jié)點核心區(qū)的抗剪承載力，但降低了剪切變形的延性，過高的軸壓比會一定程度上降低節(jié)點核心區(qū)的抗剪承載力以及剪切變形的延性。此外，建議設置剪力栓加強角鋼與混凝土保護層的粘結能力。
［關鍵詞］型鋼混凝土梁；角鋼混凝土柱；節(jié)點；預應力；滯回性能
中圖分類號：TU398-9文獻標識碼：A文章編號：1002-848X(2021)04-0101-08
Experimental study on hysteretic behavior of prestressed steel reinforced concrete beam-angle steel concrete column frame joints
CHEN Xiaofei1,2, WANG Kun2,3, LUO Huihui4, LI Congqi2, GU Mingjun2, ZHA Zhiyuan2
(1 Yangzhou Municipal Construction Office, Yangzhou 225002, China;2 College of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, China;3 Hunan Province Engineering Laboratory of Bridge Structure (CSUST), Changsha 410015, China;4 College of Guangling, Yangzhou University, Yangzhou 225127, China)
Abstract:Through the low cyclic load test of three prestressed and one non-prestressed steel reinforced concrete beam-angle steel concrete column frame joint specimens, the failure modes, hysteretic curves, energy dissipation capacity, stiffness degradation, deformation recovery performance and ductility were investigated, and influence of axial compression ratios and prestressing levels on hysteretic behavior of joints were analyzed. The results show that all joint specimens finally behaved mixed failure mode, in which flexural failure at beam ends before peak loads and shear failure in the joint core area with diagonally concrete crushing at peak loads are observed. And the lateral load-displacement hysteretic curves present a certain of pinch of all joints. With the increasing of prestressing levels, the shear capacities of the core area of such joints can be improved the ductility of shear deformation is decreased. An excessively high axial compression ratio will reduce the shear capacities of the core area of the joints and the ductility of shear deformation to a certain extent. In addition, it is recommended to set up shear bolts to strengthen the bonding ability between the angle steel and the concrete protective layer.
Keywords:steel reinforced concrete beam;angle steel concrete column;joint;prestressing;hysteretic behavior
*長沙理工大學橋梁結構安全控制湖南省工程實驗室開放基金資助項目(16KD01)，江蘇省“六大人才高峰”人才項目(2017-JZ-038)，揚州大學優(yōu)秀青年骨干教師人才項目（2016），國家自然科學基金項目(51508495, 51578478)。
作者簡介：陳曉飛，碩士，高級工程師，Email: 38140823@qq.com；通信作者：王琨，博士，副教授，Email: wangkun@yzu.edu.cn。
