预应力混凝土梁-型钢混凝土柱新型框架节点受剪承载力计算方法  

SHEAR CAPACITY CALCULAITON OF PRESTRESSED CONCRETE BEAM-STEEL REINFORCED CONCRETE COLUMN FRAME JOINTS

作　　者：潘钻峰 葛雄 曾滨[3] 许庆[3] PAN Zuan-feng;GE Xiong;ZENG Bin;XU Qing(State Key Laboratory for Disaster Reduction of Civil Engineering,Tongji University,Shanghai 200092,China;Yunnan Design Institute Group Co.LTD,Kunming 530100,China;Central Research Institute of Building and Construction of MCC Group,Beijing 100088,China)

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092 [2]云南省设计院集团有限公司,昆明530100 [3]中冶建筑研究总院有限公司,北京100088

出　　处：《工程力学》2024年第4期29-38,共10页Engineering Mechanics

基　　金：国家自然科学基金项目(52078368);国家自然科学基金重点项目(52038010)。

摘　　要：梁柱节点受剪承载力计算是混凝土框架结构节点抗震设计的关键点之一,由于节点剪力传递机理与构造的复杂性,目前尚未形成完善的节点受剪承载力计算理论。该文阐述了预应力混凝土梁-型钢混凝土柱新型框架节点的受力机理,并基于桁架模型和斜压杆模型,提出了一种同时考虑预应力筋与型钢贡献的节点受剪承载力计算方法。开展了新型节点受力性能拟静力试验,分别选取了梁端破坏与节点剪切破坏两种破坏形式的节点试验数据,对所建立的新型节点受剪承载力计算方法进行了验证评估,结果表明,该文提出的预应力混凝土梁-型钢混凝土柱框架节点承载力计算方法具有较好的精度。Shear capacity calculation of beam-column joint is one of the keys in seismic design of reinforced concrete frame structures.At present,the theory for calculation of shear capacity of beam-column joints needs to be improved due to the complexity of shear transfer mechanism and joint construction requirements.According to the analysis and comparison of existing theories for shear strength of joints,the shear mechanism of prestressed concrete beam-steel reinforced concrete column frame joints is elaborated.Based on truss model and diagonal compression strut model,a new calculation method for shear capacity of beam-column joints is proposed,with consideration of both effects of prestressing tendons and structural steel.Experimental data of beam-column joint specimens with two different failure modes,namely bending failure at the beam ends and shear failure of joints,are used to verify the proposed calculation method.The theoretical results are shown to be consistent with the experimentally observed values of beam-column joints.

关 键 词：预应力混凝土梁 型钢混凝土柱 节点 受剪机理 受剪承载力 

分 类 号：TU375.4[建筑科学—结构工程] TU398.9