工程科学与技术2018，Vol.50Issue(3)：209-215,7.DOI:10.15961/j.jsuese.201701018
新型装配式混凝土框架梁柱节点抗震性能
Seismic Behavior of a New Type Prefabricated Concrete Frame Beam-column Connections
摘要
Abstract
In order to comprehensively evaluate the seismic performance of a new type strand anchored precast concrete frame connection,low-cycle repeated loading tests were conducted on 4 prefabricated assembly connections and 1 cast-in-situ connection.The destructive processes and destruction patterns of each connection was investigated,the skeleton curves,energy dissipation capacity and stiffness degradation of the connec-tions were analyzed.The experimental results show that the beam bending damage occurs at all connections,and there are only a few tiny cross-cracks in node area.In the pre-loading stage,all the prefabricated connections have less energy-consuming capacity than the XJ nodes,and the pre-fabricated connections PC1 and PC2 with additional rebar,the post-loading energy dissipation capability is stronger than that of the XJ and prefab-ricated PC3 and PC4 connections.Due to the prefabricated connections in the keyway there are new and old concrete interface,resulting in that the stiffness of all the prefabricated connections are less than that of XJ connection.After entering the yielding stage,the keyway hoop encryption and additional reinforcement,making PC1 and PC2 connections stiffness greater than XJ node.In general,the additional reinforcement contributes to the carrying capacity and energy dissipation of the connections.Based on the experimental results,the parametric analysis of the connections was carried out by ABQUAS.The influences of different parameters on the mechanical properties of the prefabricated connections were obtained by changing the axial compression ratio,the concrete strength grade and the additional steel bar diameter in the nodal area.关键词
装配式/预应力/梁柱节点/抗震性能/有限元Key words
precast style/prestressed/beam-to-column connections/seismic performance/finite element分类
建筑与水利引用本文复制引用
于建兵,郭正兴,郭悬..新型装配式混凝土框架梁柱节点抗震性能[J].工程科学与技术,2018,50(3):209-215,7.基金项目
国家重点研发计划资助项目(2016YFC0701703) （2016YFC0701703）
扬州市青年基金资助项目(YZ2017101) （YZ2017101）
