钢筋混凝土梁-薄墙平面内偏心连接节点试验研究  

EXPERIMENTAL RESEARCH ON THE R. C. ECCENTRIC IN-PLANE BEAM-THIN WALL JOINT

作　　者：王志军[1] 柏洁[1] 白绍良[1] 

机构地区：[1]重庆大学土木工程学院,重庆400045

出　　处：《工业建筑》2010年第1期39-45,共7页Industrial Construction

基　　金：重庆市科委科技攻关项目(07197)资助

摘　　要：针对梁纵筋锚固条件、墙肢内梁配箍率及梁截面高度等参数,通过6个梁-薄墙平面内偏心连接节点的低周反复加载试验以及非线性有限元的模拟和参数分析,模拟结果与试验吻合较好。试验与分析结果表明:保证梁纵筋直段锚固长度后,采取弯锚措施和加大墙肢内梁配箍率都可以改善节点受力和延性,但弯锚措施综合效果更好;梁纵筋的直段锚固长度是节点有效传力的基本保证;节点区配置足够的箍筋和采用合理的锚固措施,能够保证偏心连接节点的承载力、变形和延性要求。Six in-plane beam-thin wall joints were tested under reversed cyclic loading, considering various design parameters such as longitudinal bar＇ s anchorage condition, stirrup reinforcement ratio of beam within the wall and beam height. Using the nonlinear FEM, numerical simulations of the test specimens and parametric analysis were performed. There is a good agreement between the numerical simulations and the test results. Given a certain straight anchorage length, both the 90-degree hooked anchorage of longitudinal bars and larger stirrup ratio of the beam within the wall can improve the carrying capacity and ductility of the joint, but the 90-degree hooked anchorage is better as far as the overall performance is concerned. The longitudinal bar＇ s straight anchorage length is the basic guarantee of the effective force transmission. The carrying capacity, deformation and ductility of joint can be ensured with the rational stirrup ratio and anchoring method of the joint.

关 键 词：梁-薄墙肢平面内连接节点 偏心节点 锚固长度 受力性能 钢筋混凝土 

分 类 号：TU375[建筑科学—结构工程]