应用简化的软化桁架模型设计框架外节点  

DESIGN FOR EXTERNAL JOINT OF FRAMEWORK WITH A SIMPLIFIED SOFTENED TRUSS MODEL

作　　者：刘华新[1] 毕重[1] 王清湘[2] 

机构地区：[1]辽宁工学院土木建筑系,锦州121001 [2]大连理工大学海岸与近海工程国家重点实验室,大连116024

出　　处：《工业建筑》2008年第4期41-43,共3页Industrial Construction

基　　金：国家自然科学基金资助项目(50378010);辽宁省教育厅高校科研基金资助项目(200320085)

摘　　要：简化的软化桁架模型源于拉压杆的概念,其满足带裂缝混凝土的平衡条件、相容条件和本构关系。在介绍简化的软化桁架模型的传力途径、设计步骤的基础上,考虑包括混凝土强度、竖向箍筋和水平箍筋的数量等参数的影响,用简化的软化桁架模型对现浇钢筋混凝土框架外节点进行抗剪强度分析和设计。通过对一个现浇钢筋混凝土框架外节点的验算,并与混凝土结构设计规范(GB 50010-2002)规定计算方法进行比较,计算结果基本一致,证明了所提出的简化的软化桁架模型的有效性、实用性。A Simplified softened truss model originates from concept of strut-tie lever and satisfies equilibrium, compatibility, and the constitutive laws of cracked reinforced concrete. It is expounded transitive path and design procedure of the simplified softened truss model. A simplified softened truss model for design and analyses the shear strength of external joint of frmework is proposed, the parameters reviewed include the concrete strength, the amount of vertical hoop and the amount of horizontal hoop l It is therefore recommended that the current shear design procedures for external joint of framework be reformed and utilized to incorporate the actual shear-resisting mechanisms as postulated by the simplified softend truss model, and the calculated values are in good agreement with the check values.

关 键 词：软化桁架模型 外节点 抗剪强镀 混凝土强度 竖向箍筋 水平箍筋 

分 类 号：TU323.4[建筑科学—结构工程]