摘要
可靠的节点连接是屈曲约束支撑混凝土框架结构应用的关键技术之一。利用有限元分析软件ABAQUS对一种用于该结构的节点形式,建立边节点的有限元分析模型。研究在不同受力状态下节点裂缝和变形发展过程,明确节点的极限状态和破坏状态,并系统分析了轴压比、梁配筋率和梁柱线刚度比等对节点承载力和变形性能的影响规律。研究结果表明该节点形式通过适当的设置可以满足"强节点,弱构件"的要求。轴压比对节点的性能影响很小;梁柱线刚度比对节点的弹性和弹塑性性能影响显著;梁配筋率既影响节点的承载力和变形性能,又决定着节点的破坏形式。
The reliability of connecting joints is one of the key techniques in the application of buckling restrained braced frame structures.A finite element analysis model is established by using ABAQUS to connect the exterior joint of the structure.The development of cracks and deformations is studied,and the ultimate state and the failure mode are determined.Then the influence of axial compression ratio,reinforcement ratio,linear stiffness ratio of beam and column on the capacity and deformation performance of the joint are analyzed systemically.The study shows that the connection with appropriate design is shown to satisfy the strong connection/week beam requirement.The axial compression ratio has very small effect on the connection;linear stiffness ratio of beam and column has apparent effect on the elastic and inelastic behavior of the connection;the reinforcement ratio of beam has effect on the capacity and deformation performance,but also determines the failure modes of this joint.
出处
《防灾减灾工程学报》
CSCD
北大核心
2017年第1期134-139,共6页
Journal of Disaster Prevention and Mitigation Engineering
基金
国家自然科学基金项目(51178276)资助
关键词
屈曲约束支撑
有限元分析
弯矩—转角曲线
力学性能
边节点
buckling restrained brace
finite element analysis
moment-rotation curves
mechanical behavior
exterior joint
