分段封闭箍筋小跨高比连梁改进方案的计算机仿真分析

The Computerized Simulation Analysis on Improved Scheme of Deep Reinforced Concrete Coupling Beam with Closed Stirrups Section

在分段封闭箍筋小跨高比连梁配筋方案的基础上,利用无黏结技术提出一种改进方案,即在连梁端部h/4的连梁长度范围内,在受力纵筋外部套上塑料套管阻止钢筋与混凝土黏结,并用ANSYS 9.0分析了连梁的破坏形态、承载力、刚度、裂缝开展等性能.结果表明,改进方案与原方案相比具有更好的延性和耗能能力、较高的承载力,并且弯曲裂缝发展较充分.

Based on deep reinforced concrete coupling beam with closed stirrups section, using non-bonding technology, this paper presents an improved scheme, which among length of h/4 coupling beam＇s height, puts plastic sleeve around force longitudinal reinforcement to prevent adhesion between reinforcement and concrete, and using ANSYS 9.0 software analysizes failure modes, bearing capacities, stiffness, cracks and other capacities. Results show that deep reinforced concrete coupling beam with closed stirrups section has better ductility and energy dissipation capacity, higher capacity and more fully developed curve cracks compared with the original scheme.