钢筋混凝土剪力墙的延性

本文根据“钢筋混凝土弹塑性抗震结构的机构控制理论”,研究了R.C.剪力墙的延性问题。分析了影响因素,指出改善剪力墙延性的关键在于提高连系梁的延性。根据连系梁的不同跨高比,提出两种人工塑性铰构造方案。试验分析表明,采用本方案可以避免连系梁产生剪切破坏和剪切滑移,延性较大。通过设计,可控制使结构出现最佳耗能机构,提高R.C.剪力墙的抗震能力,并使内力、位移及延性分析简化。

Ductility of Reinforced Concrete Shear Walls

Based on the viewpoint of the controlled mechanism theory of earthquake-resistant of reinforced concrete elasto-plastic structures,this paper presents two construction models of artificial plastic hinges,one of which is for general coupling beams,the other is for stout coupling beams,analyses the failure mechanism of shear walls and gives some conclusions about the ductility and strength of such walls.Sixteen artificial plastic hinges and three general reinforcement beams have been investigated.It is shown that the rotation ductility coefficient of coupling beam presented in this paper can reach about 12.By using these inserted artificial plastic hinges,the failure mechanism of R.C.shear wall can be controlled in the best way and the ability to resist earthquakes is better than conventional structures.Besides,all the calculations of internal forces,displacements and ductility for both the full structure and the coupling beams are much simpler.