钢板剪力墙边缘构件的计算方法研究

CALCULATION METHODS FOR BOUNDARY ELEMENTS IN STEEL PLATE SHEAR WALLS

基于钢框架-钢板剪力墙的理想破坏机制,根据梁、柱塑性铰位置,推导了钢板剪力墙边缘构件的计算公式,给出了钢板剪力墙、梁和柱之间的强度关系。设计了一榀单跨五层钢框架-钢板剪力墙全尺寸分析模型,采用大型通用非线性有限元软件ABAQUS 6.10对其进行了非线性数值分析。结果表明:顶梁能为单侧拉力场提供足够的抗弯承载力,防止顶梁跨中形成塑性铰;各层钢板剪力墙承担的侧向荷载基本相同。表明按上述计算公式确定的边缘构件能够为钢板剪力墙提供足够的锚固强度,有效控制受压柱的塑性铰位置,防止柱中部形成塑性铰,使钢框架-钢板剪力墙实现理想的破坏机制,即"弱板强框架,强柱弱梁",达到双重抗震设防的目的。

Based on the ideal failure mechanism of steel frame-steel plate shear walls,this paper gives design formulas for boundary elements of steel plate shear walls and strength relationships between steel plate shear walls,beams and columns.A full scale analysis model of a one-bay five-story steel frame with steel plate shear walls was designed according to the calculation formulas mentioned above.Nonlinear numerical analysis is conducted using the nonlinear finite element software ABAQUS 6.10.Results obtained from this study are as follows:The top beam can provide enough bending strength to prevent a one-sided tension field from causing a mid-span plastic hinge to form.The single story lateral load carried by steel plate shear walls is basically uniform.This shows that the boundary elements designed by the calculation formulas discussed in the paper can provide enough anchor strength for steel plate shear walls,effectively control the location of plastic hinges,and prevent the formation of column mid-height plastic hinges.The ideal failure mechanism is achieved for steel frame-steel plate shear walls,namely weak plate strong frame,strong column weak beam.The double aseismic fortification aim is achieved.