提出由边缘约束梁柱和双层斜向条型钢构件组成的钢网格墙结构,通过对1:2缩尺的T型钢和槽钢钢网格墙结构模型进行低周往复试验和有限元模拟,研究钢网格墙结构的抗震性能及受力机理,并基于工程实际对其内嵌钢网格布置进行了优化建议.结果表明:钢网格墙具有良好的刚度、延性和承载能力,且T型钢钢网格墙性能优于槽钢钢网格墙;受侧向力时中部型钢率先屈服,而后向两侧延展;试件破坏方式为单根条型钢构件与鱼尾板连接处断裂,其余型钢仍可承载;试件破坏时的层间位移角均大于1/50,试件在每级荷载循环后的强度退化系数均在0.92以上,结构受力性能稳定;有限元模型能较好地模拟钢网格墙性能,试件有限元模拟的峰值荷载最大误差为13％;内嵌型钢网格抗侧力及耗能的占比均高于48％,能够较好地与钢框架协调抗侧及耗能,对结构主体在侧向力作用下有一定保护作用;前期耗能主要由内嵌钢网格提供,随着型钢残余变形及受压屈曲,钢网格耗能占比逐渐减小;提出了两侧型钢鱼尾板连接处互不干扰原则、最小水平角距及最小竖直角距概念、均布约束准则,可通过调整最小水平角距实现合理的钢网格墙布置.

To investigate the mechanical properties of the welded hollow spherical joint as a support of the suspend-dome structure,in consideration of the effect of hollow spherical wall thickness,steel tube diameter,and outer and inner rib forms , four specimens under compression-bending conditions were fabricated by using orthogonal method,to obtain load-displacement curves,moment-rotation curves,and failure modes,based on loading proc-esses and finite-element analysis.The welded hollow spherical joint as a support of the suspend-dome structure was further examined for its bearing capacity and initial rigidity while considering the support rib form.The findings sug-gested that under compression-bending conditions,the intersection at the welded hollow spherical joint and the steel tube experienced faster-developing stresses and were first to yield.The joint failed by buckling on the bending mo-mentum plane;the compression-bending capacity of the support joint and the joint stiffness were positively correlated with the hollow spherical thickness and steel tube diameter.The influence of the external rib on the mechanical prop-erties of the structure under compression-bending was not significant.A reasonable setting of the internal ribs of the welded hollow spherical joint in the bending plane can effectively improve the compression-bending capacity,but has little effect on the initial bending stiffness.