钢-竹组合框架结构拟静力试验研究

QUASI-STATIC TEST OF STEEL-BAMBOO COMPOSITE FRAME STRUCTURES

为研究钢-竹组合框架结构抗震性能,以节点处是否设置加劲肋为控制参数制作了两榀单跨两层钢-竹组合框架,通过拟静力试验探讨钢-竹组合框架结构的破坏机理、滞回特性、延性性能、节点域剪切变形性能等,并将两榀框架的试验结果进行对比和分析。结果表明:钢-竹组合框架结构的破坏是由于框架节点域受到较大的剪切变形使得框架柱的竹胶板和槽钢产生脱胶,导致框架柱失去承载力而发生破坏,节点处设置加劲肋的框架其整体性能要优于节点处未设置加劲肋的框架,更加符合节点半刚性的设计要求。钢-竹组合框架结构具有良好的抗震性能,能够满足抗震的基本要求,应在今后的研究中不断改进设计,充分发挥其作为新型组合结构的优越性。

In order to study the seismic behavior of steel-bamboo composite frame structures,two single-bay two-story steel-bamboo composite frames were made with stiffeners or not. The failure mechanism,hysteresis characteristics,ductility performance and shear deformation of the composite structures were discussed by pseudo-static test. And experimental results of the two frames were compared and analyzed. Results showed that the destruction of steelbamboo frame structures was caused by debonding between bamboo and steel of the columns under shear deformation,which eventually led to bearing capacity loss and damage. The frame with stiffeners at the joint had better overall performance and naturally could meet design demands better. The steel-bamboo composite frame structures indicated excellent seismic behavior and were able to meet the basic requirements under earthquake. More reasonable designs may contribute to giving full play to the superiority of this new composite structure in the future.