【摘要】 采用高延性纤维混凝土(DFRC)改善半刚性连接钢框架内填RC剪力墙结构(PSRCW)的抗震性能和变形能力,设计1榀半刚性连接钢框架内填DFRC剪力墙试件(SDFRCW),并进行拟静力试验,研究其破坏机理、滞回性能、刚度退化、延性及耗能能力,并与已有文献的试验结果进行比较可得:1DFRC良好的拉伸性能和应变硬化效应,可以有效控制内填墙体的斜裂缝稳定发展,实现延性剪切破坏模式;2SDFRCW试件的开裂位移、屈服位移和极限位移明显高于PSRCW试件,可见采用DFRC能显著提高SDFRCW结构的层间变形能力;3SDFRCW试件破坏时,内填DFRC剪力墙已出现较宽的主斜裂缝,但墙体始终保持良好的整体性,试件承载力和刚度退化缓慢,说明采用DFRC可显著提高墙体的耐损伤能力,减少结构的震后修复费用;4SDFRCW结构具有良好的层间变形能力,能有效控制结构在小震和中震作用下的变形,满足大震作用下的变形能力和耗能要求。更多还原

【Abstract】 In order to improve seismic behavior and deformation capacity of semi-rigid steel frames with RC infill walls( PSRCWs),ductile fiber reinforced-concrete( DFRC) was used to replace conventional reinforced concrete( RC). Test on semi-rigid steel frames with DFRC infill walls( SDFRCWs) was designed and conducted to study the failure mechanism,hysteretic performance,stiffness degradation,ductility and energy dissipation capacity. Comparing the test results with the existing literature,it can be observed that:( 1) the excellent tensile behavior and tensile strainhardening behavior of DFRC can effectively control the development of shear diagonal crack of the infill walls,and achieve a ductile shear damage mode;( 2) the crack displacement,yield displacement and ultimate displacement of the SDFRCWs are obviously higher than the PSRCWs,which indicates that the inter-story deformation capacity of the SDFRCW structure can be improved significantly by using the DFRC;( 3) when the SDFRCW specimen fails,the wide main diagonal crack has occured in the infill walls of the DFRC,but the wall can maintain the integrity,and the bearing capacity and stiffness of the specimens degrades slowly,which shows that the damaged resistance capacity of the infill walls is significantly improved and the associated repairing expenses after strong earthquakes can be reduced;( 4) the SDFRCW structure has good inter-story deformation capacity,which can effectively control the damage in small and medium earthquakes,and can satisfy the requirements of deformation and energy dissipation capacity under large earthquakes.更多还原