摘要
为研究条石砌筑石墙的抗震性能及滞回特性,进行了5片干砌甩浆石墙试件的低周水平反复荷载试验。主要研究参数包括砂浆强度和压应力。通过试验研究了干砌甩浆承重石墙的破坏形态、强度、滞回曲线、骨架曲线、变形能力、耗能能力和刚度退化规律。试验结果表明:石墙的最终破坏形态主要受压应力水平的影响;受剪承载力随砂浆强度和压应力水平的提高而增加,但提高压应力水平对石墙受剪承载力的影响更加显著;条石砌筑石墙的滞回曲线呈现饱满的梭形,表现出良好的耗能性能,其与砖砌体等其它砌体结构的滞回环在弹塑性阶段呈现明显的滑移捏缩现象存在明显差异。
Five dry-laid stone masonry walls were tested under cyclic loading to investigate their seismic performance and hysteretic characteristics.The main parameters were mortar strength and normal compressive stress.Based on the test results,the failure modes,strength,hysteretic curves,skeleton curves,deformation capacity,energy dissipating capacity and stiffness degradation of stone masonry walls were studied.It is indicated that normal compressive stress is the most important parameter that affects the failure modes of stone masonry walls.The shear strength of stone masonry walls increases along with the increases of mortar strength and normal compressive stress,though the influence of normal compressive stress is much more remarkable.The hysteretic curves of all stone masonry walls are of a plump shuttle shape,indicating that the specimens have good energy dissipating capacity.Obvious difference is discovered between stone masonry walls and other masonry wall,such as brick masonry walls,while pinching of hysteretic curves could be observed when these masonry walls experience large plastic deformation.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2011年第3期57-63,共7页
Journal of Building Structures
基金
国家自然科学基金项目(50978107)
教育部新世纪优秀人才支持计划项目(NCET-06-0571)
国家"十一五"科技支撑计划项目(2006BAJ06B03)
华侨大学基本科研业务费专项基金项目(JB-JC1007)
厦门市科技计划项目(3502Z20093029)
关键词
石结构
干砌石墙
拟静力试验
抗震性能
滞回特性
stone structure
dry-laid stone masonry wall
pseudo-static test
seismic behavior
hysteretic characteristic
