摘要
通过对4榀两层两跨的装配式减震墙板框架、空框架和普通墙板框架的低周反复加载试验,对比研究了装配式减震墙板RC框架结构的破坏特征、滞回性能、承载能力、刚度退化和耗能能力等。试验结果表明:装配式减震墙板框架结构的滞回曲线饱满,耗能能力强,其等效黏滞阻尼系数在0.13以上,较装配式空框架和普通墙板框架有明显提高;横条型和竖条型墙板对装配式减震墙板框架结构的抗震性能影响不大,二者对框架结构水平承载力和抗侧刚度的附加效应均远小于普通墙板,可减少对装配式框架造成过强约束;装配式减震墙板框架结构的承载力衰减速率和刚度退化速率都较普通墙板框架结构缓慢,增强了结构强震作用下的承载能力;当结构层间位移角达到1/50时,装配式框架中普通墙板端部开裂并被压碎,而减震墙板并未出现破坏。
By the low cyclic reversed loading tests on four specimens of two-story and two-bay precast frame including prefabricated damping wall-frame,bare frame,and conventional wall-frame,the comparative studies were conducted to investigate the failure characteristic,hysteretic behavior,degradation of bearing capacity and stiffness and energydissipation capacity of precast damping wall-RC frame structure. The experimental results indicate that,the precast damping wall-frame structure exhibits full hysteretic loops and good energy dissipation capacity. Its equivalent viscous damping coefficient reaches above 0. 13,which is more than that of precast bare frame and conventional wall-frame;the different damping wall types have little influence on the seismic performance of precast damping wall-frame,and both the horizontal damping wall and the vertical damping wall used in precast frame can increase its horizontal bearing capacity and lateral stiffness. However, these additional effects to the frame are relatively small compared to conventional walls,so their excessive restraint effects to the precast frame can be relieved. In comparison with the conventional wall-frame,the precast damping wall-frame performs well in bearing capacity and stiffness degradation,therefore it has a better load-bearing capability to resist strong earthquakes. When the inter-story drift ratio of precast frame specimens reaches 1 /50,the conventional walls are destroyed with end cracking and concrete crushing,while the damping walls still keep their function without any structural damage.
出处
《建筑结构学报》
EI
CAS
CSCD
北大核心
2016年第5期170-176,共7页
Journal of Building Structures
基金
国家自然科学基金项目(51178128)
国家自然科学基金青年基金项目(51508117)
广州市博士后科研项目启动经费(gdbsh2013011)
