摘要
为研究竖向拼缝对预制装配L形混凝土剪力墙抗震性能的影响,对3个剪跨比为2.15的足尺L形混凝土剪力墙试件进行了低周反复荷载试验。拼缝采用无筋键槽形式,其中2个装配试件的竖向拼缝位置不同,另1个是整浇对比试件。试验结果表明:竖向拼缝对墙体的裂缝发展有一定影响,试件的裂缝在发展至拼缝键槽处后,会错动至键槽的尖点后再继续发展;竖向拼缝对试件的水平承载力及破坏形态没有明显影响,但对试件的延性及耗能有显著的影响,2个装配试件的正向位移延性分别提高了0.2%和14%,负向位移延性提高了8%和14%,耗能能力提高了30%,但竖向拼缝的位置对于耗能能力的影响不大;穿过竖向拼缝的水平钢筋没有发生应变突增或提前屈服。
To research how vertical joints effect the seismic performance of prefabricated L-shaped shear wall,three L-shaped shear walls with shear span ratio of 2.15 were studied experimentally by the quasi-static test system.The vertical joints which are in different positions in two prefabricated wall are unreinforced keyway,and the other one is cast-in place.The test results show that the crack pattern has some difference with cast-in place shear wall.Cracks will go not cross the vertical joints directly,but crossing the vertical joints from its shear key shape point.The vertical joints have little effect on horizontal bearing capacity and failure modes,but ductility and energy dissipation are influenced significantly.The forward displacement ductility of two L-shaped wall with vertical joints increase by 0.2% and 14% repectively while the backward displacement ductility increases by 8% and 14%,and energy dissipation capacity increases by 30%.The position of vertical joints has little effect on energy dissipation.In addition,there were no sudden increase of strain and yield in advance in horizontal reinforcement crossing the vertical joints.
作者
秦士洪
范世杰
张瀑
李浩然
江林辉
QIN Shihong;FAN Shijie;ZHANG Pu;LI Haoran;JIANG Linhui(School of Civil Engineering, Chongqing University, Chongqing 400045, P. R. China;Sichuan Institute of Building Research, Chengdu 610081, P. R. China)
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2019年第1期36-47,共12页
Journal of Chongqing University
基金
重庆市"社会事业与民生保障科技创新专项"(cstc2016shmszx30008)~~
