摘要
为了加强大跨度钢-混凝土组合梁的界面黏结效果,结合实际工程的构造提出十字型开孔钢板剪力键。通过1组栓钉剪力键和3组十字型开孔钢板剪力键的推出试验,研究了其破坏模态及荷载-滑移曲线。结果表明:相近截面面积的十字型开孔钢板剪力键抗剪性能远高于栓钉剪力键,截面宽度和混凝土强度等级对十字型开孔钢板剪力键抗剪性能的影响最大;同时十字型开孔钢板剪力键的抗剪承载力随着开孔钢板厚度的增加而提高;抗剪刚度随着剪力键高度的增加有一定的提高。
In order to strengthen the interfacial bonding effect of long-span steel-concrete composite beams,a cross-shaped perfobond strips(PBL)was proposed based on the actual engineering structure.The push-out tests of 1 set of stud strips and 3 sets of cross-shaped PBLs were conducted.The failure modes and load-displacement curves of strips were studied.The results showed that the shear strength of cross-shaped PBL with similar cross-section areas was much higher than that of stud strips.The cross-section width and concrete strength grade had the greatest influence on the shear performance of cross-shaped PBLs.The shear capacity of cross-shaped PBLs increased with the increase of the thickness of perfobond strips.The shear stiffness increased with the increase of strip height.
作者
武永丽
王秀丽
李芳军
高越晋
张祺
WU Yongli;WANG Xiuli;LI Fangjun;GAO Yuejin;ZHANG Qi(China Railway 21 Group No.2 Engineering Co.,Ltd.,Lanzhou 730070,China;School of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Western Center of Disaster Mitigation of Ministry of Education,Lanzhou 730050,China)
出处
《工业建筑》
北大核心
2023年第7期124-129,共6页
Industrial Construction
基金
国家重点研发计划(2019YFD1101004)
甘肃省建设科技攻关项目(JK2020-29,JK2020-26)。
