摘要
近年来,随着国家大力推动建筑工业化的发展,预制装配式剪力墙结构得到了广泛的应用。为了减少现场施工过程中的湿作业,在保证预制混凝土剪力墙接缝连接质量可控的基础上,提出了一种新型螺栓连接预制装配式混凝土剪力墙。在剪力墙构件受力核心区域(边缘构件)处的连接设计上采用“等强度替换”原则,即边缘构件处连接螺栓抗拉强度大于对应连接钢筋的抗拉强度。随后,结合国家相关现行规范,对螺栓连接预制装配式混凝土剪力墙承载力进行了计算,并与有限元模拟结果进行了对比验证。结果表明:正截面承载力计算值与有限元模拟结果基本吻合;通过对比剪力墙斜截面抗剪承载力计算值与有限元模拟值发现,对小剪跨比的剪力墙来说,其最大水平推力模拟值大于其抗剪承载力,剪力墙的破坏模式为剪切破坏,并与混凝土损伤云图进行了对比验证;水平接缝处抗剪承载力的计算结果表明螺栓连接剪力墙结合面在水平方向具有很大的安全储备,构件在加载过程中不会出现水平方向的相对剪切滑移。
In recent years,with the development of building industrialization,precast concrete shear wall has been widely used.To reduce the wet operation in the construction process and ensure the connection joint quality of precast concrete shear walls,a new bolted connection method for the precast concrete shear wall is proposed.In the core area of the shear wall,edge component,the design of the bolt number is based on the principle of equal strength replacement,the tensile strength of the bolt is much higher than the original steel bars.Then,according to the current national concrete design code,the bearing capacity of the bolt connected shear wall is calculated and compared with the finite element simulation results.It shows that The calculated value of normal section bearing capacity is consistent with the finite element simulation results;Through the calculation of shear capacity,it is concluded that the shear failure occurs in the wall with a low shear span ratio, which is compared with the damage cloud chart of concrete. The calculation of the shear capacity of thehorizontal joint shows that the bolt connection has a great safety reserve in the horizontal direction, and thereis no horizontal slip in the loading process.
作者
吴水根
张海鹏
潘钻峰
顾征宇
WU Shuigen;ZHANG Haipeng;PAN Zuanfeng;GU Zhengyu(Tongji Architectural Design(Group)Co.,LTD.,Shanghai 200092,China;School of Civil Engineering,Tongji University,Shanghai 200092,China;Shanghai Tobacco Group Co.LTD.,Shanghai 200082,China)
出处
《结构工程师》
2023年第1期8-14,共7页
Structural Engineers
基金
国家自然科学基金项目(52078368)。
关键词
预制装配式
混凝土剪力墙
螺栓连接
有限元
承载力
precast
concrete shear wall
bolted connection
finite element
bearing capacity
作者简介
吴水根(1965-),男,教授级高级工程师,浙江湖州人,一级注册结构工程师,主要从事装配式混凝土结构的研究。Email:shuigen111@163.com;联系作者:潘钻峰(1981-),男,教授,江苏扬州人,主要从事装配式混凝土结构和预应力混凝土结构的研究。E-mail:zfpan@tongji.edu.cn。
