X型拉结筋对RC框架抗连续倒塌性能影响的非线性动力分析  

Nonlinear dynamic analysis of the effect of x-type tension cables on progressive collapse performance of RC frame

作　　者：柯长仁 张祥 Ke Chang-ren;Zhang Xiang(College of Civil Engineering and Environment,Hubei University of Technology,Wuhan 430068,China)

机构地区：[1]湖北工业大学土木建筑与环境学院,湖北武汉430068

出　　处：《工程抗震与加固改造》2022年第4期53-59,共7页Earthquake Resistant Engineering and Retrofitting

摘　　要：为了提高一般RC框架结构在局部构件失效下的抗连续倒塌性能,将X型拉结筋应用到抗连续倒塌的设计中。利用ABAQUS分别建立5层RC框架结构和增设X型拉结筋的RC框架结构,对两种结构在局部结构失效后进行非线性动力分析和对比。结果表明:在一般RC框架结构中应用了X型拉结筋后,结构的刚度增大,失效柱的竖向位移显著减小,尤其是角柱和长边中柱效果更好;构件失效后,X型拉结筋中的受拉筋产生的拉力,能够分担部分梁抗力,能提供结构更多的安全储备。In order to improve the resistance progressive collapse of RC frame structures under local structural failure,X-type tension cables are applied to the design of resistance progressive collapse.The RC frame structure with 5 layers and the RC frame structure with X-type tension cables are respectively established in ABAQUS,and the nonlinear dynamic analysis and comparison of the two structures after local structural failure are carried out.The results show that the stiffness of the RC frame structure increases after the application of X-type tension cables and the vertical displacement of the failure column decreases significantly,especially the angle column and the long-side middle column have better effect.After the failure of the component,the tension generated by the tension cables in the X-type tie bars can share part of the beam resistance and effectively improve the robustness of the structure.

关 键 词：连续倒塌 ABAQUS RC框架结构 拉结强度法 X型拉结筋 

分 类 号：TU375[建筑科学—结构工程]