装配式钢管混凝土叠合柱单边螺栓连接节点设计方法及其框架抗震性能  

A Design Method for One-Side Bolted Connection Joints of Prefabricated Concrete-Encased CFST Composite Column and the Analysis of Seismic Performance of CECFST Frames

作　　者：胡子明 郭磊[2] 王静峰[1,2] 廖飞宇 HU Ziming;GUO Lei;WANG Jingfeng;LIAO Feiyu(College of Civil Engineering,Hefei University of Technology,Hefei 230009,China;Engineering Research Center of Low-carbon Technology and Equipment for Cement-based Materials,Ministry of Education,Hefei University of Technology,Hefei 230009,China;Anhui Key Laboratory of Civil Engineering Structures and Materials,Hefei 230009,China;College of Transportation and Civil Engineering,Fujian Agriculture and Forestry University,Fuzhou 350002,China)

机构地区：[1]合肥工业大学土木与水利工程学院,合肥230009 [2]水泥基材料低碳技术与装备教育部工程研究中心,合肥230009 [3]土木工程结构与材料安徽省重点实验室,合肥230009 [4]福建农林大学交通与土木工程学院,福州350002

出　　处：《工业建筑》2024年第11期136-143,共8页Industrial Construction

摘　　要：钢管混凝土叠合柱具有优越的力学性能和耐久性,在工程中得到了广泛应用。然而目前钢管混凝土叠合柱-钢梁连接节点常采用焊接连接,节点区施工困难且焊接工作量大,焊接节点在地震下易发生脆性断裂。研究了钢管混凝土叠合柱与钢梁单边螺栓连接节点,基于节点内力在外混凝土的扩散机制,揭示了外混凝土对单边螺栓受拉和钢梁翼缘受压承载力和刚度的影响,建立了节点承载力和初始刚度设计方法。采用OpenSEES程序建立了钢管混凝土叠合柱连接框架的弹塑性分析模型;基于组件法和叠加原理,考虑了节点弯矩-转角和剪力-剪切关系模型,通过试验结果验证了分析模型的正确性,研究了钢管混凝土叠合柱单边螺栓连接框架在不同烈度地震下的动力响应,研究此类框架结构的抗震性能是否满足现行相关规范要求。Compared with traditional concrete filled steel tubular(CFST)column,Concrete-encased concrete-filled steel tubular(CECFST)composite columns possess better durability and fire performance,and have been widly used which also has broad application in engineering practice.However,welding joints are generally used to connect the steel beam to CECFST column,leading significant difficulty in joint construction accompanied by a large amount of welding work.Moreover,welding joints are more likely to appear fracture under earthquake loads.Therefore,it is necessary to develop a novel bolted assembled joints for CECFST column to steel beam connection.This paper proposed a blind bolted joints between CECFST and steel beam.The load transfer mechanism within the encased concrete was analyzed and its influence on the bearing capacity and stiffness of one-side bolts in tension and beam flanges in compression were discussed.The calculation model for the bearing capacity strength and stiffness of one-side joints was established.OpenSEES software was employed to model the assembled CECFST to steel beam frame,in which the moment-rotation and shear force-shear curves were obtained based on the component method and superstition method,respectively.The accurary of the model was verified through test results,and the dynamic response of the CECFST frame with one-side bolted connections under different seismic intensities was studied.The seismic performance for such frame structures was investigated to determine whether it meets the requirements of current relevant specifications.Through the comparison between the test results,the nonlinear model had good accuracy.Time history analysis was then performed on the assembled frame structure,in which different earthquake intensities were considered.The results indicated that the CECFST frame with assembled joint displayed excellent seismic behavior.The research results in this paper are beneficial for the application of such structure.

关 键 词：钢管混凝土叠合柱 装配式节点 节点设计方法 抗震性能 

分 类 号：TU398.9[建筑科学—结构工程] TU352.11