可拆卸RCS框架结构抗震性能研究  

Seismic performance of demountable RCS frame structure

作　　者：蔡建国 李桅[2] CAI Jianguo;LI Wei(Jiangxi Guojing Construction Investment Co.,Ltd.,Zhangshu 331200,China;College of Civil Engineering and Architecture,Wenzhou University,Wenzhou 325035,China)

机构地区：[1]江西国经建设投资有限公司,江西樟树331200 [2]温州大学建筑工程学院,浙江温州325035

出　　处：《地震工程与工程振动》2025年第1期205-216,共12页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51308419);浙江省自然科学基金公益项目(LGF22E080004)。

摘　　要：可拆卸钢筋混凝土柱-钢梁(reinforced concrete column-steel beam,RCS)组合框架由钢筋混凝土柱、钢梁和可拆卸连接件组成,梁柱节点采用螺栓抗剪连接件连接,既可实现构件拆卸回收利用又能保证力的有效传递。然而,目前可拆卸RCS框架结构抗震性能尚不明确,亟需开展可拆卸RCS框架结构抗震性能研究。为此,已有研究的非可拆卸常规RCS框架结构拟静力试验,采用有限元软件ABAQUS建立有限元模型,通过破坏模式、滞回曲线、骨架曲线及累计耗能等方面对比了有限元计算结果与试验结果,可以有效验证数值模拟的准确性。借助相同有限元分析方法,建立了采用新型可拆卸连接方式的RCS框架有限元模型,深入研究了在不同节点连接方式下的RCS框架试件的抗震性能,包括受力传递路径、应力云图、滞回曲线、骨架曲线、刚度退化、延性与耗能等性能,并分析了框架结构实现可拆卸的可行性。结果表明:新型可拆卸节点连接方式可以将塑性铰控制在远端梁截面区域,有效保护节点核心区,提高了极限承载力、刚度;滞回曲线更加饱满,减缓强度和刚度退化速率,大幅提升框架耗能能力。采用新型可拆卸节点连接方式的试件可以有效保证传力路径的连续性,且其各项抗震性能指标明显优于传统RCS框架结构。研究成果及结论为可拆卸RCS框架结构的抗震设计提供有力的设计参考和数据支撑。The demountable reinforced concrete column-steel beam(RCS)combined frame consists of reinforced concrete columns,steel beams and demountable connectors.The beam-column joints are connected by bolted shear-resistant connectors,which can realize the disassembly of components for recycling and ensure the effective transfer of forces.However,the seismic performance of demountable RCS frame structure is still unclear,and there is an urgent need to conduct out research on the seismic performance of demountable RCS frame structure.To this end,for the proposed static test of non-demountable conventional RCS frame structure carried out by the team in the early stage,this paper adopts the finite element software ABAQUS to establish a finite element model,and compares the finite element calculation results with the test results through the damage modes,hysteresis curves,skeleton curves,and the cumulative energy dissipation,etc.,to effectively verify the accuracy of the numerical simulation.With the help of the same finite element analysis method,a finite element model of the RCS frame with the new demountable connection was established,and the seismic performance of the RCS frame specimens under different node connections was studied in depth,including the force transfer paths,stress maps,hysteresis curves,skeleton curves,stiffness degradation,ductility,and energy dissipation,etc.,and the feasibility of realizing the demountability of the frame structure is also analyzed.The results show that:the new demountable joints connection can control the plastic hinge in the region of the distal beam section,effectively protect the joints core area,and improve the ultimate load carrying capacity and stiffness.The hysteresis curve is fuller,slowing down the degradation rate of the load carrying capacity and stiffness,and greatly improving the frame s energy consumption capacity.The specimens with the new demountable joints connection can effectively ensure the continuity of the force transmission path,and its seismic performance inde

关 键 词：可拆卸节点 RCS框架结构 破坏模式 抗震性能 数值分析 

分 类 号：TU398.2[建筑科学—结构工程] P315.9[天文地球—地震学]