高层混凝土框架核心筒-木盒混合结构抗震性能研究  

Research on seismic performance of a concrete-wood hybrid structural system for tall building

作　　者：熊海贝[1] 陈佳炜 吴颖[1] XIONG Haibei;CHEN Jiawei;WU Ying(College of Civil Engineering,Tongji University,Shanghai 200092,Chin)

机构地区：[1]同济大学土木工程学院

出　　处：《建筑结构学报》2018年第8期62-70,共9页Journal of Building Structures

基　　金：国家重点研发计划项目(2016YFE0105600);地震工程国际合作联合实验室合作研究项目(TMGFXK-2015-002-2);中央高校基本科研业务费专项(22120170521)

摘　　要：提出了一种以混凝土框架-核心筒结构为“主结构”,每层主结构间内嵌3层装配式轻型木结构为“子结构”的装配式高层建筑结构体系。该混合结构体系实现了建筑使用功能多样化,结构体系集成化,建筑材料绿色化,建造施工装配化的特点。着重研究了体系中主结构与子结构间的连接,根据连接的特点和强弱,提出了3种不同的结构模型：1）重力模型,其特点是主结构与子结构在侧向不连接或弱连接,不考虑子结构对整体结构抗侧刚度的贡献;2）刚度模型,主子结构间采用螺栓有效连接;3）隔震模型,其子结构底面与主结构采用隔震支座连接。采用有限元软件SAP2000对3种具有不同受力特点的模型结构进行抗震性能分析研究。结果表明：重力模型主结构受力安全合理;刚度模型中子结构对整体结构抗侧刚度的贡献可达6%~35%;隔震模型中隔震子结构可明显降低整体结构的地震反应。与建筑功能相同的混凝土框架核心筒结构相比,混凝土框架核心筒-木盒结构自重可减轻25%,地震作用可减小30%,有利于在地震设防区应用。A novel assembly-type concrete-wood hybrid structural system for tall buildings was proposed in this paper. The new structural system is composed of two parts： the concrete frame-tube structure as a main structure, and prefabricated light wood frame construction as substructures inserted into the main structure. Characteristics such as flexible building function, integrated structure system, green building materials and prefabricated construction work are realized by the proposed hybrid structure. With the focus given to the characteristics of different types of connections between the main structure and substructures, three structural analysis models were proposed ： 1 ） ＇ gravity model＇ , assuming no connections or weak connections between the main structure and substructures with the lateral stiffness of substructures being ignored ; 2 ） ＇ rigidity model＇ , in which effective bolt connections were adopted ; 3 ） ＇ isolation model＇ , in which the substructures were connected to the main structure through rubber bearings. Seismic performance analysis of the models was conducted utilizing the finite element software SAP2000. The results show that the main structure of the gravity model performs well. The rigidity model shows that the lateral stiffness contribution of the substructures to the whole building accounts for 6% to 35%. The isolation model indicates that the seismic responses of the whole structure significantly decrease because of the isolated substructures. Compared with traditional high-rise concrete structures with the same building function, the total weight of the hybrid structure can be reduced by 25 % , while the seismic force is decreased by 30%, which is beneficial to promote the application of such structures in seismic fortification areas.

关 键 词：高层建筑 绿色建筑 混凝土-木混合结构 结构连接 有限元分析 抗震性能 

分 类 号：TU973.14[建筑科学—结构工程] TU311.41