6
D01:10. 7672/sgjs2017040006
施工技术
CONSTRUCTION TECHNOLOGY
一种新型预制混凝土框架节点简介
及其受力性能探讨* 代领杰，胡翔，薛伟辰（同济大学建筑工程系，上海200092）
2017年2月下第46卷第4期
【摘要】提出了一种新型预制混凝土框架节点，该节点由预制柱、叠合梁及后瓷节点核心区组成。其中，上、下预制柱间通过预埋的新型螺栓系统进行连接，构造简单、施工速度快、质量可靠。在此基础上，开展了高轴压比（0.8）下新型预制混凝土框架中节点及其现浇对比试件的受力性能试验。结果表明：预制混凝土框架节点与现浇对比试件的破坏形态均为梁端受弯破坏，柱端仅出现少量弯曲裂缝，节点核心区未开裂；预制混凝土框架节点的承载力与现浇节点的承载力接近（分别为403kN和398kN），而位移廷性比现浇节点的位移延性低约7.7%（分别为2.88和 3.12)。
【关键词】预制装配式；混凝土框架节点；螺栓连接系统；试验；承载力：位移延性
【中图分类号】TU311.3
［文献标识码］A
【文章编号】1002-8498(2017)04-0006-03
IntroductionofaNewTypeofPrecastConcreteFrameConnection
and Discussion of Its Mechanical Performance
Dai Lingjie, Hu Xiang, Xue Weichen
(Department of Structural Engineering,Tongji Unieersity,Shanghai 200092, China)）
Abstract:A new type of precast concrete frame connection,which was composed of precast column, composite beam and CIP core, was proposed in this paper. The precast columns in the connection were connected by new type of bolted connection system, which is simple and easy for construction. Two full. scale connections with high axial compression ratio (O. 8), including a precast interior connection and a monolithic connection used as control specimen, were tested. The results showed that flexural damage occurred at beam ends for the two connections, and there were only several cracks at column end and no crack in the core zone of the connections. Bearing capacity of precast interior connection and monolithic connection was 403kN and 398kN, which are very close. While, displacement ductility of the precast connection was 2.88 and 3.12,about 7.7% lower than that of CIP specimen.
Key words: precast; concrete frame connection; bolts connection system; testing; bearing capacity; displacement ductility
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引言
与现浇混凝土框架相比，预制混凝土框架具有
现场湿作业少、构件质量好、节省模板和支撑、环境污染小等优点，综合效益显著"。
预制混凝土框架结构的整体性能很大程度上依赖于其节点性能的优劣。节点连接在满足受力性能要求的前提下，应尽量减少现场拼装时间。节
*上海市科委重大项目（14DZ1208302)；上海市国资委企业技术创新和能级提升项目（2015010）
【作者简介】代领杰，硕士研究生，E-mail;1432084@tongji.edu.cn【通讯作者］薛伟辰，博士，教授，E-mail;xuewe@tongji.edu.en
【收稿日期】2016-09-25 万方数据
点处构造较为复杂，施工过程中质量难以保证，往往使得节点成为结构中的薄弱环节[2]。地震中预制混凝土框架的破坏多发生在节点处。
目前，预制混凝土框架中柱纵筋常采用套筒灌浆连接、浆锚搭接连接及螺栓连接等方式连接。套筒灌浆连接、浆错搭接连接需在套简或预留插筋孔中灌注高强灌浆料，施工流程要求严格、质量难以控制且不易检测；相比而言，螺栓连接构造简单、施工便捷、质量可控，但其受力性能尚有待进一步研究。
从系统查阅的文献资料来看，目前国内外针对