上海世博园区预制预应力综合管廊力学性能试验研究  

Experimental Studies on Mechanical Properties of PPMT in Shanghai Expo Area

作　　者：薛伟辰[1] 胡翔[1] 王恒栋[2] 

机构地区：[1]同济大学土木工程学院,上海200092 [2]上海市政工程设计研究总院,200092

出　　处：《特种结构》2009年第1期105-108,116,共5页Special Structures

基　　金：国家"十一五"科技支撑计划项目(2006BAJ16B07)

摘　　要：以2010年上海世博会园区预制预应力综合管廊为原型,通过足尺模型试验,对预制预应力综合管廊的破坏形态、破坏机制、接头平截面假定、结构内力分布、极限承载力、变形能力与延性等进行了较为系统的研究。结果表明:在四侧壁等值对称荷载作用下,试件经历了开裂、屈服和极限破坏三个阶段;破坏形态为侧壁端部截面屈服,结构形成塑性机构,达到承载能力极限状态,破坏机制为弹簧铰闭合框架机制;在受力全过程中,试件接头满足平截面假定;试件的极限承载力达到内力设计值的3.3倍;试件整浇侧壁和含拼缝侧壁的位移延性系数分别达到5.30和4.23。本文的研究成果将为预制预应力综合管廊在我国的推广应用提供技术依据与参考。According to the construction of precast prestressed municipal tunnel （PPMT） in 2010 Shanghai Expo Area, static test was conducted on a full-scale PPMT model, the mechanical properties of the PPMT were evaluated in terms of failure pattern ,failure mechanism, plane section assumption of joint, internal force distribution, loading capacity, deformability and ductility. Results showed that the specimen in the test underwent elastic, yielding and ultimate stage. The failure pattern of the specimen was characterized by yielding of end sections of the continual sides. The plastic mechanism was formed and the specimen reached ultimate loading capacity state. The specimen failed in close frame model mechanism with elastic hinge appeared in joint. Plane section assumption of the joint was validated during the whole loading procedure. The ultimate load capacity was about 3.3 times the design load, while displacement ductility coefficients of the continual and precast sides reached about 5.30 and 4.23, respectively. The results that from this paper could offer technique base to promote the application for the precast prestressed municipal tunnel in our country.

关 键 词：预制预应力综合管廊 力学性能试验 弹簧铰闭合框架机制 位移延性 

分 类 号：TU990.3[建筑科学—市政工程]