1年持续荷载下预应力组合梁的受力性能  

Performance of Prestressed Steel-Concrete Composite Beam under One-Year Sustained Loading

作　　者：薛伟辰[1] 

机构地区：[1]同济大学建筑工程系,上海200092

出　　处：《桥梁建设》2003年第2期1-3,15,共4页Bridge Construction

基　　金：上海市科技发展基金资助项目(992012044)

摘　　要：基于1年长期荷载试验,对预应力组合梁的长期变形、预应力筋应变、钢梁应变、抗剪连接件的滑移等时随性能进行较为系统的研究。在此基础上,指出我国《钢结构设计规范》中有关预应力组合梁长期挠度的计算方法偏于不安全,并提出了相应的设计建议。Based on the oneyear sustained loading test, the timedependent performance like the longterm deformation, strain of prestressing bars, strain of steel beams, and slip of shear connectors of prestressed steelconcrete composite beam is systematically studied. In accordance with the results of the study, it is found that the design methods for the longterm deflection of the prestressed steelconcrete composite beams provided in the 'Steel Structures Design Specification' of China are a little unsafe, and thus the corresponding design suggestions are put forward.

关 键 词：预应力组合梁 长期荷载 受力性能 设计 长期变形 应变 挠度 计算方法 桥梁工程 

分 类 号：U448.216[建筑科学—桥梁与隧道工程] U441[交通运输工程—道路与铁道工程]