大跨度连续刚构全桥模型试验研究——使用荷载作用下的性能  

Model Test and Study of Overall Bridge of Long-Span Continuous Rigid-Frame Structure -Performance Under Analogical Service Load

作　　者：许惟国[1] 何广汉[1] 

机构地区：[1]西南交通大学土木工程学院,四川成都610031

出　　处：《桥梁建设》2005年第3期1-4,共4页Bridge Construction

摘　　要：结合虎跳门大跨度连续刚构主桥的方案设计进行了整桥计算分析和1∶16.7的缩尺模型试验研究,通过对试验模型在静力加载至使用荷载时的静力强度、刚度变化及裂缝观测等考察,验证了与实桥对应的核心区段的受力性能。结果表明整体模型使用性能良好,经类比的实桥截面的设计若按部分预应力混凝土A类构件设计,其抗裂性能和使用性能是可靠的。With reference to the conceptual design of the main bridge of Hutiaomen Bridge, a long-span continuous rigid-frame structure, this paper conducts the calculation, analysis and 1∶16.7 scaled-down model test and study of the overall bridge of the continuous rigid-frame structure. On the basis of observation of the static strength, rigidity changes and cracking behavior of the model structure at the time the static load on the structure is gradually increased to the service load in the test, the paper also verifies the mechanical properties of the model kernel segments corresponding to those of the actual bridge. The results of test and study suggest that the serviceability performance of the overall model is satisfactory, and the anti-cracking behavior and serviceability of actual bridge section similar to the model section are reliable if the section can be designed as per type A element of partially prestressed concrete.

关 键 词：连续刚构桥 部分预应力混凝土 模型试验 

分 类 号：U448.23[建筑科学—桥梁与隧道工程] TU317.1[交通运输工程—道路与铁道工程]