箱型截面曲线连续梁桥的预应力分析

本文以薄壁结构弯曲和扭转分析为基础,推导出两种曲线连续梁桥的预应力设计方法。方法Ⅰ只抵消截面弯矩;方法Ⅱ不仅抵消截面弯矩,而且抵消截面扭矩和剪力。通过工程实例对两种方法进行比较和分析。

Analysis for Prestressing of Curved Continuous Box Girder Bridges

Based on the theory of thin-walled girder, two design methods for the prestress-ing of curved continuous box girder bridge are developed. In the first method, the bending moments of the section have been cancelled, while in the second one, the bending moments as well as the torsional moments and the shearing forces have all been eliminated. As a practical application, both methods have been compared and analysed .