箱型截面曲梁的预应力分析

THE ANALYSIS OF THE PRESTRESSING OF CURVED BOX GIRDER BRIDGE

本文以薄壁箱型截面曲梁的静力分析为基础,推导出两种箱型截面曲梁的预加应力方法。方法Ⅰ只抵消截面弯矩,方法Ⅱ不仅抵消截面弯矩,而且抵消扭炬和剪力。通过算例对两种方法进行分析和比较,结果表明两种方法均有一定的实用价值。

Based on the theory of curved thin walled girder,two methods of design of the prestressing of curved box girder bridge are developed in this paper. In the method one,the bending moments of the section have been cancelled while in the method two,the bending moments as well as the torsional moments and the shearing forces have all been cancelled.Form the examples,both methods of design have been compared and analysed. The results show that they are valuable in the engineering design.