双柱花瓶墩预应力盖梁计算分析

Calculation and Analysis on Prestressed Bent Cap of Double-column Vase-shaped Pier

摘要:

为尽可能减少对桥梁下部道路通行的影响和满足城市景观的需求,双柱花瓶墩预应力盖梁常作为城市高架桥的优选方案。传统的杆系结构受力分析无法准确模拟墩顶处预应力盖梁的受力特征,本文以某城市高架桥项目为依托,采用通用有限元软件针对墩柱及盖梁进行实体单元建模,计算结果验证了设计方案的合理可靠,为类似的工程设计提供了参考。

Abstract:

In order to reduce the influence on the road traffic under bridge possibly and meet the demand of urban landscape, the prestressed bent cap of double-column vase-shaped pier is frequently use as a preferred scheme of urban viaduct. The conventional force analysis of skeletal structures cannot accurately simulate the stress characteristics of prestressed bent cap at the pier top. Based on an urban viaduct project, the universal finite element software is used to carry out the solid element modeling for the pier column and bent cap. The calculated results of the stress, crack resistance and other indexes all verify that the design scheme is rational and reliable.