独柱墩连续箱梁桥抗倾覆性能设计方法研究

Study on Design Method for Anti-overturning Performance of Single Column Pier Continuous Box Beam Bridge

为了对非固结独柱墩桥梁横向抗倾覆性能进行简单可靠的设计计算,首先分析了目前常用的计算方法的缺点和不足,提出了以控制桥梁支座受力性能为指标的计算方法。同时,为了保证桥梁在超载车辆作用下有足够的安全度,结合桥梁实际运营情况,采用设计荷载及重车密布荷载两种活载工况进行验算,并规定在每种荷载工况下采用不同的支座性能控制指标。最后采用Midas/Civil软件对一座实桥进行计算分析,说明本方法计算的简单性和可靠性。

In order to carry out the simple and reliable design calculation of transverse anti-overturning performance of non-consolidated single column pier bridge, the article firstly analyzes the disadvantages and shortages of the present common calculation method, and puts forward the calculation method by controlling the stress performance as an index. Also in order to guarantee the sufficient security of bridge under the action of overload vehicles, and according to the practical operation of bridge, two live load conditions of design load and heavy truck load are used to check and calculate, and the different support performance control indexes are used by stipulating every load condition. The software Midas/Civil is used to calculate and analyze a real bridge. The result shows that the calculation of this method is simple and reliable.