大水位差架空直立式码头平面框架结构水平承载力分析

On Horizontal Ultimate Load of Overhead Port with Great Height of Inland River

针对内河高水位差架空直立式码头的结构形式,对多种荷载下的结构静力非线性响应做了数值分析,通过与室内模型试验测试数据对比,验证了分析方法的可靠性。随后对该类结构进行了大量的数值计算,得到了码头结构和桩基在不同荷载下的力学响应。分析结果表明:利用静力非线性分析方法,能够较好地分析结构受力响应的过程,同时还能发现其中的薄弱环节;在结构分析中计算各类截面塑性铰的性能,很容易判断构件是否屈服或破坏;对于该类结构,在结构优化设计时,宜分成桩1和其它桩两类,通过优化两类桩之间的联系方式使结构受力更合理。

A numerical analysis to the structural static nonlinear response under various loads is made against the structural style of great water fluctuation open-type wharf in inland rivers. The reliability of the analytical method is verified through a comparison to the test data of indoor model test. The mechanical responses of the wharf structure and piles under different loads are obtained through a large number of numerical calculations. It is concluded that the process of the structural mechanical responses is well simulated and the weak links of the structural design are found out by static nonlinear method; the damage extent of members are judged easily by calculating the nature of different cross-sectioned plastic-hinges. Meanwhile, when the structural optimum design is made, the piles should be divided into pile 1 and other piles. The way of linking the two kinds of piles is optimized to ensure a reasonable structure stress.