Deep-water pier seismic response evaluation method taking water-pier coupling effect into consideration

Abstract

Disclosed is a deep-water pier seismic response evaluation method taking water-pier coupling effect into consideration. In the deep-water pier kinetic equation: P=-(M(1)ug(t)+M(2)us(t)), which takes water-pier coupling effect into consideration the M, the K and the C refer to quality matrix, rigidity matrix and damping matrix in the structure respectively, the ug(t) is the seismic oscillation acceleration time interval, the us (t) is the relative-movement displacement time interval of a pier, the u's (t) is the relative-movement speed time interval of the pier, the us(t) is the relative-movement acceleration time interval of the pier, the (M(1)) and the (M(2)) are the rigid-body associated mass matrix and the flexible associated mass matrix under water, and the P is the seismic oscillation water pressure load stressed on the pier. The deep-water pier seismic response evaluation method can be used for anti-seismic design and bearing force evaluation of a deep-water bridge structure under the action of earthquakes. Seismic response analysis of the pier of the deep-water bridge in finite element software can be conveniently performed, the factors, such as nonlinearity, interaction of soil-structural power and the like in materials can be considered during analysis, and the deep-water pier seismic response evaluation method is high in computing efficiency as compared with fluid-solid coupled numerical software and further provides the theoretical basis for the anti-seismic design of the deep-water bridge.

Description

technical field [0001] The invention relates to a seismic response evaluation method of water-pier coupling effect. In particular, it relates to a method for evaluating the seismic response of deep-water bridge piers considering water-pier coupling effects, which can be conveniently implemented in finite element software for seismic response analysis of deep-water bridge piers. Background technique [0002] Many of the long bridges are sea-crossing, cross-river bridges and deep-water high-pier bridges in the western reservoir area, such as the Hangzhou Bay Bridge, the Xiamen-Zhangzhou Sea-Crossing Bridge at the mouth of the Jiulong River in Zhangzhou, and the Miaozi Bridge passing through the Zipingpu Reservoir. The Pingmin River Bridge, the above-mentioned cross-sea and reservoir bridge, because its piers are located in deep water, the dynamic interaction between water and piers under the earthquake will generate hydrodynamic pressure on the deep water pier, thus affecting ...

AI Technical Summary

Problems solved by technology

However, the above research has the following problems: In the analysis of the seismic response of deep-water bridge piers, the seismic hydrodynamic pressure caused by the elastic vibration of bridge piers cannot be considered in the existing finite element software. The simple program cannot carry out the detaile

Images