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Single thin-wall continuous rigid frame bridge pier collision simulation method

A simulation method and technology for bridge piers, which are applied in design optimization/simulation, CAD numerical modeling, instruments, etc., can solve problems such as affecting the normal passage of road vehicles, hindering smooth traffic, and causing injuries to vehicles.

Pending Publication Date: 2022-04-29
GUANGZHOU METRO DESIGN & RES INST
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  • Abstract
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AI Technical Summary

Problems solved by technology

This kind of accident is difficult to deal with, it will cause vehicle damage and personal injury, affect the normal passage of road vehicles, hinder the smooth flow of traffic, and seriously endanger people's lives, so the study of vehicle-bridge collision has important practical significance

Method used

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  • Single thin-wall continuous rigid frame bridge pier collision simulation method
  • Single thin-wall continuous rigid frame bridge pier collision simulation method
  • Single thin-wall continuous rigid frame bridge pier collision simulation method

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Embodiment 1

[0039] This embodiment provides a single thin-walled continuous rigid frame pier collision simulation method, such as figure 1 shown, including steps:

[0040] S1. Establish the finite element model of the whole bridge.

[0041] In this embodiment, a 4×40m continuous girder bridge is selected as the research object, and a finite element model of the whole bridge is established, as shown in figure 2 shown. The model has a total of 33135 elements, including superstructure, piers and caps. The superstructure is a variable section box girder. The pier body is a rectangular solid section with a pier height of 14m. The cross-bridge width of the pier section varies with the pier height. The root is 3m, the top is 2.4m, the thickness of the side pier is 0.8m, and that of other piers is 1.4m.

[0042] In order to consider the influence of soil-junction interaction on the impact response, a 6-DOF spring is used at the bottom of the cap, and the spring stiffness is shown in Table 1....

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Abstract

The invention provides a single thin-wall continuous rigid frame bridge pier collision simulation method. The method comprises the following steps: establishing a finite element model of a whole bridge; selecting a vehicle model, and calibrating the vehicle model; performing vehicle collision simulation on the bridge; the dynamic response of the bridge in the vehicle collision process is obtained through dynamic time history analysis; and judging the damage state of the bridge pier according to the stress-strain distribution rule of the bridge pier body. According to the method, a vehicle and bridge fine finite element model considering material nonlinearity, geometric nonlinearity, geometric nonlinearity and a material rate effect is established, and numerical simulation is carried out on the process that the lower structure of the rigid frame bridge is subjected to heavy vehicle collision. The dynamic response of the bridge in the vehicle collision process is obtained through dynamic time history analysis, the damage state of the bridge pier is judged according to the distribution rule of the stress strain of the pier body, and a theoretical basis is provided for the anti-collision measure design of the single thin-wall continuous rigid frame bridge pier.

Description

technical field [0001] The invention belongs to the technical field of collision research of single-thin-wall continuous rigid-frame bridge piers, and in particular relates to a collision simulation method for single-thin-wall continuous rigid-frame bridge piers. Background technique [0002] The full-rigid frame bridge with single thin-walled pier has the advantages of excellent landscape and free support maintenance. Traffic accidents such as vehicles hitting bridge piers are very common, mostly due to vehicle mechanical accidents, driving too fast, unfamiliar road conditions, drunk driving, fatigue driving and other factors. Such accidents are difficult to deal with, and will cause vehicle damage and personal injury, affect the normal passage of road vehicles, hinder the smooth flow of traffic, and seriously endanger people's lives. Therefore, the study of vehicle-bridge collisions has important practical significance. Contents of the invention [0003] In order to ove...

Claims

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Application Information

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IPC IPC(8): G06F30/23G06F119/14G06F111/10
CPCG06F30/23G06F2119/14G06F2111/10
Inventor 郭敏农兴中史海欧徐梁晋王义博刘雨龙陈亮
Owner GUANGZHOU METRO DESIGN & RES INST
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