|Table of Contents|

Mechanical properties and damage analysis of steel arch tower cable-stayed bridge under vehicle impact(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2025年06期
Page:
111-123
Research Field:
桥隧工程
Publishing date:

Info

Title:
Mechanical properties and damage analysis of steel arch tower cable-stayed bridge under vehicle impact
Author(s):
NIAN Youyou1; 2;  HUANG Hua1;  DING Hang3;  NIE Mengzhao3
(1. School of Civil & Architecture Engineering, Xi'an Technological University, Xi'an 710021, Shaanxi, China; 2. Office of Infrastructure, Xidian University, Xi'an 710071, Shaanxi, China; 3. School of Civil Engineering, Chang'an University, Xi'an 710061, Shaanxi, China)
Keywords:
bridge engineering;  V-shaped double steel arch tower cable-stayed bridge;  vehicle impact;  mechanical property;  finite element simulation
PACS:
U443
DOI:
10.19815/j.jace.2024.08044
Abstract:
In order to analyze the force performance of the double steel arch tower cable-stayed bridge structure under vehicle impact, a full-size refinement model of the actual vehicle was established by combining tests and ANSYS/LS-DYNA. Multi-scale refinement was carried out for the impact site to study the local damage characteristics and the collision force time course curve for different tonnages of vehicles at different impact locations. MIDAS Civil was used to model the bridge structure as a whole, analyze the dynamic response of the entire structure under vehicle impact, and define the volumetric damage rate indicator to reflect the damage degree of the steel arch tower. The results show that the intensity of the impact force is closely related to the rigidity distribution of the vehicle structure. The actual impact force of the vehicle on the bridge is much higher than the predicted value of the standard formula. The shell of the steel arch tower and the internal filler concrete deform collaboratively, which improves the stiffness of the steel arch tower and effectively reduces the depth of intrusion during the impact. The steel arch tower performs excellently in resisting vehicle impacts. The volumetric damage rate of the steel arch tower increases with the mass and speed of the vehicle, but the growth rate gradually slows down. Weak parts such as the tower-beam combination are significantly stressed under vehicle impact, and the area near the impact point is particularly affected. The diagonal cable close to the impact point is affected the most. The steel arch tower has obvious transverse displacement under vehicle impact, especially in the waist area, which has the largest deformation.

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Last Update: 2025-11-25