车辆撞击下钢筋混凝土桥墩的动力响应及损伤特征

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Abstract

Based on the LS-DYNA software, nonlinear finite element simulations of truck collisions with typical reinforced concrete piers were conducted in this study. The dynamic responses and damage characteristics of the piers with different boundary conditions and stirrup ratios were focused, especially the typical damage patterns of reinforced concrete bridge piers under the actions of truck collisions. The analysis results revealed that: 1) piers mainly fail in shear, and when the fixed constraint position at the bottom of the piers lowers by 1 m from the ground, the main damage area of piers expand from 1.2 m to 2.5 m above the ground; 2) when the diameter of pier stirrups increases from 8 mm to 24 mm, the maximum horizontal displacement of the piers reduces by an average of 71.3%; 3) due to the gravity loads of the upper structures, the stress of the tensile longitudinal rebar of the piers at the range of the nominal impact height reduces significantly.

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Vehicle Collision Pier Finite Element Analysis Damage

Received: 12 October 2017 Published: 28 June 2019

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