空天防御2025，Vol.8Issue(5)：83-90,8.
炸点控制对钢筋混凝土T梁桥的毁伤特性数值模拟研究
Numerical Simulation Study on Damage Characteristics of Reinforced Concrete T-Beam Bridge Under Blast Point Control
张强 1陈振华 2王文龙 1苏怀维 1迟德建1
作者信息
- 1. 上海机电工程研究所,上海 201109
- 2. 重庆红宇精密工业集团有限公司,重庆 402760
- 折叠
摘要
Abstract
To study the dynamic response and damage mode of reinforced concrete T-beam bridges under the control of penetrating ammunition explosion points,a three-dimensional separated reinforced concrete finite element model was established using the AUTODYN fluid structure coupling algorithm to simulate the damage characteristics of steel-concrete T-beam bridges numerically.On this basis,the damage characteristics of reinforced concrete T-beam bridges under the action of explosive charges at different explosion points were analyzed,and the dynamic response process of T-beam structures from concrete cracking,bottom layer cracking damage,steel yield,to local deflection of rib plates was reasonably presented.The research results show that,with a change in the blasting point,the T-beam rib plate exhibits a relatively severe deformation.The center deflection of the rib plate gradually increases with the downward offset of the blasting point,especially in the range of 1/4 to 1/2 below the main beam,where the damage is most severe.However,when the blasting point continues to move downward,the deflection of the T-beam rib plate gradually decreases.There is a maximum value of deflection associated with the movement of the blasting point,indicating an optimal blasting point.The research results can provide a reasonable basis for determining the penetration time of the explosive warhead and serve as a reference for improving the degree of bridge damage.关键词
T梁桥/炸点控制/动力响应/数值模拟Key words
T-beam bridge/blast point controlling/dynamic response/numerical simulation分类
交通工程引用本文复制引用
张强,陈振华,王文龙,苏怀维,迟德建..炸点控制对钢筋混凝土T梁桥的毁伤特性数值模拟研究[J].空天防御,2025,8(5):83-90,8.
