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.
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.
ZHANG Qiang, CHEN Zhenhua, WANG Wenlong, SU Huaiwei, CHI Dejian. Numerical Simulation Study on Damage Characteristics of Reinforced Concrete T-Beam Bridge Under Blast Point Control. Air & Space Defense, 2025, 8(5): 83-90.
