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随着跨线桥梁及机动车辆的增加,因车撞而桥毁的事故越来越多。然而,相比桥梁抗震等方面的研究,桥梁车撞研究则开展较少,甚至至今仍然没有全面的规范可依。为此,该文采用非线性接触-碰撞有限元技术,较为真实地模拟车辆碰撞桥墩的过程,研究车撞下桥墩非线性损伤及加固措施。研究结果表明:外包钢管能够有效地提高墩柱的抗撞性能,显著降低车撞下墩柱的损伤。
With the increase of cross-over bridges and motor vehicles, more and more accidents have been bridged and destroyed due to vehicle collisions. However, compared with the studies on earthquake resistance of bridges, the research on bridge car crash is relatively rare, and even today there is still no comprehensive normative. Therefore, the nonlinear contact-collision finite element method is used in this paper to simulate the process of the vehicle crashing the piers and to study the nonlinear damage and reinforcement measures of the pier. The results show that the steel tube can effectively improve the crashworthiness of the pier and significantly reduce the damage of the pier.