高速铁路防零星落块刚性防护系统试验与数值分析  

Test Research and Numerical Analysis of Rigid Protection System Against Sporadic Rock Falling on High-speed Railway

作　　者：齐欣[1] 韦韬[1] 余志祥[1] 

机构地区：[1]西南交通大学土木工程学院,成都610031

出　　处：《铁道标准设计》2013年第10期31-35,共5页Railway Standard Design

基　　金：铁道部科技研究开发计划重点项目资助(2012G003-J);铁道部科技研究开发计划(2010G014-E)

摘　　要：结合长昆高速铁路沿线防零星落块的刚性防护系统的实际工程,针对刚性防护系统的防护能量不明确的现状,开展了原尺寸刚性防护系统落石冲击试验,研究新型刚性防护系统的变形特征和传力机理,明确该系统两阶段的传力工作状态,指出系统中的薄弱环节。基于LS-DYNA的显式动力算法,模拟落石冲击刚性防护系统的全过程,并与试验结果进行对比,二者结果吻合较好。结果表明:新型刚性防护系统结构形式布置合理,具有良好的变形能力和传力途径,能达到预计的抗冲击效果,在此基础上,提出该系统相应的设计优化建议。In combination with the actual project of rigid protection system against the sporadic rock- falling on Changsha-Kunming high-speed railway, and in view of the actual situation that it was not clear how much protective energy the rigid protection system could provide, the impact test on the rigid protection system against the full-sized falling rocks was carried out. Then according to the test results, the deformation behavior and the load transfer mechanism were studied; therefore the working conditions of the two stages of this system were made clear, and the weak links in this system were pointed out. In addition, based on explicit dynamic algorithm LS-DYNA, the overall process was simulated in which the rigid protection system was knocked by the falling rocks severely. Further, by comparing the simulation results with the test results, it can be seen that the two results accord with each other well. And all the results show that the structure of this new rigid protection system is reasonable, with good deformability and good load transfer mechanism, and can achieve the expected anti-impact effect. Finally, on the basis of above-mentioned achievements, the relevant suggestions on the design optimization for this system were put forward.

关 键 词：高速铁路 刚性防护系统 传力机理 仿真分析 试验 

分 类 号：U238[交通运输工程—道路与铁道工程] U213.155