Numerical simulation and tests for flexible rock shed subjected to rackfall impact
YANG Jianrong1,2,BAI Yu2,YANG Xiaodong2,LUO Yunfei3
1.State Key Laboratory Breeding Base of Mountain Bridge and Tunnel Engineering,Chongqing Jiaotong University,Chongqing 400074,China;
2.Faculty of Civil Engineering and Architecture,Kunming University of Science and Technology,Kunming 650500,China;
3.Kunming Survey,Design and Research Institute Co.,Ltd.of CREEC,Kunming 650200,China
Abstract：A new flexible rock-shed was presented for protection of railway from falling rocks.The shed consisted of a metal flexible net system connected with specific spring spacer bars.It was designed as a buffer against rock impact and replace an array of reinforced concrete portable frames linked with a longitudinal steel tube truss.In order to evaluate the performance of the flexible rock-shed,the numerical simulation was performed to investigate impact responses of the shed to rockfall.Then,the impact tests were conducted on a full-scale model for the local part of the prototype structure.The data obtained included impact time interval,maximum deflection of metal flexible net,tensile force of support ropes and axial strain of spring spacer bars.The numerical simulation results were verified with tested data.It was shown that the structure can withstand impact energy of 50 kJ,the main components of the shed are working within their elastic
states.At last some complementary suggestions for improvement were offered.
杨建荣1,2，白羽2，杨晓东2，罗云飞3. 柔性棚洞结构落石冲击数值模拟与试验研究[J]. 振动与冲击, 2017, 36(9): 172-178.
YANG Jianrong1,2,BAI Yu2,YANG Xiaodong2,LUO Yunfei3. Numerical simulation and tests for flexible rock shed subjected to rackfall impact. JOURNAL OF VIBRATION AND SHOCK, 2017, 36(9): 172-178.
