Energy dissipation analysis and optimum design on a flexible rock-shed for rockfall protection
Wang Min1 Shi Shao-qing Liu Ying-feng1,2 Cui Lian-ming1
1. Dept. of Civil Eng., Logistical Engineering University, Chongqing 401311, China;
2. Chongqing International Construction Corporation, Chongqing 401120, China
The flexible rock-shed for rockfall protection is composed of a steel vaulted structure and ring nets. The existing researches show that the stiffnesses of the rock-shed internal components are mismatched and the most serious plastic distortion occurs on the steel vaulted structure because of some weak components in the flexible rock-shed obstructing the load transfer path under the impact of rockfall. These defects would increase the maintenance cost and limit the engineering application. In order to optimize the flexible rock-shed and decrease the plastic distortion of the steel vaulted structure, a numerical model was employed to investigate the energy absorbed by each component in the flexible rock-shed based on results of the full-scale model experiments and numerical simulations, and a design method was presented to improve the connections between the components of the flexible rock-shed. The numerical simulation results show that: compared to the original flexible rock-shed, the energy absorbed by the steel vaulted structure of the improved flexible rock-shed is significantly decreased and the distortion is improved. In addition, a parametric study for the improved flexible rock-shed was implemented and an optimum design was presented.
汪敏1 石少卿1 刘盈丰1,2 崔廉明1. 防落石柔性棚洞的耗能性能分析及优化设计[J]. 振动与冲击, 2018, 37(1): 216-222.
Wang Min1 Shi Shao-qing Liu Ying-feng1,2 Cui Lian-ming1. Energy dissipation analysis and optimum design on a flexible rock-shed for rockfall protection. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(1): 216-222.
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