摘要
通过构建滚石棚洞冲击系统非线性集中质量模型,结合Meyer非线性接触定律,运用能量原理研究了滚石冲击下棚洞结构(普通棚洞和耗能棚洞)的动力响应,在此基础上研究棚洞板在滚石冲击荷载下的抗冲切计算.通过实例计算表明,耗能减震棚洞能很好地吸收滚石冲击能量,大幅度降低滚石冲击力,有效提高混凝土板抗冲切能力,是一种理想的滚石防护措施.
A mass spring system was given to model the impact system between rock-fall and shed tunnel. Considering the Meyer nonlinear contact law, we used the energy principle to study the shed tunnel＇s dynamic response during rock-fall＇s impact, and then the punching resistance ability was calculated. The numerical example indicated that the energy dissipative shed tunnel could absorb the impact energy effectively, also greatly reduced the impact force and improved the punching resistance ability of concrete, which all showed that this is an ideal protection structure to avoid rock-fall.
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第5期621-626,共6页
Journal of Lanzhou University(Natural Sciences)
基金
科技部支撑项目(2011BAK12B03)
国家自然科学基金重点基金项目(40830742)
关键词
滚石
棚洞
能量
接触模型
冲切
rock-fall
shed tunnel
energy
contact model
punching
