欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
落石冲击力计算依赖于一些半经验半理论的算法，但这些算法的适宜性、合理性一直未能得到充分讨论和厘清。本文选择国内外代表性的5种冲击力算法，在设定落石尺寸、自由落高和缓冲土层厚度下进行冲击力计算结果的系统对比分析，发现国内有关规范推荐的落石冲击力算法实际计算的是落石冲击过程平均冲击力，而并非最大冲击力，从而导致工程应用中冲击力计算结果严重偏小，应是落石冲击力作用下结构开裂和失效的原因。相应地，以日本道路公团算法为代表的基于落石现场冲击实测冲击力拟合得到的经验算法比较符合实际，建议引入使用，但其不足在于不能反映冲击角度、缓冲土层厚度等对冲击力的影响，要圆满解决落石冲击力计算问题需要在以上各方面进一步努力。
英文摘要：
Calculation of rockfall impact force depends on some semi-theoretical and semi-empirical methods, whose suitability and rationality have not been fully discussed and clarified. Choosing five representative rockfal impact force calculation methods, by systematic comparative research on impact force calculation results at different impacting speed, buffer layer thickness and rockfall size, the authors found that the impacrt force calculation method recommended by codes is unreliable. Because they reflect the average impact force but not the maximum impact force in the rockfall impacting process. So the obtained impact force in actual project by these methods is smaller than its true value. So it should be the reasons which caused structure cracking and failure under rockfall impacting. Correspondingly, the empirical impact force calculation method based on field test data such as the method recommended by the Japanese Road Association is more accurate. But it can not reflect the influence of buffer layer thickness and impacting angle to rockfall impact force. So, a satisfactory solution for the rockfall impact force calculation method needs further efforts on above aspects.
同期刊论文项目
同项目期刊论文
期刊信息
位置：