摘要
目前在水工建筑物设计中，水利行业采用单项安全系数法，水电行业采用多项安全系数法。两种方法表达形式相差很大，但实际功能相近；由于安全系数取值主要依靠长期积累的实际工程经验，两种方法计算结果也很接近。单项安全系数法便于对不同方案、不同工程进行分析对比，实际应用中更为方便。在土石坝和水闸抗滑稳定分析中，考虑地震荷载后，安全系数只有1．10～1．05（Ⅰ、Ⅱ、Ⅲ级建筑物），把这样一个安全系数分解成5个不同的系数是困难的，实际意义也不大。水利行业各项设计规范都采用单项安全系数法，唯独抗震设计采用多项安全系数法，带来一定不便。从目前实际情况出发，建议水利行业和水电行业的抗震设计分别采用单项安全系数法和多项安全系数法。
The value of factor of safety depends on the experiences of design and operation of the past and existing hydraulic structures. The formula for the single safety factor and the multi safety factor is quite different, but the results of computation is nearly the same. The single safety factor is more convenient for comparison between different design schemes and between different projects, so it is more convenient for use. The coefficient of safety against sliding under earthquake loading for earth dam and sluice is K = 1. 10 - 1.05, it is difficult to resolve it into five different coefficients used in the method of multi-safety-taetors.
出处
《水利水电技术》
CSCD
北大核心
2010年第9期31-35,共5页
Water Resources and Hydropower Engineering
基金
国家科技支撑计划项目(2008BAB29B05)
水利部公益性行业科研专项(200801007)
关键词
水工建筑物
抗震设计
单项安全系数
多项安全系数
hydraulic structure
earthquake load
single safety tactor
multi-safety-tactors
