复合支护结构核爆冲击波等效静载的不确定性分析

根据中值点处展开的一次二阶矩法讨论了土中压缩波的升压时间及其不确定性，然后研究了按单自由度体系进行复合支护地下结构抗核爆设计时的动力系数（荷载系数）和等效静载的变异系数．数值结果表明，土中压缩波升压时间的不确定性，不仅与结构埋深和土参数的变异性有关，而且与土参数的均值有关，等效静载的不确定性，依赖于作用于结构上的动载变异性和结构自振频率变异性，而动载不确定性对等效静载变异性影响最大

Uncertainty Analysis of Equistatic Load on Composite Lining Structures Under Nuclear Blast Waves

The pressure-arising-duration and its uncertainty of the compressive waves in subsoil are discussed based on the first order second moment at mean point. The dynamic factor (load factor) and the variance of the equi static load are studied for the antiblast design of composite lining structure by means of the SDOF simplification. The results show that the uncertainty of pressure-arising-duration has relations to the embedded depth of structures and the means and variance coefficients of soil parameters. The Uncertainty of the equi static load depends on the variance of the natural frequency of the structure and that of the dynamic load on it, whereas the dynamic load is the most important factor.