太原地区土动剪切模量和阻尼比几种值的合理性比较

通过对山西太原地区常用的几种土动剪切模量和阻尼比的对比,结合2个实际工程场地土层地震反应的计算结果,对《工程场地地震安全性评价工作规范》中给出的土动力参数、袁晓铭,等给出的推荐值以及兰青龙给出的太原地区的统计值的合理性进行了对比研究。结果表明,与规范值相比,统计值和推荐值与太原地区的实测值比较接近,且避免了土层地震反应中地表反应谱的“矮、胖”现象,较符合实际情况,可供无试验资料时参考。

Comparison of Reasonableness for Some Kinds of Values of Dynamic Soil Shear Modulus and Damping Ratio in Taiyuan Region

Based on comparison of some kinds of dynamic soil shear modulus and damping ratio in Taiyuan region,combined with calculated results of seismic response of soil layer of two real engineering sites,the reasonableness of soil dynamical parameters which given in "Code of Seismic Safety Assessment for Engineering Site",recommended value given by Yuan xiao-ming etc.and statistic value of Taiyuan region given by Lan qing-long are compared and studied.The results indicate that,compared with the value in the Code,statistic value and recommended value are quite close to real measurement value of Taiyuan region,the "low and fat" phenomenon of ground response spectrum in soil layer seismic response is avoided and results are closely accordant with real measured values.The statistic value and recommended value can be used if experiment data are not available.