【摘要】 为了研究输入界面对地表加速度峰值(Amax)的影响,在研究我国数百个工程场地钻孔资料的基础上,选取和构造了若干有代表性的场地剖面,利用目前工程上广泛应用的场地地震反应分析的一维等效线性化波动方法,计算了4类场地在6种不同强度的地震动输入下的Amax。分析了每类场地的输入界面的改变对Amax的影响,研究结果表明:一般强度(10 Gal、50 Gal和120 Gal)的地震动输入时,Amax随输入界面的改变而变化较小;大强度(250 Gal、300 Gal和400 Gal)地震动输入时,Ⅱ、Ⅲ类场地的Amax随输入界面的改变而变化较大,Ⅰ、Ⅳ类场地的Amax随输入界面的改变而变化较小。更多还原

【Abstract】 In order to study the effect of the inputting interface of earthquake ground motion on the ground peak acceleration(Amax),based on hundreds of actual engineering site profiles,several significant site profiles are selected and built.Amax of four types of sites are calculated and analyzed in detail under six earthquake inputs with different intensities by using the equivalent linearization and wave propagation method for the earthquake response analysis of soil layers.The effect of different inputting interfaces of earthquake ground motion on Amax is analyzed.The result show that when the earthquake inputs are general(the peak is 10 Gal,50 Gal or 120 Gal),Amax changes little with the change of the inputting interface of earthquake ground motion;when the earthquake inputs are great(the peak is 250 Gal,300 Gal or 400 Gal),Amax for the sites of the second type and the third type change significantly with the change of the inputting interface of earthquake ground motion,while the ground peak accelerations for the sites of the first type and the fourth type change little.更多还原