Soil-Structure Interaction at Tarzana Accelerograph Station During 1987 Whittier Earthquake

1987年10月1日惠蒂尔海峡地震产生了强烈的 许多加速度计站记录到的地面运动 整个南加州。 其中一个站位于塔扎纳， 位于震中以西约44公里处， 记录了异常高的高峰加速度 峰值加速度， 是高频运动， 比附近观测站记录到的峰值加速度还要高 塔尔扎纳 地震后不久，加速度计被校准，没有 仪器故障的迹象在强烈的运动中很明显 加速度图 这个研究项目将调查这个令人不安的高 加速度记录，假设这是由于 土-结构相互作用之间的加速度站和 它所嵌入的土壤。 这种效应被发现存在于一个 早期的研究由首席研究员在一个加速器 车站有许多设计特点， 塔扎纳站。 本研究的目的是（1）确定任何土壤的程度- 结构相互作用，可能有助于大记录 （2）建立可靠的分析模型来预测 土-结构相互作用的影响，以及（3）消除 土-结构相互作用的影响，以获得 自由场运动

The October 1, 1987 Whittier Narrows earthquake generated strong ground motions that were recorded by numerous accelerograph stations throughout southern California. One station, located in Tarzana, approximately 44 kilometers west of the earthquake's epicenter, recorded unusually high peak accelerations. The peak accelerations, which are high frequency motions, are between 4 and 10 times greater than the peak accelerations recorded at nearby stations. The Tarzana accelerograph was calibrated shortly after the earthquake, and no indication of instrument malfunction was apparent in the strong motion accelerogram. This research project will investigate this anomalously high acceleration recording, on the supposition that it was a result of soil-structure interaction between the accelerograph station and the soil in which it is embedded. Such an effect was found to exist in an earlier study by the principal investigator at an accelerograph station that had a number of design features in common with the Tarzana station. The purpose to this study is (1) to determine the extent of any soil- structure interaction that may have contributed to the large recorded accelerations, (2) develop reliable analytical models to predict the soil-structure interaction effects at this station, and (3) remove the soil-structure interaction effects from the accelerogram to obtain the free-field motion.