Analysis of Tank Damage During the Northridge Earthquake

9416484哈龙北岭地震造成若干地面坦克损坏，甚至一些改装坦克受损。强烈摇晃地区的公用事业和工业设施包括大量各种类型的油罐，在损坏和未损坏的油罐附近获得了许多记录。大量的地震动数据和结构反应的观测对抗震设计具有重要的指导意义。该项目将对储罐结构的性能进行如下研究：收集地面储水罐和石油储罐所受损坏的数据和文件。计算典型储罐的动力响应，并将计算的响应与观察到的损坏或无损坏进行关联。研究了长周期分量对晃动现象的影响。对改装后储罐的损坏情况进行研究，以推断实施改装机制效果不佳的原因。具体地说，建议对锚杆的损伤进行研究，以设计改进锚杆系统的方法。将诱发地震力与现有规范和标准(如API 650、AWWA 100、EPRI、UBC和新西兰建议)规定的地震力进行比较。充液储罐的非线性晃动、储罐壳体的大象脚屈曲、液-结构-土联合作用等方面的研究取得了新的进展。现在是比较地震荷载下的预测反应和实际行为的好时机，以改进和调整这些方法，并提供改进的抗震设计程序。这是一个北岭地震项目。***

9416484 Haroun The Northridge earthquake induced a number of incidents of damage to ground-based tanks, and even to some retrofitted tanks. Utilities and industrial facilities in the strong shaking area include a large inventory of tanks of all types, and many records have been obtained in the vicinity of damaged and undamaged tanks. The mass of data on earthquake ground motions and observations of the structural response have important implications for the earthquake resistant design. This is project will study the performance of tank structures as follows: Collection of data and documentation of the damaged sustained by ground-based water and petroleum storage tanks. Calculation of the dynamic response of representative tanks and correlation of the computed response with observed damage or lack of damage. Study of the effects of long period components on the sloshing phenomenon. Study of the damage to retrofitted tanks to deduce the reasons for the ineffectiveness of implemented to retrofit mechanisms. Specifically, a study of damage to the anchors is proposed to devise improved ways for the anchoring system. Comparison of induced seismic forces with those specified by available codes and standards such as API 650, AWWA 100, EPRI, UBC and the New Zealand Recommendations. New advances have been made in the analysis of liquid-filled tanks such as non-linear sloshing of liquids, elephant foot buckling of the tank shell, and combined liquid-structure-soil interaction. This is an opportune time to compare the predicted response with actual behavior under earthquake loading to refine and tune these methods and to provide improved seismic design procedures. This is a Northridge Earthquake project. ***