ABSTRACT

A detailed numerical framework for seismic analysis of liquid storage tanks considering soil-structure interaction (SSI) is presented. Lumped mass model for the tank and finite element approach for the soil domain are adopted. Effects of SSI on seismic performance of ground supported and elevated liquid storage tanks, with fixed base and base isolated conditions, are studied under near-field and far-field ground motions. Effect of SSI on fixed base tanks is found to be similar under different types of ground motions. Nevertheless, effectiveness of isolation systems with different stiffness characteristics depends on soil type, tank slenderness ratio, and ground motion types.

摘要

提出了考虑土壤-结构相互作用 (SSI) 的液体储罐地震分析的详细数值框架。罐体采用集总质量模型，土域采用有限元法。在近场和远场地面运动下，研究了SSI对地面支撑和高架液体储罐抗震性能的影响，具有固定底座和底座隔离条件。在不同类型的地面运动下，SSI 对固定基础油箱的影响是相似的。然而，具有不同刚度特性的隔离系统的有效性取决于土壤类型、储罐长细比和地面运动类型。