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一、序言对土壤和土壤-结构相互作用进行地震反应分析时,将土壤的非线性和非弹性结合在一起进行研究,对土工工程师和地震工程师来说是很有意义的。现今,土壤特性一般是在实验室内采用常规的(均匀幅值)循环加载应力或应变的方法来测定。已有人提出了诸如等效线-粘弹性、弹-塑性、粘塑性等各种本构关系来模拟土壤特性。分析的精确性在很大程度上依赖用来描述土壤动力反应的数学模型的功能和可靠性。目前,我们还在继续探索更为满意的本构模型,这是地震工程专业面临的最艰巨的任务之一。
I. INTRODUCTION In the seismic response analysis of soil and soil-structure interactions, the combination of nonlinear and inelastic soils is of great significance to geotechnical engineers and earthquake engineers. Today, soil properties are generally measured in the laboratory using conventional (uniform amplitude) cyclic loading stress or strain methods. Various constitutive relationships such as isokinetic-viscoelastic, elastic-plastic, and viscoplastic have been proposed to simulate soil properties. The accuracy of the analysis depends to a large extent on the function and reliability of the mathematical model used to describe the dynamic response of the soil. At present, we are still continuing to explore more satisfactory constitutive models. This is one of the most difficult tasks facing the earthquake engineering profession.