地震工程学报2016，Vol.38Issue(6)：896-902,7.DOI:10.3969/j.issn.1000-0844.2016.06.0896
小应变硬化模型（HSS）在 Rayleigh 波作用下场地响应分析中的应用
Application of Hardening Small Strain Model in the Site Response Analysis under Rayleigh Wave Excitation
摘要
Abstract
This study examines the dynamic response characteristics of surface waves mainly com-prising Rayleigh waves in surface soils under impact and seismic loads.Moreover,the study analyzes,through numerical simulation,the settling methods of soil layer damping.The research area for this study is the shallow plain fill and silty clay of the Xiamen area.The model was generated using finite element dynamic analysis,with a hardening small strain model (HSS)for soil constitutive.The hysteresis characteristics of the model allowed the input of different small strain parameters to study the influence of HSS model's small strain parameters on site dynamic response.Results were then compared with the combined Mohr-Coulomb (MC) model and Rayleigh damping model (MC + Rayleigh damping).The study shows that when using HSS model with hysteresis,the wave speed increases with increases in the initial shear modulus;however,amplitude and residual deformation decline.While the HSS model can reach the residual deformation value,"MC + Rayleigh damping" cannot.This reflects the accumulation of plastic strain and the damping effect during the process of unloading and reloading as the constitutive model is an ideal elastic-plastic model that demonstrates pure elastic behavior under the conditions of unloading and reloading.However,as the HSS model cannot fully reflect the accu-mulation of plastic volume strain under the effect of reloading and taking hysteresis damping into consideration,the use of the Rayleigh damping model is advised to allow full simulation of the real damping characteristics of the soil.关键词
小应变硬化模型(HSS)/瑞利阻尼/Rayleigh 波/地震动力响应/有限元动力分析Key words
hardening small strain model/Rayleigh damping/Rayleigh wave/seismic dynamic response/finite element dynamic analysis分类
建筑与水利引用本文复制引用
施有志,林树枝,杨荣华..小应变硬化模型（HSS）在 Rayleigh 波作用下场地响应分析中的应用[J].地震工程学报,2016,38(6):896-902,7.基金项目
福建省自然科学基金资助项目(2016J01271) （2016J01271）
福建省住房和城乡建设厅科学技术项目(2015-K-38) （2015-K-38）
福建省住房和城乡建设厅科学技术项目(2016-K-26) （2016-K-26）
