CAJ | 학술논문

试验结果表明土石材料的动力特性参数有很强的围压依赖性，所以在高土石坝动力计算分析中考虑围压效应是十分必要的。在广泛应用的Hardin-Drnevich本构模型的基础上，提出了改进动剪切模量与动剪应变关系式及阻尼比与动剪应变关系式的方法，得到一个可以考虑围压效应的改进模型，与实际工程试验曲线对比结果表明，新模型可以较好地模拟土石料在各个围压下的动力特性。根据新模型编制相应计算程序并应用于长河坝高土石坝地震动力反应分析中，得到了大坝整体动力反应规律与大坝地震永久变形，为工程设计提供参考。
시험결과표명토석재료적동력특성삼수유흔강적위압의뢰성，소이재고토석패동력계산분석중고필위압효응시십분필요적。재엄범응용적Hardin-Drnevich본구모형적기출상，제출료개진동전절모량여동전응변관계식급조니비여동전응변관계식적방법，득도일개가이고필위압효응적개진모형，여실제공정시험곡선대비결과표명，신모형가이교호지모의토석료재각개위압하적동력특성。근거신모형편제상응계산정서병응용우장하패고토석패지진동력반응분석중，득도료대패정체동력반응규률여대패지진영구변형，위공정설계제공삼고。
Experimental results show that the dynamic properties of rockfill are strongly dependent on confining pres-sure effect. Therefore,it is very necessary to consider confining pressure effect in the seismic calculation and analysis of high rockfill dam. The relationship between dynamic shear modulus and dynamic shear strain and that between damping ratio and dynamic shear strain were improved on the basis of widely used Hardin-Drnevich constitutive model in this paper. Then a new model considering confining pressure effect was established. The new model can well simulate the dynamic properties of rockfill of a practical project under various confining pressures. A correspond-ing computational procedure was compiled and applied in the dynamic response analysis of Changheba dam. The dy-namic response features and the permanent deformation of the dam were obtained,which could provide the reference for engineering design.