發(fā)布時間：2018-10-14 11:07

【摘要】：合理選擇本構模型是土動力學問題數(shù)值模擬中的一項重要工作。利用PLAXIS 2D軟件的土工實驗模擬功能分別對4種常用的巖土本構模型——線彈性模型、摩爾庫倫模型、土體硬化模型和小應變土體硬化模型在往復荷載下的理論滯回曲線進行了對比分析,并在此基礎上研究了選擇不同本構模型對自由場地震反應分析結果的影響以及不同本構模型中各參數(shù)的變化對場地動力計算結果的敏感性分析。研究結果為土動力學問題數(shù)值模擬中如何選擇本構模型和合理判斷數(shù)值分析結果提供了參考依據(jù)。
[Abstract]:Reasonable selection of constitutive model is an important work in numerical simulation of soil dynamics. By using the geotechnical experiment simulation function of PLAXIS 2D software, four kinds of geotechnical constitutive models, namely linear elastic model, Moore Coulomb model, are studied respectively. The theoretical hysteretic curves of soil hardening model and small strain soil hardening model under reciprocating load are compared and analyzed. On this basis, the influence of choosing different constitutive models on the results of free field seismic response analysis and the sensitivity analysis of the variation of parameters in different constitutive models to the results of site dynamic calculation are studied. The results provide a reference for the selection of constitutive model and the reasonable judgment of numerical analysis results in soil dynamics numerical simulation.
【作者單位】： 石家莊鐵道大學土木工程學院;
【基金】：河北省大型基礎設施防災減災協(xié)同創(chuàng)新中心項目 河北省重點學科建設項目(橋梁與隧道工程)
【分類號】：TU435
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本文編號：2270270