本文關(guān)鍵詞： 修正不規(guī)則加卸載準(zhǔn)則 Davidenkov本構(gòu)模型 等效剪應(yīng)變算法 場(chǎng)地地震效應(yīng) 非線性　出處：《巖土工程學(xué)報(bào)》2017年05期 　論文類(lèi)型：期刊論文

【摘要】：非等幅循環(huán)荷載作用下,采用"擴(kuò)展Masing"法則修正應(yīng)力 應(yīng)變滯回曲線時(shí),程序的實(shí)現(xiàn)過(guò)程中需要預(yù)留大量的狀態(tài)變量。針對(duì)該問(wèn)題,提出了Davidenkov本構(gòu)模型的不規(guī)則加卸載修正準(zhǔn)則,以代替"擴(kuò)展Masing"法則中的"上大圈"準(zhǔn)則。通過(guò)等效剪應(yīng)變算法的比選,給出了加卸載判據(jù)簡(jiǎn)單且精度更高的等效剪應(yīng)變算法�；贏BAQUS軟件的顯式模塊,開(kāi)發(fā)了基于不規(guī)則加卸載準(zhǔn)則的修正Davidenkov本構(gòu)模型的顯式子程序模塊,適用于大規(guī)模二維和三維場(chǎng)地非線性地震效應(yīng)分析。選取Mississippi灣500 m深的鉆孔作為計(jì)算模型,通過(guò)與一維場(chǎng)地非線性地震效應(yīng)分析專(zhuān)業(yè)程序Deepsoil計(jì)算得到的輸入不同強(qiáng)度地震動(dòng)下的地表峰值加速度、PGA=0.65g的場(chǎng)地地震反應(yīng)的對(duì)比分析,佐證了提出的Davidenkov本構(gòu)模型不規(guī)則加卸載準(zhǔn)則與等效剪應(yīng)變算法的合理性。
[Abstract]:When the normal stress and strain hysteretic curve is revised by "extended Masing" rule under the action of non-constant amplitude cyclic load, a large number of state variables need to be reserved in the process of implementation of the program. To solve this problem, a large number of state variables need to be reserved. In this paper, the irregular loading and unloading correction criterion of Davidenkov constitutive model is proposed to replace the "upper large cycle" criterion of "extended Masing" rule. The equivalent shear strain algorithm with simple loading and unloading criterion and higher precision is presented. The explicit module based on ABAQUS software is presented. The explicit subroutine module of modified Davidenkov constitutive model based on irregular loading and unloading criterion is developed. It is suitable for large scale 2D and 3D site nonlinear seismic effect analysis. A 500m deep borehole in Mississippi Bay is selected as the calculation model. The peak acceleration of ground surface under different intensity ground motion is calculated by using Deepsoil program which is a professional program for nonlinear seismic effect analysis of one-dimensional site. The comparative analysis of PGA=0.65g 's site seismic response proves the rationality of the proposed Davidenkov constitutive model for irregular loading and unloading criteria and equivalent shear strain algorithm.
【作者單位】： 南京工業(yè)大學(xué)巖土工程研究所;江蘇省土木工程防震技術(shù)研究中心;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(51378258,51438004) 國(guó)家科技重大專(zhuān)項(xiàng)項(xiàng)目(2013ZX06002001-9) 國(guó)家青年自然科學(xué)基金項(xiàng)目(51508271) 江蘇省青年自然科學(xué)基金項(xiàng)目(BK20150958)
【分類(lèi)號(hào)】：TU435
【正文快照】： 在場(chǎng)地非線性地震反應(yīng)計(jì)算中,核心問(wèn)題在于選擇合適的土體非線性本構(gòu)模型及其合理的數(shù)值模擬實(shí)現(xiàn)方法。大量試驗(yàn)研究表明,采用三參數(shù)的*通訊作者(E-mail:gxc6307@163.com)Davidenkov本構(gòu)模型能較為理想地描述各類(lèi)土體的非線性動(dòng)力特性,累積的試驗(yàn)資料非常豐富[1-3]。由于地震，

本文編號(hào)：1459098