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    江曉峰
    (華東建筑設(shè)計(jì)研究院有限公司，上海200002)

[摘要] 基于顯式動(dòng)力程序LS-DYNA數(shù)值計(jì)算平臺(tái)，對(duì)其大震彈塑性時(shí)程分析的模擬方法與構(gòu)件抗震性能評(píng)價(jià)方法進(jìn)行研究和開(kāi)發(fā)。首先在LS-DYNA材料庫(kù)基礎(chǔ)上開(kāi)發(fā)了近50種復(fù)雜形式的典型截面，用于鋼結(jié)構(gòu)、鋼筋混凝土及型鋼混凝土等構(gòu)件的參數(shù)化輸入和纖維單元計(jì)算，經(jīng)驗(yàn)證具有良好的計(jì)算精度。然后介紹了纖維積分單元的構(gòu)件抗彎承載力誤差估計(jì)和關(guān)于單元網(wǎng)格自動(dòng)細(xì)分的子程序開(kāi)發(fā)，同時(shí)介紹了鋼結(jié)構(gòu)構(gòu)件等效初始缺陷的模擬方法。為合理且直觀地評(píng)價(jià)結(jié)構(gòu)構(gòu)件的延性與塑性變形，建立了類似于美國(guó)ASCE 41-06的延性評(píng)價(jià)方法，并開(kāi)發(fā)了有關(guān)程序。最后簡(jiǎn)單介紹了從模型接口到數(shù)據(jù)后處理的各項(xiàng)程序開(kāi)發(fā)工作，以及已經(jīng)完成的工程應(yīng)用情況。經(jīng)驗(yàn)證該數(shù)值方法具有合適的工程精度和高效的計(jì)算能力。
[關(guān)鍵詞] LS-DYNA；彈塑性時(shí)程分析；性能設(shè)計(jì)；程序開(kāi)發(fā)
中圖分類號(hào)：TU313.3    文獻(xiàn)標(biāo)識(shí)碼：A    文章編號(hào)：1002-848X(2012) S2-0018-06

Development and application of elasto-plastic time-history analysis based on LS-DYNA
Jiang Xiaofeng
( East China Architectural Design & Research Institute Co.,  Ltd.,  Shanghai 200002,  China)

Abstract: Based on the numerical platform of explicit analysis program LS-DYNA, the method of modeling and performance evaluation was studied and developed for elasto-plastic time-lustory analysis in major earthquake. Relying on the materiallibrary in LS-DYNA, nearly 50 complicated common sections were firstly developed with good accuracy, to aclueve convenient parametric input and fiber element analysis for steel structure, RC and SRC structure. Then the error estimation for flexural capacity of fiber integration element and program development of mesh refining to beam elements was introduced, and the simulation method for effective initial imperfection of steel members was also presented. To achieve a reasonable and clear-cut evaluation method for ductility and plastic deformation, one methodology similar to ASEC 41-06 was put foreword and subprogram was developed. Finally, some program developments from modeling transformation interface to result post-processing were briefly introduced and some finished applications were also briefly presented. This numerical method is verified to have good precision and efficient computational capacity.
Keywords: LS-DYNA; elasto-plastic time-history analysis; performance-based design; program development