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（中國中元國際工程有限公司， 北京 100089）

［摘要］為提高ABAQUS在超高層建筑動(dòng)力彈塑性模擬方面的適用性問題，提高ABAQUS的建模、計(jì)算效率及應(yīng)用的靈活性，基于塑性損傷力學(xué)理論獨(dú)立開發(fā)了適用于混凝土梁柱纖維模型的混凝土一維拉壓循環(huán)加載材料模型。利用鋼筋混凝土板的塑性絞線理論解決了異形鋼筋混凝土板的導(dǎo)荷問題，同時(shí)利用鋪網(wǎng)格法實(shí)現(xiàn)了對(duì)樓板及墻單元的精細(xì)剖分。通過用戶子程序開發(fā)，實(shí)現(xiàn)了在ABAQUS顯式算法中應(yīng)用振型阻尼，避免了在顯式算法中采用瑞雷阻尼帶來的模擬精度難以保證的問題。根據(jù)ABAQUS的能力和特點(diǎn)，完善了隱式算法和顯式算法對(duì)超高層結(jié)構(gòu)的模擬路徑。通過采取適當(dāng)措施在兩種算法中均實(shí)現(xiàn)了計(jì)算精度與計(jì)算速度的統(tǒng)一。對(duì)比研究算例顯示，隱式積分算法與振型疊加法結(jié)果較為接近。顯式積分算法對(duì)阻尼比的取值較為敏感，同樣的阻尼比取值達(dá)到的阻尼效果比隱式積分算法大。

［關(guān)鍵詞］動(dòng)力彈塑性分析； 隱式算法； 顯式算法； 阻尼效果； 材料模型

中圖分類號(hào)：O344-3， TU973文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2018)21-0001-08

Application study on ABAQUS in dynamic elasto-plastic analysis of super high-rise buildings

Wang Wenyuan， Zhang Tongyi

(China IPPR International Engineering Co.,  Ltd.,  Beijing 100089, China)

Abstract: The main research interest is  to improve the feasibility of ABAQUS in modeling the dynamic elasto-plastic behaviors of super high-rise buildings, and  to improve the modeling and computational efficiency and the application flexibility of ABAQUS. A material model based on plastic and fracture mechanics was proposed for concrete under uniaxial tensile-compression cyclic loading. Upon plastic hinge theory of reinforced concrete slab, an innovative meshing procedure including load transferring mechanism was recommended for irregular shaped slabs. Meanwhile, the laying grid meshing method was also introduced for elastic slabs and walls for an explicit meshing purpose. The orthogonal damping matrix was formed for the structural system and the corresponding damping load of each story was applied through user subroutine. According to the capabilities and characteristics of ABAQUS, the simulation path of implicit and explicit algorithms for super high-rise structures was improved. The unification of calculation accuracy and calculation speed was achieved in both methods by taking appropriate measures. The comparison study shows that the implicit method achieves closer result to mode supposition method than the explicit method taking the same damping ratio. The explicit integration algorithm is sensitive to the value of damping, and the same damping ratio value results a greater damping effect in explicit method than in implicit method.

Keywords:dynamic elasto-plastic analysis; implicit method; explicit method; damping effect; material model

作者簡(jiǎn)介：王文淵，博士，教授級(jí)高級(jí)工程師，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email:wangwenyuan@ippr.net。