【作者】 张诚诚； 胡梅； 张耀庭；

【Author】 Zhang Chengcheng;Hu Mei;Zhang Yaoting;Huazhong University of Science and Technology,School of Civil Engineering and Mechanics;

【机构】 华中科技大学土木工程与力学学院；

【摘要】 随着开源有限元软件的出现,OpenSees在普通钢筋混凝土结构的抗震分析中,已经成为最有影响的分析平台之一,为进一步探讨利用OpenSees软件进行预应力混凝土结构建模分析的方法,本文按我国《预应力混凝土结构抗震设计规程》(JGJ 140-2004),设计了一榀预应力混凝土框架结构,建模时分别选用OpenSees数据库中不同的钢筋本构模型(Steel01,Steel02,Reinforcing Steel)和混凝土本构模型(Concret01,Concret02),并对设计的预应力混凝土框架结构进行拟静力分析以及弹塑性动力时程分析;再选择不同的积分点数,得出其拟静力以及弹塑性动力时程分析结果。结果表明:OpenSees中现有的混凝土本构模型已经相当成熟,而钢筋本构模型的改变对模拟结果的影响并非很大,其发展还有待提高;同时积分点数目对模拟结果变化不大,但积分点太少时计算不准确,积分点太多时计算不收敛,选择合适的积分点非常重要。更多还原

【Abstract】 With the development of the open source finite element software,OpenSees in seismic analysis of reinforced concrete structure,has become the most influential platform.In order to further explore using OpenSees software to modele analysis methods of prestressed concrete structures,designing a prestressed frame structure according to the standard and chosing constitutive models for reinforced steel(SteelOl,Steel 02,Reinforcing Steel) and concrete(ConcretOl,Concret 02)in OpenSees database.For the prestressed concrete frame structure,using above constitutive models to do the Pushover analysis and Time history analysis.Moreover,reasearching the effects of Gauss-Points is very important as well.After the numerical simulation,we can find that existing concrete constitutive models are quite mature,while constitutive models of steel are not because its simulation is not very well.Gauss Points numbers have a great influence on the simulation results also,little Gauss Points are not accurate while much Gauss Points can’t convergence,choosing the appropriate Gauss Points is essential.更多还原