本文選題：空間桁架 + 彈性后屈曲��； 參考：《鄭州大學學報(理學版)》2016年01期

【摘要】：空間桁架結構在軸向壓力作用下容易發(fā)生失穩(wěn),采用合理的鋼材本構關系進行分析是準確追蹤桁架屈曲后行為的有效方法.借助Open Sees軟件平臺,基于桁架非彈性后屈曲單軸材料本構模型,根據(jù)滯回準則,提出了該本構模型新的實現(xiàn)方式;將模型分解為受拉屈服前卸載、受拉屈服后卸載、受壓屈服前卸載和受壓屈服后卸載4種加卸載路徑,基于材料基類編制了空間桁架彈性后屈曲、非彈性后屈曲本構模型,通過算例驗證了這些本構模型的正確性,并為如何采用這些模型進行空間桁架結構分析提出了建議.
[Abstract]:Space truss structures are prone to instability under axial pressure. It is an effective method to accurately track the post-buckling behavior of truss structures by means of reasonable steel constitutive relations. Based on the unelastic post-buckling uniaxial material constitutive model of truss and hysteretic criterion, a new implementation method of the constitutive model is proposed, which is decomposed into unloading before tensile yield and unloading after tensile yield. There are four loading and unloading paths before and after compression yield. Based on the material class, the post-buckling and inelastic post-buckling constitutive models of space truss are developed. The correctness of these models is verified by an example. Suggestions on how to use these models to analyze space truss structures are also given.
【作者單位】： 鄭州大學土木工程學院;
【基金】：河南省科技攻關計劃項目(142102310345)
【分類號】：O344.1

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本文編號：2012462