- 摘 要
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（湖南大學(xué)土木工程學(xué)院， 長沙 410082）
［摘要］在闡述OpenSEES軟件解決無粘結(jié)部分預(yù)應(yīng)力混凝土梁非線性分析的基礎(chǔ)上，對無粘結(jié)部分預(yù)應(yīng)力混凝土梁在低周反復(fù)荷載作用下的恢復(fù)力模型進(jìn)行了研究。著重介紹了無粘結(jié)預(yù)應(yīng)力筋等材料本構(gòu)模型的選取和基于柔度法的梁柱非線性分析方法及其計算框圖，計算了無粘結(jié)部分預(yù)應(yīng)力混凝土梁在低周反復(fù)荷載作用下的彎矩-撓度滯回曲線，與試驗曲線比較得到了令人滿意的結(jié)果，為OpenSEES解決無粘結(jié)部分預(yù)應(yīng)力混凝土結(jié)構(gòu)恢復(fù)力模型提供了一條新的途徑。
［關(guān)鍵詞］無粘結(jié)部分預(yù)應(yīng)力混凝土梁； 低周反復(fù)荷載； OpenSEES； 恢復(fù)力模型； 彎矩-撓度滯回曲線
中圖分類號： TU378.2 文獻(xiàn)標(biāo)識碼： A文章編號： 1002-848X(2016)S1-0691-05
Research on restoring force model of unbonded partially prestressed
concrete beams based on OpenSEES
Tang Changhui， Ni Jia， Chen Minghui
(Department of Civil Engineering， Hunan University， Changsha 410082， China)
Abstract: On the basis of demonstrating the applicability of OpenSEES in nonlinear analysis of unbonded partially prestressed concrete beams, restoring force model of unbonded partially prestressed concrete beams under low cyclic reversed loading was researched. Material constitutive model of unbounded prestressed reinforcement etc. and method of nonlinear analysis based on nonlinear beam column element were emphasized. Moment-deflection hysteretic curves of unbonded partially prestressed concrete beams under low cyclic reversed loading are calculated. The calculation results agree reasonable with experiment results, which provide a new way to research restoring force model of unbonded prestressed concrete structures utilizing OpenSEES software.
Keywords: unbonded partially prestressed concrete beam; low cyclic reversed loading; OpenSEES; restoring force model; moment-deflection hysteretic curve
作者簡介： 唐昌輝，博士，副教授，Email:tchui2010@126.com。
*國家自然科學(xué)基金項目（51278179）。
