Research on Restoring Force Model of Unbonded Partially Prestressed Concrete Beams

TANG Chang-hui, NI Jia, CHENG Ming-hui

Abstract

Based on the secondary development platform of OpenSEES software, this paper studied the restoring force model of unbonded partially prestressed concrete beam sections. According to the statistics of experiments and theoretical analysis, the moment-curvature hysteretic model of the section for unbonded partially prestressed concrete beams was established, and planted into Material class in the software of OpenSEES by compiling Visual C++ programs, which is used for the nonlinear analysis of unbonded partially prestressed concrete structure without iterative calculation of stress increment for unbonded prestressed tendon. The crucial problem of stress analysis for unbonded partially prestressed concrete structure was then solved. Moreover, under displacement control, this paper considered the nonlinear beam-column element based on flexibility to calculate the moment-deflection hysteretic curves of unbonded partially prestressed concrete beams under low cyclic reversed loading on the basis of established restoring force model. The calculation results are reasonably identical to experiment results, which indicates the reliability of established restoring force model, and provides theoretical basis for the nonlinear analysis of unbonded partially prestressed concrete structures.

 

 

Keywords: unbonded partially prestressed concrete beams,  low cyclic reversed loading,  OpenSEES,  restoring force model,  moment-deflection hysteretic curves


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References


DU Gong-chcn. Partial prcstrcsscd concrctc [М]. Beijing: China Architccturc and Building Press l990.89 — 94. (In Chinese)

TANG Chang-hui. NI Jia. YE Lin. Nonlinear full range hysteretic analysis on unbonded partically prestressed concrete beams[J]. Journal of Hunan University: Natural Scicnccs. 2015.42(7).62-68. (In Chinese)

TANG Chang-hui. YI Wci-jian. SHEN Pu-shcng. The contribution to the flexural stiffness of the unbounded tendons in prestressed concrctc beams[J]. Journal of Hunan University: Natural Scicnccs. 2001.28(5) :75 —79. (In Chinese)

TANG Chang-hui. LIU Dong-min. LI Yun. Research on restoring forcc model of unbonded partically prestressed concrctc beams with symmetrical tendons [J]. Building Structure.2015. 45(4) .68 — 72. (In Chinese)

GB50010 — 2010 Code for design of concrctc structures [S]. Beijing. China Architecture and Building Press. 2010. 37 — 38. (In Chinese)

JGJ92--2004 Technical specification for concrctc structures prestressed with unbounded tendons [S]. Beijing: China Architecture and Building Press. 1993. 13 — 23. (In Chinese)

SCOTT M H. FENVESG L. How to introduce a new material into OpenSees [R]. Berkeley. PEER. University of California. Berkeley. 2001:1 — 23.

MCKENNA F T. Object-oriented finite element programming: frameworks for analysis, algorithms and parallel compu-ting [D]. Berkeley: University of California. Berkeley. College of Engineering. 1997:11 —45.

FILIPPOU F C. TAUCER F F. SPACONE E. A fiber beam-column element for seismic response analysis of reinforced concrete structures!!R]. Berkeley: Earthquake Engineering Research Center. College of Engineering. University of California. Berkeley. 1991:23-88.

CHEN Xue-wei. LIN Zhe. Structural nonlinear analysis program OpcnSEES theory and tutoria l[M]. Beijing: China Architecture and Building Press. 2014:15 — 36. (In Chinese)

CHEN Xuc-wci, HAN Xiao-Ici. SUN Si-wei. Research and development of three nonlinear bcam-column elcmcnts [J]. Engineering Mechanics.20l 1.28(SI) :5-11. (In Chinese)

MUGURUMA H. Study on low-cycle fatigue strength of post-tensioned unbonded prestressed concrete beams[J]. СЕВ Bulletin D*information.1979,381 — 384. (In Japanese)


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