- 摘 要
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(1 中國電子工程設(shè)計院結(jié)構(gòu)評估及加固所 北京 100840； 2 清華大學(xué)土木工程系 北京 100084)
［摘要］殘余變形是衡量結(jié)構(gòu)震后能否繼續(xù)滿足使用要求和可修復(fù)性的重要指標(biāo)。首先提出以殘余變形為目標(biāo)的結(jié)構(gòu)或構(gòu)件復(fù)位性能的基本概念；然后利用已開發(fā)并經(jīng)試驗驗證的纖維模型程序，完成了一榀預(yù)應(yīng)力混凝土框架試件在不同預(yù)應(yīng)力筋粘結(jié)形式下的數(shù)值模擬，初步探討了預(yù)應(yīng)力筋粘結(jié)形式對結(jié)構(gòu)復(fù)位性能的影響。計算結(jié)果表明，對于按規(guī)范設(shè)計的預(yù)應(yīng)力混凝土框架，框架柱預(yù)應(yīng)力筋粘結(jié)形式對框架的復(fù)位性能產(chǎn)生較大影響，而框架梁預(yù)應(yīng)力筋的影響則相對較小。實際工程中預(yù)應(yīng)力筋宜優(yōu)先采用部分無粘結(jié)形式。
［關(guān)鍵詞］ 預(yù)應(yīng)力混凝土；框架結(jié)構(gòu)；纖維模型；粘結(jié)形式；復(fù)位性能；部分無粘結(jié)
Influence by Bonding Styles of Prestressed Strands/Steels on Re-centering Behavior of PC Frames
Wang Xunliu1，Ye Lieping2，Lu Xinzheng2(1 China Electronics Engineering Design Institute，Beijing 100840，China； 2 Tsinghua University，Beijing 100084，China)
Abstract:Residual deformation is a key index to assess whether a structure can be reused or restored after an earthquake. A PC frame has been simulated with various bonding styles of PS by a fiber model program developed and validated with test data in this study, and some simple discussions to the effect on re-centering behavior of PS bonding styles have been given. The results of simulation indicate that, as to PC frames designed according to codes in existence, the bonding style of PS used in columns has great influence on the re-centering behavior of PC frame, while the PS of beams have relatively little effect.It should take priority to use the partially debonding style of PS in the engineering practice.
Keywords:prestressed concrete; frame structure; fiber model; bonding style; re-centering behavior; partially debonded
高等學(xué)校博士學(xué)科點專項科研基金資助課題(編號20040003095)。
參考文獻(xiàn)
［1］ZATAR W, MUTSUYOSHI H. Residual displacements of concrete bridge piers subjected to near field earthquakes［Ｊ］. ACI Structural Journal, 2002, 99(6): 740-749．
［2］PAULAY T,PRIESTLEY M J N. Seismic Design of Reinforced Concrete and Masonry Buildings［Ｍ］. John Wiley and Sons Inc., 1992, 98-106．
［3］PRIESTLEY M J N. Myths and Fallacy in Earthquake Engineering-conflicts Between Design and Reality［Ｍ］. Concrete International, 1997,54-63．
［4］李應(yīng)斌, 劉伯權(quán), 史慶軒. 基于結(jié)構(gòu)性能的抗震設(shè)計理論研究與展望［Ｊ］. 地震工程與工程振動, 2001, 21(4): 73-79．
［5］汪訓(xùn)流, 葉列平, 陸新征. 往復(fù)荷載下預(yù)應(yīng)力混凝土框架的數(shù)值模擬［Ｊ］．工程抗震與加固改造, 2006, 28(6): 25-29．
［6］汪訓(xùn)流. 配置高強鋼絞線無粘結(jié)筋混凝土柱復(fù)位性能的研究［D］. 北京: 清華大學(xué), 2007．
［7］汪訓(xùn)流, 陸新征, 葉列平. 往復(fù)荷載下鋼筋混凝土柱受力性能的數(shù)值模擬［Ｊ］. 工程力學(xué), 2007, 24(12): 76-81．
［8］蘇小卒．預(yù)應(yīng)力混凝土框架抗震性能研究［Ｍ］．上海科學(xué)技術(shù)出版社，1998．
［9］MSC. Marc 2005在線幫助文檔．
［10］L?GERON F, PAULTRE P. Uniaxial confinement model for normal and high-strength concrete columns［J］. J Struct Eng, ASCE, 2003,129(2): 241-252.
［11］江見鯨，陸新征，葉列平. 混凝土結(jié)構(gòu)有限元分析［M］. 北京：清華大學(xué)出版社，2005.
［12］ESMAEILY A, XIAO Y. Behavior of reinforced concrete columns under variable axial Loads: analysis［J］.ACI Structural Journal, 2005, 102(5): 736-744.
［13］L?GERON F, PAULTRE P, MAZAR J. Damage mechanics modeling of nonlinear seismic behavior of concrete structures［J］. J Struct Eng, ASCE, 2005, 131(6): 946-954.
［14］鋼筋混凝土結(jié)構(gòu)設(shè)計規(guī)范(TJ10—74)［Ｓ］, 1974.
［15］工業(yè)與民用建筑抗震設(shè)計規(guī)范(TJ11—78)［Ｓ］．1978.
［16］PRESTLEY M J N, TAO J R. Seismic response of precast prestressed concrete frame with partially debonded tensions［J］. PCI Journal, 38(1):58-69.
