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基于动力性能的PC梁有效预应力预测

, PP. 37-40

Keywords: 桥梁工程,简支梁,振动频率,有效预应力,后张法

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Abstract:

为了对在役混凝土桥梁结构有效预应力进行预测,采用后张法对不同截面形式、不同配束方式和不同材料特性的混凝土简支梁缩尺模型施加纵向预加力,测试其自振频率和振型。试验结果表明,预加力对简支梁振动基频的影响规律与配束方式有关,振动基频变化量值取决于截面形式、材料特性和预应力束偏心距。基于实测数据,回归出混凝土简支梁有效刚度与预加力之间的函数表达式,最终提出预测混凝土简支梁有效预应力的动力测试方法。

References

[1]  TG H11―2004,公路桥涵养护规范[S].
[2]  刘龄嘉,赵小星,贺拴海.混凝土模型梁模态试验方法[J].长安大学学报:自然科学版,2007,27(5):58?61. LIU Ling?jia,ZHAO Xiao?xing,HE Shuan?hai.Modal test method for concrete beams model[J].Journal of Chang?an University:Natural Science Edition,2007,27(5):58?61.
[3]  薛伟辰,胡于明,王巍.预应力混凝土梁徐变性能试验[J].中国公路学报,2008,21(4):61?66. XUE Wei?chen,HU Yu?ming,WANG Wei.Experiment on creep behaviors of prestressed concrete beams[J].China Journal of Highway and Transport,2008,21(4):61?66.
[4]  楼梦麟,洪婷婷.预应力梁横向振动分析的模态摄动方法[J].工程力学,2006,23(1):107?111. LOU Meng?lin,HONG Ting?ting.Mode perturbation method for lateral vibration analysis of prestressed beams[J].Engineering Mechanics,2006,23(1):107?111.
[5]  Hamed E,Frosting Y.Natural frequencies of bonded and unbonded prestressed beams?prestress force effects[J].Journal of Sound and Vibration,2006,295(1/2):28?39.
[6]  吕中荣,罗绍湘,刘济科.预应力对预应力梁振动的影响[J].中山大学学报:自然科学版, 2006,45(2):119?120,128. LU Zhong?rong,LUO Shao?xiang,LIU Ji?ke.Effects of prestress force on vibration of a prestressed beam[J].ACTA Scientiarum Naturalium Universitatis Sunyatseni,2006,45(2):119?120,128.
[7]  刘龄嘉,贺拴海,赵小星.在役混凝土简支梁有效预应力计算[J].交通运输工程学报,2005,5(3):47?51. LIU Ling?jia,HE Shuan?hai,ZHAO Xiao?xing.Effective prestress computation of existing PC simply?supported beam[J].Journal of Traffic and Transportation Engineering,2005,5(3):47?51.
[8]  Mo L Y,Perng F S,Hwang L W.Dynamic behavior of frames containing prestressed concrete beams[J].Magazine of Concrete Research,2001,53(2):101?105.

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