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新旧混凝土梁横向拼接的收缩徐变效应

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Keywords: 桥梁工程,桥梁拼接,弹性力学求解法,收缩,徐变,纵向应力,剪力流

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Abstract:

?为分析混凝土收缩徐变对新旧桥梁拼接的影响,在不考虑梁自重的情况下,采用弹性力学求解法分析了新旧梁横向拼接后新梁的收缩徐变效应,推导了拼接后新梁上的纵向拉应力及拼接处的剪力计算公式。以钢筋混凝土简支T型梁桥的拼接为例,比较了新梁在不同混凝土龄期时与旧梁拼接所产生的纵向拉应力和剪应力,同时还对比了不同环境年平均相对湿度对新梁上纵向拉应力和剪应力的影响。计算结果表明:拼接时新梁混凝土龄期和不同环境年平均相对湿度对拼接结构的受力影响较大,新旧梁拼接设计时须采取相应措施以减少混凝土收缩。

References

[1]  吴小平, 宋一凡, 贺拴海.公路钢筋混凝土梁桥的长期挠度分析[J].交通运输工程学报, 2001, 1(4):48-50.
[2]  沈蒲生, 方 辉, 夏心红, 等.考虑施工过程和收缩徐变的框架结构简化分析[J].建筑科学与工程学报, 2006, 23(2):41-45.
[3]  BARR B, HOSEINIAN S B, BEYGI M A.Shrinkage of Concrete Stored in Natural Environments[J].Cement & Concrete Composites, 2003, 25(1):19-29.
[4]  YAN Dong-huang, TIAN Zhong-chu, LI Xue-wen, et al.Finite Element Method and Application for the Shrinkage and Creep of Concrete Bridges[J].China Journal of Highway and Transport, 2004, 17(2):55-58.
[5]  WANG Hua, XUE Wei-chen.Deflections of Steel-concrete Composite Beams Due to Shrinkage and Creep[J].Journal of Changan University:Natural Science Edition, 2004, 24(1):56-60.
[6]  WANG Tie-meng.Control for Engineering Structure Crack[M].Beijing:China Architecture & Building Press, 1997.
[7]  LIU Zhe-feng, SHEN Pu-sheng, GONG Hu-guang.Static Elastic-plastic Analysis of Frame Structure Based on Force Analogy Method[J].Journal of Architecture and Civil Engineering, 2006, 23(3):32-36.
[8]  BAZANT Z P.Prediction of Concrete Creep Effects Using Age-adjusted Effective Modulus Method[J].ACI Structural Journal, 1972, 69(2):212-217.
[9]  WANG Xun-wen, PAN Jia-ying.Evaluating Aging Coefficient x in Age-adjusted Effective Modulus Method[J].China Railway Science, 1996, 17(3):12-23.
[10]  JTG D62—2004, Code for Highway Reinforced Concrete and Prestress Concrete Bridge Culvert Design[S].
[11]  SHI Shi-sheng.Shear Strength, Modulus of Rigidity and Youngs Modulus of Concrete[J].China Civil Engineering Journal, 1999, 32(2):47-52.
[12]  WU Xiao-ping, SONG Yi-fan, HE Shuan-hai.Analysis of Long-term Deflection of Reinforced Concrete Beams[J].Journal of Traffic and Transportation Engineering, 2001, 1(4):48-50.
[13]  SHEN Pu-sheng, FANG Hui, XIA Xin-hong, et al.Simplified Analysis for Frame Structure Considering Construction Process, Shrinkage and Creep[J].Journal of Architecture and Civil Engineering, 2006, 23(2):41-45.
[14]  颜东煌, 田仲初, 李学文, 等.混凝土桥梁收缩徐变计算的有限元方法与应用[J].中国公路学报, 2004, 17(2):55-58.
[15]  王 骅, 薛伟辰.考虑收缩徐变的钢-混凝土组合梁变形计算[J].长安大学学报:自然科学版, 2004, 24(1):56-60.
[16]  王铁梦.工程结构裂缝控制[M].北京:中国建筑工业出版社, 1997.
[17]  刘哲锋, 沈蒲生, 龚胡广.基于拟力法的框架结构静力弹塑性分析[J].建筑科学与工程学报, 2006, 23(3):32-36.
[18]  BRADFORD M A.Deflections of Composite Beams Subject to Creep and Shrinkage[J].ACI Structural Journal, 1991, 88(5):610-615.
[19]  王勋文, 潘家英.按龄期调整有效模量法中老化系数x的取值问题[J].中国铁道科学, 1996, 17(3):12-23.
[20]  BRADFORD M A.Shrinkage Behavior of Steel-concrete Composite Beams[J].ACI Structural Journal, 1997, 94(6):625-632.
[21]  JTG D62—2004, 公路钢筋混凝土及预应力混凝土桥涵设计规范[S].
[22]  施士昇.混凝土的抗剪强度、剪切模量和弹性模量[J].土木工程学报, 1999, 32(2):47-52.

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