|本期目录/Table of Contents|

[1]吕志涛,潘钻峰.斜向开裂混凝土梁的瞬时及长期剪切变形[J].建筑科学与工程学报,2010,27(02):1-9.
　LU Zhi-tao,PAN Zuan-feng.Instantaneous and Long-term Shear Deformations of Inclined Crack Concrete Beams[J].Journal of Architecture and Civil Engineering,2010,27(02):1-9.
点击复制

斜向开裂混凝土梁的瞬时及长期剪切变形(PDF)
分享到：

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
27卷
期数:
2010年02期
页码:
1-9
栏目:
出版日期:
2010-06-20

文章信息/Info

Title:
Instantaneous and Long-term Shear Deformations of Inclined Crack Concrete Beams
作者:
吕志涛,潘钻峰
东南大学 混凝土及预应力混凝土结构教育部重点实验室,江苏 南京 210096
Author(s):
LU Zhi-tao, PAN Zuan-feng
Key Laboratory of Concrete and Prestressed Concrete Structure of Ministry of Education, Southeast University, Nanjing 210096, Jiangsu, China
关键词:
剪切变形;  斜裂缝;  变角桁架模型;  瞬时;  长期;  徐变;  收缩
Keywords:
shear deformation;  inclined crack;  variable truss model;  instantaneous;  long-term;  creep;  shrinkage
分类号:
TU375.1
DOI:
-
文献标志码:
A
摘要:
针对钢筋混凝土梁在斜裂缝出现之后剪切变形对结构挠度影响很大,且随着时间的推移影响不断增加的问题,开展了3根薄腹梁的抗剪性能试验,研究了斜裂缝出现之后,剪切变形对结构挠度的影响; 根据变角桁架模型,考虑混凝土收缩徐变影响,量化分析了斜裂缝出现后的瞬时剪切变形及长期剪切变形,并与试验结果进行了比较; 分析了影响剪切变形的参数,如混凝土强度、跨高比、剪跨比、配箍率和纵筋配筋率。结果表明:斜向开裂后混凝土梁的剪切变形对结构总变形影响较大; 梁的跨高比对剪切变形与弯曲变形比值影响最大。
Abstract:
The structural deflection due to shear deformation could be of the same order of magnitude as deflection due to bending after the formation of inclined cracks, and the impact of shear deformation on structural deflection might increase as time went on. For this reason, the experiments on the inclined cracks of three thin-webbed girders were carried out. Base on the experiments, the effect of shear deformation of thin-webbed girder on structural deflection was studied after the formation of inclined cracks. Also, the quantitative analysis of instantaneous and long-term shear deformation were performed using variable truss model, taking account of cracks, concrete shrinkage and creep. Parametric analysis of concrete strength, span-height ratio, shear span ratio, stirrup ratio and longitudinal reinforcement ratio were conducted to identify their effects on shear deformation. Results show that the effect of shear deformation of thin-webbed girder on structural long-term deflection is significant. The span-height ratio has an important impact on the shear deformation and bending deformation ratio.

参考文献/References:

[1] JTG D62—2004,公路钢筋混凝土及预应力混凝土桥涵设计规范[S]. JTG D62—2004,Code for Design of Highway Re-inforced Concrete and Prestressed Concrete Bridges and Culverts[S].
[2]GB 50010—2002,混凝土结构设计规范[S]. GB 50010—2002,Code for Design of Concrete Structures[S].
[3]TIMOSHENKO S.材料力学[M].萧敬勋,刘文秀,译.天津:天津科学技术出版社,1989. TIMOSHENKO S.Material Mechanics[M].Translated by XIAO Jing-xun,LIU Wen-xiu.Tianjin:Tianjin Science and Technology Press,1989.
[4]LEONHARDT F.钢筋混凝土结构裂缝与变形的验算[M].胡贤章,程积高,译.北京:水利电力出版社,1983. LEONHARDT F.Calculation of Crack and Deformation of Reinforced Concrete Structure[M].Translated by HU Xian-zhang,CHENG Ji-gao.Beijing:Water Conservancy and Electric Power Press,1983.
[5]ASCE-ACI Committee 445 on Shear and Torsion.Recent Approaches to Shear Design of Structural Concrete[J].Journal of Structural Engineering,1998,124(12):1375-1417.
[6]PARK R,PAULAY T.Reinforced Concrete Structures[M].New York:John Wiley & Sons,1975.
[7]PAULEY T.Coupling Beams of Reinforced Concrete Shear Walls[J].Journal of the Structure Division,1971,97(3):843-862.
[8]KIM J H,MANDER J B.Influence of Transverse Reinforcement on Elastic Shear Stiffness of Cracked Concrete Elements[J].Engineering Structures,2007,29(8):1798-1807.
[9]NIE J G,CAI C S.Deflection of Cracked RC Beams Under Sustained Loading[J].Journal of Structural Engineering,2000,126(6):708-716.
[10]孙志忠,袁慰平,闻震初.数值分析[M].2版.南京:东南大学出版社,2002. SUN Zhi-zhong,YUAN Wei-ping,WEN Zhen-chu.Numerical Analysis[M].2nd ed.Nanjing:Southeast University Press,2002.
[11]ACI 318-08,Building Code Requirements for Structural Concrete(ACI 318-08)and Commentary[S].
[12]陈肇元,朱金铨,吴佩刚.高强混凝土及其应用[M].北京:清华大学出版社,1992. CHEN Zhao-yuan,ZHU Jin-quan,WU Pei-gang.High-strength Concrete and Its Application[M].Beijing:Tsinghua University Press,1992.
[13]过镇海,时旭东.钢筋混凝土原理与分析[M].北京:清华大学出版社,1998. GUO Zhen-hai,SHI Xu-dong.Reinforced Concrete Theory and Analyse[M].Beijing:Tsinghua Univer-sity Press,1998.
[14]潘柏荣.高强混凝土梁抗剪性能试验研究[D].长沙:湖南大学,2009. PAN Bai-rong.Research on Shear Capacity of High Strength Concrete Beams[D].Changsha:Hunan University,2009.
[15]吕艳梅.高强箍筋高强混凝土梁抗剪性能试验研究与理论分析[D].长沙:湖南大学,2008. LU Yan-mei.Theoretical and Experimental Research on Shear Capacity of High Strength Concrete Beams with High Strength Stirrups[D].Changsha:Hunan University,2008.
[16]杨茂盛,王 乐.混凝土结构工程综合性能评价的技术方法分析[J].西安建筑科技大学学报:自然科学版,2007,39(2):263-266. YANG Mao-sheng,WANG Le.Method Analysis in Comprehensive Performance Evaluation of the Concrete Structure Engineering[J].Journal of Xi'an University of Architecture & Technology:Natural Science Edition,2007,39(2):263-266.
[17]贺拴海,李春风,吕 婷,等.钢筋混凝土系杆拱桥稳定性影响参数[J].长安大学学报:自然科学版,2008,28(4):43-46. HE Shuan-hai,LI Chun-feng,LU Ting,et al.Influ-encing Parameters of Stability for Reinforced Concrete Tied-arch Bridge[J].Journal of Chang'an University:Natural Science Edition,2008,28(4):43-46.

相似文献/References:

[1]肖建庄,朱永明,王璞瑾,等.再生混凝土U型叠合梁抗剪性能[J].建筑科学与工程学报,2012,29(02):1.
　XIAO Jian-zhuang,ZHU Yong-ming,WANG Pu-jin,et al.Shear Behavior of Recycled Concrete U-shaped Composite Beams[J].Journal of Architecture and Civil Engineering,2012,29(02):1.

备注/Memo

备注/Memo:
收稿日期:2010-05-07
基金项目:交通部科技攻关项目(20063180001)
作者简介:吕志涛(1937-),男,浙江新昌人,教授,博士研究生导师,中国工程院院士,E-mail:luzhitao@seu.edu.cn。
更新日期/Last Update: 2010-06-20