|Table of Contents|

Instantaneous and Long-term Shear Deformations of Inclined Crack Concrete Beams(PDF)

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

Issue:
2010年02期
Page:
1-9
Research Field:
Publishing date:
2010-06-20

Info

Title:
Instantaneous and Long-term Shear Deformations of Inclined Crack Concrete Beams
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
Keywords:
shear deformation;  inclined crack;  variable truss model;  instantaneous;  long-term;  creep;  shrinkage
PACS:
TU375.1
DOI:
-
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.

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.

Memo

Memo:
-
Last Update: 2010-06-20