|Table of Contents|

Experiment on Crack of Thick-cover Reinforced Concrete Beams(PDF)

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

Issue:
2011年01期
Page:
53-57
Research Field:
Publishing date:
2011-03-20

Info

Title:
Experiment on Crack of Thick-cover Reinforced Concrete Beams
Author(s):
LI Zhi-hua1;  SU Xiao-zu2;  ZHAO Yong2
1. School of Civil Science and Engineering, Yangzhou University, Yangzhou 225127, Jiangsu, China; 2. School of Civil Engineering, Tongji University, Shanghai 200092, China
Keywords:
reinforced concrete beam;  thick-cover;  crack width;  static-loading experiment;  crack spacing
PACS:
TU375.1
DOI:
-
Abstract:
4 thick-cover concrete beams reinforced with 500 MPa steel bars were tested under two-point symmetrical concentrated static-loading to observe the details of crack development on these beams and investigate their cracking characteristics, meanwhile, combining the existing test data of 24 thick-cover reinforced concrete beams, the revised calculation formulas for crack spacing and crack width were suggested. Furthermore, based on the test results of the concrete beams with skin reinforcements or stirrups, the design recommendations were proposed for crack control of reinforced concrete beams with thick concrete cover. Analysis results show that the cracking behavior of the thick-cover concrete beams reinforced with 500 MPa steel bars is similar to that of the common reinforced concrete flexural members, but under the state of serviceability, the crack widths of these beams are usually larger and can't meet the demands of code. The calculated crack widths of thick-cover concrete beams using the formulas adopted in current Chinese Code for Design of Concrete Structures(GB 50010—2002)usually exceed the experiment crack widths.

References:

[1] GB 50010—2002,混凝土结构设计规范[S]. GB 50010—2002,Code for Design of Concrete Structures[S].
[2]SL/T 191—96,水工混凝土结构设计规范[S]. SL/T 191—96,Design Code for Hydraulic Concrete Structures[S].
[3]王清湘,赵顺波.大保护层钢筋混凝土受弯构件裂缝控制的试验研究[J].大连理工大学学报,1993,33(5):566-575. WANG Qing-xiang,ZHAO Shun-bo.Research on Crack Control of RC Beams with Large Concrete Cover[J].Journal of Dalian University of Technology,1993,33(5):566-575.
[4]童保全.大保护层钢筋混凝土受弯构件裂缝开展的试验研究[J].水运工程,1985(6):52-55. TONG Bao-quan.Research on Cracking Behavior of RC Beams with Large Concrete Cover[J].Port & Waterway Engineering,1985(6):52-55.
[5]HOGNESTAD E.High Strength Bars as Concrete Reinforcement,Part 2:Control of Flexural Cracking[J].Journal of the PCA Research and Development Laboratories,1962,4(1):46-63.
[6]KAAR P H,MATTOCK A H.High Strength Bars as Concrete Reinforcement,Part 4:Control of Cracking[J].Journal of the PCA Research and Development Laboratories,1963,5(1):15-38.
[7]CCES 01—2004,混凝土结构耐久性设计与施工指南[S]. CCES 01—2004,Guide to Durability Design and Construction of Concrete Structures[S].
[8]CLARK A P.Cracking in Reinforced Concrete Flexural Members[J].Journal of American Concrete Institute,1956,52(8):851-862.
[9]CHI M,KIRSTTEIN A F.Flexural Cracks in Reinforced Concrete Beams[J].Journal of American Concrete Institute,1958,54(4):865-878.
[10]顾祥林.混凝土结构基本原理[M].上海:同济大学出版社,2004. GU Xiang-lin.Basic Principles of Reinforced Concrete Structures[M].Shanghai:Tongji University Press,2004.
[11]丁大钧.钢筋混凝土构件抗裂度、裂缝和刚度[M].南京:南京工学院出版社,1986. Ding Da-jun.Resistance Cracking Moment,Crack and Stiffing Effect in Reinforced Concrete Members[M].Nanjing:Nanjing Institute of Technology Press,1986.
[12]苏小卒,李志华,赵 勇,等.配筋表层钢筋的混凝土梁裂缝和刚度试验探讨研究[J].建筑结构学报,2009,30(1):62-67. SU Xiao-zu,LI Zhi-hua,ZHAO Yong,et al.Experimental Research on Crack Width and Stiffness of Reinforced Concrete Beams with Skin Reinforcement[J].Journal of Building Structures,2009,30(1):62-67.
[13]EN 1992-1-1:2002,Eurocode 2:Design for Concrete Structures.Part 1-1:General Rules and Rules for Buildings[S].
[14]MAKHLOUF H M,MALHAS F A.The Effect of Thick Concrete Cover on the Maximum Flexural Crack Width Under Service Load[J].ACI Structural Journal,1996,93(3):257-265.

Memo

Memo:
-
Last Update: 2011-03-20