LONG-TERM DEFLECTION OF HIGH-STRENGTH LIGHTWEIGHT AGGREGATE CONCRETE BEAMS

Sun Hai-lin; Ye Lie-ping; Guo Yu-shun; Ding Jian-tong

doi:10.13204/j.gyjz200606024

Volume 36 Issue 6

Dec. 2014

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2006 > 36(6): 88-91,113

Liu Chengcai, Song Rongfang. THE EXPERIMENTAL STUDY ON THE STRUCTURAL PERFORMANCE OF THE PRESTRESSED CONCRETE CONTINUOUS LAMINATED HOLLOW SLABS[J]. INDUSTRIAL CONSTRUCTION, 2012, 42(6): 38-40. doi: 10.13204/j.gyjz201206010

Citation:

Sun Hai-lin, Ye Lie-ping, Guo Yu-shun, Ding Jian-tong. LONG-TERM DEFLECTION OF HIGH-STRENGTH LIGHTWEIGHT AGGREGATE CONCRETE BEAMS[J]. INDUSTRIAL CONSTRUCTION, 2006, 36(6): 88-91,113. doi: 10.13204/j.gyjz200606024

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LONG-TERM DEFLECTION OF HIGH-STRENGTH LIGHTWEIGHT AGGREGATE CONCRETE BEAMS

doi: 10.13204/j.gyjz200606024

1.
1. Department of Civil Engineering,Tsinghua University Beijing 100084;
2.
2. Nanjing Hydraulic Research Institute Nanjing 210029

Received Date: 2006-02-16
Publish Date: 2006-06-20

Abstract

Abstract

Three high-strength lightweight aggregate concrete (LWAC) beams were experimented for long-term deflections,which lasted for nearly 1 year, with the average 28-day compressive strength 601 8MPa and 6414MPa. From the test results it is observed that long-term deflections developed quickly at early ages and reinforcement ratio for compression steel had a significant effect on time-dependent deflections. Finite element methods had been developed to account for time-dependent deflections of reinforced concrete members and a good agreement was achieved. It isfound that ACI318 and ACI435methodshad resulted in good estimates for the time-dependent deformation and the design methods of current Chinese codes may be unsafe.
- high-strength lightweight aggregate concrete,
- long-term deflection,
- shrinkage,
- creep,
- finite element method

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References(11)

References

[2] Reichard T W.Creep and Drying Shrinkage of Lightweight and NormalWeight Concretes.NBS Monograph 74,U.S.Department of Commerce,1964

Best C H,Polivka M.Creep of Lightweight Concrete.Magazine of Concrete Research,1959,11 (33):129-134

[3] Stevens R F.Deflection of Reinforced Concrete Beams.The Institution of Civil Engineers,Proceedings Part 2,1972(53):207-224

[4] 刚度裂缝专题组.钢筋轻骨料混凝土受弯构件刚度的试验研究.建筑结构,1983(1):16-21

[5] 丁大钧.钢筋混凝土构件抗烈度裂缝和刚度.南京:南京工学院出版社,1986

[6] CEB-FIP.CEB-FIP Model Code 1990.London:1991

[7] JTG D62-2004 公路钢筋混凝土及预应力混凝土桥涵设计规范

[8] ACI Committee 318.Building Code Requirements for Reinforced Concrete.American Concrete Institute,1989

[9] ACI Committee 435.Control of Deflection in Concrete Structures.American Concrete Institute,1995

[10] 轻骨料混凝土桥梁技术规程(报批稿).北京:中国建筑科学研究院,2002

[11] GB 50010-2002 混凝土结构设计规范

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