Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/15577
標題: 輕質自充填混凝土預力梁之剪力行為
Shear Behavior of Prestressed Beams with Lightweight Self-Consolidating Concrete
作者: 陳祈隆
Chen, Chi-Lung
關鍵字: lightweight concrete;輕質骨材;self-consolidating concrete;prestressed;shear;自充填;預力;剪力
出版社: 土木工程學系所
引用: 1.日本土木學會, “高性能混凝土施工指南, ”民國八十七年七月. 2.陳豪吉,”輕質骨材混凝土”,中華輕質骨材協會 3.陳胤成, “輕質骨材自充填混凝土之性質研究,” 碩士論文, 國立中興大學土木工程研究所, 民國九十三年六月. 4.ACI Committee 318, “Building Code Requirements for Structural Concrete (ACI 318-05) and Commentary (ACI 318R-05),” American Concrete Institute, Detroit , 2005, pp.263-290. 5.Elzanaty, Ashraf H. ; Nilson, Arthur H. ; and Slate, Floyd O. “Shear Capacity of Prestressed Concrete Beam Using High Strength Concrete” ACI Structural Journal , V.83, No.3, May-June.1986 , pp.319-368. 6.徐育邦,”高強度飛灰混凝土預力梁之剪力強度” 碩士論文, 國立中興大學土木工程研究所,民國八十二年六月 7.施永銅, “輕質骨材混凝土構件之行為” 碩士論文, 國立中興大學土木工程研究所民國八十三年六月. 8.林甫人 , “含鋼線網剪力筋預力梁之剪力行為” 碩士論文, 國立中興大學土木工程研究所, 民國八十四年六月. 9.林添益, “自充填高性能鋼筋混凝土梁剪力強度之測試與探討” 碩士論文, 國立交通大學土木工程研究所,民國九十一年六月. 10.SylvaⅢ,G. S. ; Breen,J. E.; and Burns, N. H., “Feasibility of Utilizing High-Performance Lightweight Concrete in Pretensioned Bridge Girders and Panels ,” Center for Transportaton Research, The University of Texas at Austin, Jan. 2002. 11.陳金剛, “自充填混凝土之力學行為” 碩士論文, 國立中興大學土木工程研究所,民國九十二年七月. 12.黃士庭, “鋼筋於自充填混凝土梁中之握裹行為,” 碩士論文, 國立中興大學土木工程研究所, 民國92年7月. 13.曲天強,”輕質骨材混凝土梁構件之承載行為” 碩士論文, 國立中央大學土木工程研究所,民國九十四年七月 14.林士平, “不同流動性混凝土之圍束行為,” 博士論文, 國立中興大學土木工程研究所, 民國九十四年七月 15.Kahn, Lawrence F. , and Lopez, Mauricio, “Prestress Losses in High- Performance Lightweight Concrete Pretensioned Bridge Girders,” PCI Structural Journal, V. 50, No.5, Sep.-Oct. 2005, pp. 84-94. 16.Lopez, Mauricio ; Kahn, Lawrence F. ; and Kurtis, Kimberly E., “Creep and Shrinkage of High-Performance Lightweight Concrete,” ACI Structural Journal, V. 101, No. 5, Sep.-Oct. 2004, pp. 391-400. 17.陳豪吉, “以台灣地區生產之輕質骨材探討輕質混凝土之配比製 作及強度性質,” 博士論文, 國立中興大學土木工程研究所, 民國八十七年五月. 18.陳鴻銓,”輕質自充填混凝土預力梁之撓曲行為” 碩士論文, 國立 中興大學土木工程研究所,民國九十五年七月 19.黃兆龍,”混凝土性質與行為”,詹氏書局,民國八十六年 20.Salandra , Miguel A. ,and Ahmad , Shuaid H., “Shear Capacity Of Reinforced Lightweight High Strength Concrete Beams” ACI Structural Journal, V.86, No.6 , November-December 1989, pp.679-704.
摘要: 
本研究主要在探討輕質自充填混凝土及普通混凝土預力梁之剪力行為,共製作20支預力梁試體以進行載重試驗。其中10支為輕質自充填混凝土預力梁,其中10支為普通混凝土預力梁,兩組不同骨材之混凝土各取1支作為長期觀測之用,藉以求得預力損失。試體採T型斷面,梁長4200 mm、梁翼寬400 mm、梁翼厚80 mm、梁高400 mm、梁腹寬200 mm,且所有梁皆設計為剪力破壞。試驗主要變數為混凝土強度、預力量、剪跨比及箍筋間距等。試驗結果可歸納如下:

1.本試驗中LSCC之預力損失為7.4%比NC之6.2%略大,其比值約為1.20 。
2.本試驗所得到之實際極限剪力強度均高於ACI-05規範建議式計算所得之數值,顯示規範對極限剪力強度之預測較為保守。並且LSCC試體之極限剪力強度(Vn)略低於NC試體,兩者剪力極限強度之比值約為0.93。
3.增加混凝土強度、增加預力量、減少剪跨比均對剪力開裂強度有提升之作用。但剪力筋間距對剪力開裂強度並沒有明顯之影響。
4.相同條件下LSCC之剪力開裂強度(Vcr)與NC相近,其比值約為1.03。
5.由圖型觀察LSCC裂縫控制上與NC差異不大,但在相同條件之下,梁試體裂縫寬度同為0.8 mm時LSCC試體所承受之載重較NC低,其比值約為NC試體之0.89。

This study focuses on the shear behavior of lightweight self-consolidating concrete and normal concrete prestressed beams. Twenty beam specimens were made in this investigation, 10 were lightweight self-consolidating concrete beams, and the other 10 were normal concrete beams. One specimen from NC and LSCC were taken for long-term observation. All of beams were designed for shear failure. The parameters included concrete strength, amount of prestress, shear span to depth ratio, and spacing of transverse reinforcement. The following conclusions can be made from the results.
1.Prestress losses of LSCC prestressed beams are slightly larger than normal one and its ratio is about 1.20 .
2.The results show that the real ultimate shear strengths are higher than those obtained by ACI-05 code , and Vn values of LSCC prestressed beams are slightly less than those of NC. Its average ratio is about 0.93 .
3.An increase of concrete strength, amount of prestress ,and decrease of shear span to depth ratio would improve Vcr . But there is no absolutely relationship between spacing of transverse reinforcement and Vcr .
4.With same variables, Vcr values of LSCC prestressed beams are close to greater than those of NC. Its average ratio is about 1.03 .
5.The crack control ability of LSCC prestressed beams is similar to that of NC. With same variables, the shear forces of LSCC specimens are smaller than those of NC when the crack width reaches 0.8 mm . Its average ratio is about 0.89 .
URI: http://hdl.handle.net/11455/15577
其他識別: U0005-2008200710471600
Appears in Collections:土木工程學系所

Show full item record
 

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.