三維非線性玻璃纖維竹節筋握裹力之有限元素分析

Finite Element Analysis on 3D Nonlinear by Glass Fiber Reinforcement Plastics Bar and Behaviors of Bond

張巍霈(Wei-Pei Chang)

指導教授 ： 韓荗樹

國立臺北科技大學/工程學院/土木與防災研究所/碩士(2006年)

摘要

鋼筋腐蝕一直是傳統鋼筋混凝土的一個重要課題，尤其是在惡劣的腐蝕環境下，鋼筋鏽蝕會降低結構物的承載能力和壽命。加上淡水砂的取得越來越不易，將來使用海水砂的機會將大大提升，因此本研究以耐腐蝕性極佳的玻璃纖維竹節筋（FRP rebar）來代替鋼筋混凝土結構物中的鋼筋，探討不同的節高、節距、節寬對於纖維筋與混凝土之間握裹力的影響。
研究結果顯示，可證實實驗結果【林瀚洋，2003】，由實驗所求得纖維筋之基本材料性質，應用ANSYS－非線性有限元素套裝軟體，來模擬纖維筋及混凝土在不同節高、節距及節寬對握裹力的影響；並量測纖維筋受力端的軸向位移，建立拉拔力－位移圖，判斷何種情況的握裹力較佳；拉拔過程中應力集中在纖維筋卡楯部份，因此纖維筋的竹節是形成握裹力的主要因素；而節高越高、節距越大的纖維筋其握裹強度越強，而節寬對握裹強度則無太大影響。

關鍵字

纖維筋 ； 握裹力 ； ANSYS

並列摘要

The corrosion of steel reinforcing bars is always be a important problem in the Reinforced Concrete , especially when the RC structures are exposed to deteriorative environments , it could lead to corrosion of the reinforcing steel . The whole structure Might lose its loading capacity and reduce its service life , and the fresh water sand will decrease , it will be use the sea sand , so, this urges the researches of finding a substitute for steel rebar or invention of new corrosion prevention technology . The FRP ( fiber reinforced plastic) rebar with good corrosion resistance and high stiffness weight ratio will be a good candidate for this purpose , to produce different link high , link distance , link width , to confer the bond of FRP bar and concrete .
The results of the test can be verified from this analytic results , use the basic materials property of the FRP bar , to apply Ansys - the program of the nonlinearing finite element analysis . To simulate FRP bar and concrete in the bond of different link high , link distauce and link width , and cube the distance of embrace direction , to build up the bond-distance graph , could be determine what the situation the bond will be better , In the pull process , the stress focus on the link , so , the link is the important factor of the bond . With the link high more higher , and the link distance more bigger , then the bond stress will be strengther , but the link width has no influence on bond strength.

並列關鍵字

Glass Fiber Reinforcement ； Bond ； ANSYS

參考文獻

[6] Antonio Nanni, Masaharu Tanigaki, and Koichi Hasuo, “Bond Anchorage of Pretensioned FRP Tendon at Force Release,” Journal of Structural Engineering, Vol. 118, No. 10, October, 1992. Paper No. 2491. pp.2837-2854.

[2] ANSYS7.0，ANSYS Release 7.0 Documentation Preview，2003。

[5] ACI 440H 2000. Guide for the design and construction of concrete reinforced with FRP bars ,American Concrete Institute American Concrete Institute, Detroit, Mich., 97p.

[8] Bathe, K. J., Finite element procedures, Englewood Cliffs, Prentice-Hall, (1996).

[9] Castro, P.F., and Carino, N.J. 1998. Tension and non-destructive testing of FRP bars, Journal of Composite for Construction, ASCE, 2(1):17-27