玻璃纤维聚合物筋混凝土梁正截面承载力的计算

[12-11 16:59:52]   来源:http://www.tmgc8.com  工程技术   阅读:3506

  在梁设计中,梁的截面尺寸选定以后,玻璃纤维聚合物筋混凝土单筋矩形截面梁的a值可由式(18)得到:

Image742.gif (1058 bytes)

(32a)

式中:λ=2Mu 0.85f′cbd2;是强度折减系数。

玻璃纤维聚合物筋和钢筋混凝土矩形截面双筋梁的a值可由式(21)得到:

Image743.gif (1132 bytes)

(32b)

式中:λ4=2ρ′fy/0.85f′c(1-d′/d).

  最后,纵向玻璃纤维聚合物筋的截面面积Af可综合利用式(17)或式(20),并结合式(7)玻璃纤维聚合物筋的应力-应变关系以及截面应变条件得到。

 

 

 

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[2] Theriault M,Benmokrane B.Theoretical and experimental investigation on crack width,deflection and deformability of concrete beams reinforced with FRP rebars[C]。1997 Annual Conference,Canadian Society for Civil Engineering,1997.

[3] Theriault M,Benmokrane B.Effects of FRP reinforcement ratio and concrete strength on flexural behavior of concrete beams[J]。Journalof Composites for Construction,1998,2(1).

[4] Danying Gao,Benmokrane Brahim, Michele Theriault.Design method of concrete T beams reinforced with fiber reinforced polymer rebar[C]。Annual conference of the Canadian Society for Civil Engineering,Halifax, NovaScotia,Canada,June,1998.

[5] Tighiouart Brahim,Danying Gao, Benmokrane Brahim.Bondstrength of fiber reinforced plastic (FRP) bars embedded in concrete[C]。Second international conference on composites in infrastructure(ICC'97), Tucson,Arizona, U.S.A.,Jenuary,1998.


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