| This thesis generalizes the present development and the application of Steel Reinforced Concrete (SRC) Composite Structures at home and abroad, and gives a detailed statement of the research status, achievement , and the problems existed as to the bond property and the bond-slip construction.By virtue of the mechanism of bond-slip and related factors between reinforced bar and concrete in RC, based on the experimental results of the push-out, draw-out and beam specimens, the author here analyzes the mechanism of bond-slip and the related factors affecting the bond performance between steel shape and concrete in SRC to solve the problem on bond-anchoring design, the factors including: the intensity status of the concrete, the thickness of the protection, the horizontal stirrup ratio, the length of anchor-hold, the loading approach, the surface status, the casting method, etc.According to the sample cracking progress and the condition, the author gives an analysis the mechanics performance of concrete in the bond-slip layer, and makes clear the affecting factors.With OriginPro7.5, the author reaches the conclusion that a linearity description can be achieved of the bond average strength and load-end slip (Ï„ - Sl relations) at the loading phase as to 5 SRC samples [5]. Anew type of bond-slip constitutive relation model including two longitudinal position functions, F(x) and G(x), is established and expressed as formula Ï„(x) = {C1, ..., Ci. ,...,... Cn, F(x), G(x) }, in which the longitudinal difference of the bond-slip constitutive relations along the embedment is fully considered. Otherwise, the relation of the bond average strength and load-end slip at the loading phase is analyzed academically. The expected results have been achieved.At last, the analysis as to the constructive relation of the bond average strength and load-end slip at the decreasing state results in the conclusion: it can be described trinomially. |
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