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Analysis of Interface Slip Effect of Double Steel-Concrete Composite Beam

Author: ShaoXiaoHui
Tutor: DuanShuJin；WangJunWen
School: Shijiazhuang Railway Institute
Course: Bridge and Tunnel Engineering
Keywords: Double-sided steel - concrete composite beams Negative Moment Area Slippage Shrink
CLC: TU398.9
Type: Master's thesis
Year: 2008
Downloads: 33
Quote: 0
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Abstract


Traditional single-sided steel - concrete composite continuous beam in working condition , negative moment area of ??concrete tensile cracking , leading to reduced stiffness of the beam . This mechanical behavior is contrary to the concept of combination , is not conducive to the promotion and application of continuous composite beams . Steel - concrete composite beam flanges constructed of reinforced concrete slab set in the traditional single-sided composite continuous beam within bearing negative moment area , provides an effective way to solve this problem . Such negative bending region of the compressive stress to a certain extent to be borne by the lower concrete , reducing the burden of the steel beam , improve the beam stiffness and bearing capacity . The basic mechanics slip effect of steel - concrete composite beams . Derived under uniform load negative moment area under the interface slip along the beam length distribution of expression through numerical examples that the slip characteristics of steel - Concrete Composite Beam with traditional single-sided composite beams . 3 Steel - Concrete Composite Continuous Beam Model static load test, further analysis of the slip effect of the double - sided composite beams . The use of general-purpose software ANSYS finite element model of the test beam , nonlinear analysis of the double-sided composite continuous beams slip effect , also established the corresponding single-sided and double-sided composite beam combination of continuous beam model , the two by the results were compared . The concrete and steel beam deformation caused by the contraction member might have some impact , this paper derived combination withstand negative moment steel - concrete the duplex composite beams by steel beams and concrete shrinkage deformation difference sectional curvature expressions. This study allows us to have some understanding of the slip characteristics of steel - concrete composite beams , favor the further development of the research work .

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