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Simplified Elastic Calculation Method of Precast Rectangular Rib Floor Concrete Two-way Composite Slab with One Edge Clamped and Three Edges Simply Supported

HUANG Hai-lin;LI Jin-hua;ZENG Chui-jun;ZHU Ming-qiao;School of Civil Engineering,Hunan University of Science and Technology;  
Based on the mechanical property of precast rectangular rib floor concrete two-way composite slab(two-way composite slab),the existing problems in the practical engineering design were analyzed.According to the influence of the structural orthotropic characteristic of the two-way composite slab,the solutions of the deflection and bending moment of two-way composite slab with one edge clamped and three edges simply supported under uniformly distributed loads were solved by load superposition method and orthotropic plate theory.Through the form transformation of solutions and the introduction of equivalent span ratio,the two-way composite slab was calculated as equivalent isotropic two-way slab,and simplified elastic calculation method was presented.The elasticity coefficients of two-way slab composite were obtained by programming computation when the strong and weak directional stiffness ratios were0.5and 2.0and the equivalent span ratio was 0.5-1.0.The linear interpolation method was introduced to find the elastic coefficients of isotropic two-way slab according to the equivalent span ratio,and the results were compared with the programming calculation results.The resultsshows that the results obtained by simplified elastic calculation method are in good agreement with the programming calculation results. The simplified elastic calculation method can completely meet the engineering design requirements,and is accurate and feasible.
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