Composite Two-way Slab Study Of Experimental And Theoretical Analysis Of Delfection

Composite two-way slab is composed of precast and cast part in the interfacecombine to form part of Composite two-way slab, the bottom plate is generally madeup of two or more blocks of prefabricated panels stitched together, that it played a rolein the template pouring the concrete floor, and is form part of the floor, combines theadvantages of pre-cast panels and boards in one, with production speed, subject toweather conditions restricting the advantages of small, save labor and improve thequality of construction.Composite two-way slab reinforcement design in China at thisstage, due to the lack of theoretical and experimental studies of domestic support, theactual design designers generally adopt a method to increase the reinforcement plate toensure the safety board, this design method is relatively conservative, there may resultin a waste of resources, improved bi-directional composite panels cost, to promote theuse of composite structure difficult.In this thesis, the results of the measured data"Composite two-way slab force performance test" as the basis, focusing on analysis oftwo overlapping panels-two two-way fight laminated composite plates and three-milebi-directional variation in plate deflection under uniform load and bi-cast panels andgeneral comparative analysis of the two studies the differences that exist in thedeflection plates in order to solve this stage in the design of composite panels existsome questions, this article mainly from the following aspects of the study ofcomposite bi-directional board.Experimental research, in this trial as an ordinary castbidirectional control panel, under uniform loads, in order to fight deflection variationof two overlapping panels and three-mile two-way bi-directional composite panelswith a focus in the elastic stage, elastic-plastic and plastic-stage phase load-deflectioncurves with various stages of ordinary cast bi-plate load-deflection curves wereanalyzed. Test proved: two double-laminated board fight by force performance interms of deflection is consistent with ordinary cast bi-board; overlapping three-milebi-directional deflection plates in the elastic and elastic-plastic stage plate deflectionand ordinary cast bi large difference after entering the plastic stage tends to beconsistent with the ordinary cast bi-directional deflection plates. Theoretical researchon the theory, according to the test data obtained, compared to the elastic sheetdeflection theory derived formulas derived to analyze the differences between the two; After entering laminate with crack session to discuss the short-term at this stagestiffness and deflection calculations.(1)Analysis of the elastic phase. Using theclassical theory of elasticity in the thin edges simply supported boundary conditions ofordinary cast bi-plate deflection analysis, ordinary cast bi-directional deflection platesin elastic stage formula. For bi-directional composite panels, due to the presencepatchwork reduced stiffness plate deflection test results contrast ordinary cast calculatethe theoretical value of two-way slab formula derived in elastic deflection stage,analyze the differences between the two and calculates the theoretical formula tocalculate the elastic stage of deflection, and the results and laminate test data wereanalyzed.(2)Short-term stiffness and deflection calculations after analyzing cracks.Since two-way plate in vertical uniform stiffness under short-term loads calculationmore difficult, so this board is divided by a two-way strip to calculate the deflection ofbi-board and laminated board and the results were analyzed experimental data.Figure [59] table[9] reference[52]...