Study On Bending Capacity Of Original Bamboo-skeleton Lightweight Composite Floor Slab

The natural architecture movement with characteristics of non-industrial construction technology rises in the 21st-century residential design industry.Non-industrial construction technology used soil, wood, stone, fiber crops including bamboo and a large number of other relevant localization materials for building. Natural architecture should accord with the requirement of sustainable development, thus creating more healthy and comfortable living environment for human beings. At the same time, the investigation analysis results of damaged houses in 5.12 Wen Chuan earthquake showed that some concrete-frame buildings, concrete-frame columns and prestressed concrete truss plant globally collapsed during the earthquake; colorful composite steel plate or light roofing steel sheet plant could significantly reduced the seismic action, basically intact for lighter weight of roofing. Therefore, higher requirements are put forward on component weight in the seismic fortification district.The original bamboo-skeleton lightweight composite floor slab proposed in this paper can well meet the above requirements. This kind of new type of composite structure adopts bamboo as the main structural material, thus possessing the advantage of light deadweight, reducing the cost of building and construction waste. It can also improve the use value of bamboo timber at the same time, and to some certain extent replace the traditional structure material and enhance the degree of greening construction,significantly for realization of sustainable development of construction industry.(1) This paper experimentally studied the mechanical properties of bamboo, and tensile strength of bamboo along the line, tensile modulus of elasticity, shear strength and radial ring stiffness of round bamboo and bending strength of bamboo weredetermined. The effect of failure mechanism of different sample and slub on the mechanical properties of the bamboo were studied. Testing results showed that bamboo,natural green building material, had high mechanical strength and slub had relatively great influence on mechanical properties of the bamboo.(2) This paper discussed the bending performance testing of original bamboo-skeleton lightweight composite floor slab and the deflection of composite floor slab under various levels of load was measured. The damage processing, failure mode and failure mechanism of composite floor slab were discussed through observing development of the deflection of composite floor slab under various levels of load. The ultimate bearing capacity of the composite floor slab was obtained by considering the combined effect between bamboo and lightweight material and the curve of load-deflection of original bamboo-skeleton lightweight composite floor slab was gained Analysis results showed that original bamboo combined well with lightweight material, and the composite floor slab had favorable deformation ability and higher bearing capacity.(3) The mechanical property of testing model was studied by the finite element program ABAQUS and finite element analysis results agree well with the experimental results. It indicated the element type and meshing used in the modeling of ABAQUS in this article can be used for the calculation and analysis of original bamboo-skeleton lightweight composite structure. The influence of parameters such as the diameter of bamboo and number on the bearing capacity of slab was studied using the finite element software. The research results showed that increasing the bamboo diameter and number of bamboo could enhance bearing capacity of composite floor slab.