The Research On The Building Structure Of Bamboo

China has the world’s largest bamboo forest area and bamboo output, and is the richest country in bamboo resource. Sympodial bamboo accounted for more than20%of the area of bamboo forest, and it is one of the important ways to increase the added value that sympodial bamboo is processed into manufacture building structure.The main contents of this article are the building structures of bamboo, including the I-shaped structural beams of bamboo and the I-shaped structural columns of bamboo. By the bending test of the I-shaped structural beams of bamboo and the axis anti-pressure test of the I-shaped structural columns of bamboo in the early exploration, we can that some flaws and shortcomings about the materials and design were concluded. The performance of sheet metal mechanics is improved by changing the group billet way of bamboo plywood, and the internal strength of the structural components is improved by modifying structural components connected. The improved structural beams and structural columns were carried out the test of bending performance and the test of axis anti-pressure performance respectively, and the mechanical properties of the structural components is analyzed. Results show that:(1) In the bending process of the I-shaped structural beams of bamboo, the axis of symmetry of the deflection value in the middle and both sides are diminishing symmetrical distribution, the deflection value of hinged fulcrum position is essentially unchanged. The bamboo building structural beams major has two states in the bending process:elastic stage and plastic stage. The deformation of the web and flange is uncoordinated, so the stiffness and bearing capacity of the structural beams are affected.(2) In the axis anti-pressure process of the I-shaped structural columns of bamboo, the flange and web plates are bent to one side, and the rebound phenomenon appears in the loading stage. The central bend degree of the flange and web plates is maximum, and the bend degree of hinged fulcrum position is minimum. The I-shaped structural columns of bamboo lose the bearing capacity because of the local compression failure of the flange plate. The I-shaped structural columns of bamboo have the higher whole lateral stability, the smaller axial compression, and the better compression quality. (3) In the optimization test of sheet, the slab is divided into upper, middle, lower structure, the longitudinal bamboo are in the upper and lower layers, and the horizontal bamboo is in the middle layer. The parameter is the middle bamboo proportion. The article selects70%of the middle horizontal bamboo curtain as a web plate, and30%of the middle horizontal bamboo curtain as a flange plate, and the connection method is switched screw connection to bolted connection. The mechanical properties are improved and the integrity of structural components are increased. The structural beam failure load is94kN and125kN up to154kN.The failure load of the structural columns is700kN and880kN in initial exploration up to1141.91kN.(4) In the optimizing test, the pure bending MOE of the I-shaped structural beams of bamboo is2995.511MPa. The apparent flexural MOE is2868.296MPa. The bending strength is between34.335MPa.The equivalent MOE is2377.983MPa. The critical stress is44.848MPa.