Method for performing stimulation test on stress of glass fiber reinforced plastic (GFRP) pipe steel reinforced high-strength concrete eccentric loading column

Abstract

The invention discloses a method for performing stimulation test on the stress of a glass fiber reinforced plastic (GFRP) pipe steel reinforced high-strength concrete eccentric loading column, and relates to a method for testing a building member. The method is characterized by comprising the steps of: analyzing the whole stress process under the action of an eccentric compressive load; establishing a bearing capacity calculation program of the GFRP pipe steel reinforced high-strength concrete eccentric loading column on the basis of a finite strip method with assumed plane sections; and calculating to obtain a load and deformation relation curve and a curve of the influence of the concrete strength, slenderness ratio, eccentricity and steel ratio on load-deformation by using the program, and performing test analysis. The test analysis shows that: the ultimate bearing capacity of a member is decreased along with the increase of the slenderness ratio, the elastic stage of a member curve is gradually shortened, and the rigidity is gradually lost; the ultimate bearing capacity of the member is decreased along with the increase of the eccentricity; the ductility of the member is improved; and the ultimate bearing capacity of the member is improved along with the improvement of the strength of concrete. In the method, a test analysis result and a test result are consistent, and a basis is provided for the actual design.

Description

Technical field [0001] The invention relates to a test method for building components, in particular to a GFRP pipe steel-reinforced high-strength concrete column force simulation test method. Background technique [0002] GFRP tube steel-reinforced high-strength concrete column is formed by embedding section steel in the wound GFRP tube, and then filling it with concrete to form a composite column. The composite column mainly restrains the concrete through the GFRP pipe, which forces the concrete to be in a three-way stress state, thereby achieving the purpose of improving the strength of the concrete. At the same time, the steel frame shares part of the axial force of the concrete, resulting in an increase in the bearing capacity of the composite column. The outer concrete prevents or alleviates the local buckling of the steel frame, which is a reasonable combined structure. In actual engineering, eccentricity may occur due to the uncertainty of the load position, the unevenne...

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