Experimental Research On Regional Confined High-strength Concrete Short Columns Under Axial Load

Regional confined high-strength concrete is a new trial and development of theory and application of confined concrete. Its research is benefit to enrich concrete theory and widen concrete application scope, will be able to have the positive social and the economic efficiency. Because regional confined is one kind of new theory, we should understand its mechanics performance when apply it in the actual project. Compares to ordinary confined concrete, no matter whether strength or displacement, regional confined concrete all has a bigger difference, cannot apply the mechanics performance of confined concrete on regional confined concrete. Therefore, we need research the mechanics performance of regional confined concrete and setup the constitutive relationship of regional confined concrete. Nowadays, in concrete structural design standard of our country, the index of both strength and distortion performance of concrete is taken in the test result under single axle pressure and tension, which pulls as the foundation. Although this constitutive relationship is very simple, but is same with the component design calculation method, may satisfy the general engineering design request. This article studies the relationship of stress -strain of regional confined concrete under the single axle press. We have carried on a series of experiments according to needs of research ,carried on the comparison from the different confined intensity to regional confined concrete short columns and ordinary confined concrete short columns, analyzed capacity, ductility and each constituent function and so on, presented the relationship of stress - strain of regional confined concrete, thus comprehensively confirmed accuracy of the theoretical analysis, provided the theory basis for regional confined concrete application.