Experimental Study On Compression Bearing Behavior Of SRRC Column With Different Steel Rate

With the rapid development of construction industry, the city has more and more of theconstruction waste, environmental pollution and because not only are not effectively recycling,waste a lot of natural resources. So the appearance of recycled concrete effectively relieve thepresent situation, has done a lot of research at home and abroad, related research shows that【1-5】the appropriate ratio, will be recycled concrete application in engineering practice is feasible,also appeared a lot of use of recycled concrete engineering example. But for the steel andconcrete and steel with renewable form of recycled concrete component mechanics test studyalso very few, and no payments of recycled concrete component system concept, in order toresearch the steel regeneration the mechanical properties of the concrete members, this topicthrough the:1、Establishing the regeneration of concrete and steel synergy of experimental mechanicsmodel, based on the existing conditions of the reasonable calculation mixture ratio, making a tomeet the requirements of recycled concrete column steel.2、Based on the materials, cross section shape and various factors affecting the status ofstudy and evaluation, and on the basis of loading conditions in the laboratory, were considereddifferent such as the steel ratio and eccentricity, of recycled concrete steel column cracking oftime, the development of the crack damage phenomenon observed, component analysis.3、According to the experimental data, the steel structure column recycled concreteanalysis of the bearing capacity of steel reinforced concrete column the ductility of theregeneration, stiffness, and stress and strain relations, and other data analysis and theoryresearch.4、Consider different such as the steel ratio, the selection of the eccentricity of the columnand value of recycled concrete steel column, the effects of the original concrete and steelcolumn do comparative analysis. Through the research result discuss and puts forward thereasonable steel bearing capacity calculation formula of recycled concrete column.Draw the following conclusion:1、For the first time, puts forward the concept of recycled concrete structure steel, steelreinforced concrete structures in regeneration properties of bearing pressure with the testphenomenon and ordinary steel reinforced concrete structures similar.2、Along with the increase of such as the steel ratio, the bearing capacity of the concretestructural steel regeneration increase; In such as the steel ratio under the same, with the increaseof eccentricity, steel concrete members with the bearing capacity of the regeneration is reduced, reduction of apparent, and concrete and steel slippage between with eccentricity and increase inearly.3、Sections regeneration concrete column (SRRC) N-M curve and ordinary concretecolumn similar, such as the steel ratio of recycled concrete column steel small envelopecontaining in the steel ratio of recycled concrete column big steel within envelope, and whetherthe axial compression or bias, including the pillars of the big steel ratio than contain steel ratethe pillars of the small bearing, good stiffness, bending capacity is good. Little eccentric,bending specimens of axial load ability with the increase and decrease, big eccentric, bendingspecimens of axial load bearing capacity with instead increases while; Boundaries destroy,reach a maximum bending specimens of bearing capacity.4、Refer to the related standards, this paper puts forward the reasonable based on steelrecycled concrete strength reduction of bearing capacity calculation formula.