The Axial Pressure Performance Study Of T New Ribbed Steel Reinforced Concrete Special-shaped Columns

In modern architecture,we use more square(rectangle),circular structure of concrete filled steel tube column,lead to post it outstand the wall and indoor layout is not flexible enough,not pretty.The T section concrete-filled steel tube column structure can avoid side column exposure,increasing the use of space,but the T section steel tube on core concrete of concrete filled steel tubular column constraint functions are mainly concentrated in the corner,in the central steel tube to core concrete constraint is very weak,almost zero,to give full play to its strength,steel need in central pole position setting steel pipe coated with constrained convex deformation effect of stiffener.Consideration of various parameters on the influence of the T section concrete-filled steel tube column,and to consider the convenience of engineering construction,so how to determine the optimal way of ribbed is what we have to consider the problem.T section concrete-filled steel tube column has good development prospect in engineering practice,so it is necessary to different ways of ribbed T section of concrete filled steel tube columns axial pressure performance and its working mechanism is studied.In this paper,the axial compression tests of T steel tube concrete columns with different reinforcement methods are carried out,and then the finite element software ABAQUS is used to calculate all the specimens,all specimens from steel tube failure pattern,the steel tube wall stress,the interaction force between the steel tube and core concrete,this paper compares and analyzes the comprehensive consideration of factors such as construction,material cost,improve the bearing capacity,it is concluded that the optimal T steel tube concrete ribbed means,and on this basis,the influence T parameters for simulation analysis of the bearing capacity of concrete filled steel tubular column and puts forward T under different ways of ribbed steel tube concrete bearing capacity calculation method.The main work is as follows:1.Refer to relevant research literature at home and abroad,identified in this paper,we study T new ribbed steel reinforced concrete special-shaped columns axial pressure learning performance research of the theory analysis and experiment scheme.2.Changes in different modes of ribbed as the main parameter,design the five different ways of ribbed t-shaped steel pipe concrete specimen,the design of 2 T without rib steel pipe concrete specimen,the experimental research under axial load,the main research: the damage form of specimens,steel pipe stress,the relationship between the load and strain curve.3.Through the finite element software ABAQUS to specimens under axial compression calculation,at the same time from the specimen failure mode,steel pipe wall stress,the interaction force between the steel tube and core concrete were analyzed;Calculation results are in good agreement with those obtained with the test results,using the finite element method to calculate more reliable.4.Using finite element software ABAQUS to influence without ribs T parameters in finite element analysis of the bearing capacity of concrete-filled steel tube column is calculated without ribs T simplified calculation formula of bearing capacity of concrete-filled steel tube column on the basis of the rib and considering constraint effect,put forward different ribbed T bearing capacity of concrete-filled steel tube column simplified calculation formula.