Research On Bearing Capacity Calculation Of Concrete-Fille Rectangular Tube

In this thesis,author analyze the result of research of Concrete-filled rectangulartubular(CFRT)structure according to the experience provided by domestic and foreigncountry and analyze the calculation theory of four kind of Concrete-filled rectangulartubular(CFRT) carrying capacity stressly such as:the method of circle Hoopcalculation;the method of unity calculation;the method of similar steel calculation,themethod of superposition calcuation.The thesis pay more attention on notions andtheoretical foundation of simple superposition calcuation.;and then with the referenceto the domestic and foreign code and regulation,a formular is made.It does very wellon precision and practicality. In this thesis,author adopt a series of related result of experiment tested by otherexperts and combine with the VS and TD's research and related data of Supersonicflaw detecting test to conclude that: there exist the gap under the exterior forcesbetween steel and concrete and even cause totally apart;the gap and the scope of apartdepend on the force ,joint style and thickness of steel..Though the research oftheory,we voice the qulity status and characters of small and middle diameters ofCFRT;though Supersonic flaw detecting test,we voice the feasibility of no damage ofCFRT ,compared with rectangular tubular's parameter.and though incision test,wefind the location of damages according to different parameter such asvelocity ,frequency and the style of curve and then research it directly.Finally,it testthe accuracy of Supersonic flaw detecting. It test the accuracy of method of superposition calcuation through Supersonicflaw detecting and incision test. superposition calcuation possess followingmerits:clear concept,simple calculation,clear physics concept and feasibility ofpractise of design work.