Mechanical Properties Of Concrete Steel Flange And Corrugated Web I-beams

I-girder with corrugated web is a new type of structural element. Owing to its ownfeatures, this kind of girder is widely used. In this paper, a new kind of girder which iscomposed of concrete-filled tubular flange and corrugated webs is presented.Concentrated loads are subjected to the mid-span of the specimens, and four I-girders withdifferent section shapes are tested. The experimental phenomena and results of thespecimens are obtained and analyzed. The main work of this paper includes the followingaspects:(1) Four I-girder tests have been carried out, and the process information andexperimental data are first summarized, and the mechanical behaviors and failure modesof specimens with different cross sections are then obtained and evaluated. It turns out that,for the traditional I-girder, the stability of the web can be improved effectively by usingcorrugated web, so the buckling strength of the flat web is increased. As compressionflange, the concrete filled steel tube can enhance the global stability. In addition, theultimate strengths of the specimens are calculated using the theoretical formulas.Comparing the bearing capacity of the concrete-filled tubular flange girder withcorrugated web to the conventional girder with flat web, the advantages of the bearingcapacity and the stability of the new kind of girder over the conventional I-girders areobviously provided.(2) The finite element models of these four specimens are made using finite element(FE) software ANSYS, the FE results are compared with the test results. The FE resultsagree well with the experimental results. Though the comparison of the failure modes andload-displacement/rotation curves, the accuracy of the FE models are verified, thisbecomes the basis of the later parametric analysis.(3) The parametric analysis of corrugated webs and the concrete-filled rectangulartubular are both performed to study the effect on ultimate strength and failure mode ofgirders. The parameters concerned consist of material strength, the corrugations anddimensions of the web, the span-depth ratio and so on. The results show that the bearing capacity can be improved by increasing the strength of the material or designing thecorrugation of the web rationally. For long span girder with corrugated web, its globalstability can be improved using concrete filled steel tube as the compression flange, so itsultimate strength can be increased.