Fatigue Behavior Analysis Of The Composite Steel-Concrete Beam

Composite beams of steel and concrete are new type structures in which the steel and the concrete are integrated by connectors to take advantage of respective properties of tension and compression. In the past several years, the application of composite beams on high-rise building, industrial building, and bridge in oversea and in china are more and more prevail, especially on fly-over bridges in cities. And researchers are more interested in the fatigue of composite.There are four composite specimens in this paper. They are full composite using steel bars in the concrete slab (AF), 80% partial composite using steel bars (AP), full composite using wire meshes (BF), 80% partial composite using wire meshes (BP).The specimens are analyzed by the finite element analysis software ANSYS and MARC, when they are subjected to static loading. And we can receive their ultimate strength. Similarly, their fatigue lives are calculated by the software FATIGUE. And both the static and fatigue analysis results are compared to the test results of literature twenty-two. At last, this article introduces some computational methods and correlation conclusions in the literatures and the standards. After analysis, new proposal is put forward in this paper.After analysis,we can see that the ultimate strength of full composite and partial composite is similar under static loads. In certain circumstances, it can be partial composite rather than full composite. Correspondingly, the impact of lateral reinforcement ratio is greater. We can receive the same conclusion under fatigue loads. Evaluation of four components, we can conclude that the behavior of BF is the best, following are BP, AF and AP.