Analysis of Flexural Behavior of Steel-encased Concrete Composite Beams
新型外包钢-砼组合梁的受力性能分析

Aiming at some problems of common steel-concrete beams, this article puts forward a new type of composite beam-steel-encased composite beam. To study its mechanical character, three simple supported samples with full size were tested. The load-deflection curves, load-strain curves, and strain distribution along beam height were analyzed. From the results we can draw the conclusions that this kind of beam has good mechanical performance and application prospect. Based on elastic-plastic theory of composite beam, a formula for bearing capacity of normal section was derived. The theoretical results are in good agreement with the measurement ones. Finally, to facilitate its application in engineering, some suitable construction measures are brought forward according to the test results.