| Popis: |
Publisher Summary Plastic behavior refers to the tendency of an element to experience appreciable deformation at constant load, just like the flow of molten plastic. Plastic methods of analysis and design are suitable for materials that exhibit ductility. Mild steel is one such good candidate material for application of plastic theory. Although the material may be suitable for plastic application, certain member behavior may negate this characteristic. Of particular interest is an axially loaded element that may suddenly buckle sideways at a load much lower than what would be sufficient to cause plastic flow. This is the principal reason the axially loaded elements do not lend themselves very much to plastic analysis. Beam elements, on the other hand, are the most suitable for plastic theory application, because they are least prone to buckling instability. Various researchers suggest different methods of improving the plastic performance of axially compressed elements. This chapter presents a method to introduce plastic properties in otherwise brittle axially compressed steel members. In the method, the elements are loaded with an eccentricity to introduce moment. This greatly improves the plastic performance of the compression member. The chapter presents both theoretical and experimental results of eccentricity studies on tee-section steel members. It also points out possible practical applications of plasticity enhancement through eccentric loading of axially compressed members. |
