Download or read book Analytical and Computational Modeling of Temperature-dependent Material Properties, Residual Stress, and Torsional Behavior for Cold-formed Steel Members written by Yu Xia (Ph.D.) and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thin-walled cold-formed steel (CFS) members have been widely used in the construction industry because of their unique advantages. A new family of CFS known as advanced high-strength steel (AHSS) has been developed with unprecedented combinations of strength and ductility. An extensive study of the material properties and member structural performance of AHSS is presented. The study consists of five different parts. The first three parts introduce the material properties of AHSS under different temperature scenarios including ambient, elevated temperatures, and subzero temperatures. Each of the three parts contains the experimental stress-strain curves and key material properties, as well as the developments of the constitutive relation modeling and the predictive equations for the parameters required by the proposed constitutive models. The fourth part introduces the residual stress distribution of press-braked AHSS members. An experimental study using the sectioning method is conducted for the residual stress measurement and a numerical study using a validated finite element model is presented to provide extra residual stress data through the steel sheet thickness. The fifth part introduces the torsional behaviors of CFS members. It contains two parametric studies using validated models. The first parametric study contains the predictive equations of bimoment capacity for members under torsional loads. The second parametric study contains the controlling interaction equations between moment and bimoment for members under combined bending-torsion with different bracing and loading conditions. The study shows the uniqueness of AHSS material and structural behaviors compared with conventional steel and provides useful data and information for potential AHSS applications in the construction industry in the future.