Lei Xu

TL;DR: In this paper, a simple computer-based pushover analysis technique for performance-based design of building frameworks subject to earthquake loading is presented, where the standard elastic and geometric stiffness matrices for frame elements are progressively modified to account for nonlinear elastic-plastic behavior under constant gravity loads and incrementally increasing lateral loads.

TL;DR: In this article, a continuous-discrete optimization algorithm is applied to minimize the cost of the connections and members for the structure subject to constraints on stresses and displacements under specified design loads.

TL;DR: In this article, Liu et al. presented a progressive failure analysis procedure to evaluate the performance of a building framework after it has been damaged by unexpected abnormal loading, such as an impact or blast load caused by a natural, accidental, or deliberate event, or as a result of human error in design and construction.

TL;DR: In this article, the experimental results of a recent study carried out at the University of Waterloo on vibration characteristics of cold-formed steel-supported lightweight residential floor systems are presented. But the results of this study were limited to static and dynamic tests and on-site tests were also conducted to substantiate the results obtained in the laboratory tests and evaluate the actual vibration performance of the floor systems.

TL;DR: In this article, a multicriteria optimization method for the performance-based seismic design of steel building frameworks under (equivalent static) seismic loading is presented, where the overall objective for the design of a building framework is to have minimum structural weight and uniform plastic ductility demand while meeting displacement and strength constraints corresponding to the various performance levels.