Fast modeling of lightweight glubam frame structures based on connection test information

Abstract

SummaryThe main lateral load‐carrying components of lightweight glued laminated bamboo (glubam) structures are shear walls. It is essential to understand lightweight glubam shear walls' performances to assess lightweight glubam structures' overall performance. A simplified numerical model was developed to predict the nonlinear response of lightweight glubam shear walls and structures. Based on the assumption that (1) the panel‐frame connectors govern the lateral resistance of the lightweight frame shear walls due to the high in‐plane shear stiffness and strength of the sheathing panel, (2) the out‐of‐plane bulking of the sheathing panel is avoided through the frame and the connections between them, and (3) the resistance capacity of the frame is negligible, the numerical model was developed based on the connection test information. Glubam nail connection tests were conducted considering different nail types and loading directions. The corresponding simplified hysteric wall model is composed of two kinds of input parameters. First are the parameters determining the wall's envelope curve under monotonic loading conditions, which regulate the hysteresis rules. The parameters related to the envelope curve are obtained through the modeling results of the nonlinear static analysis of the shear wall, whereas those related to the hysteresis rules are estimated through the connection test information. The influences of different nails, wall sizes, and openings on the walls' behavior are evaluated based on this simplified model. Based on the numerical simulation results of shear walls, the seismic performance of a glubam house was assessed.