Lateral loading behavior of glulam frame-midply hybrid lateral systems

摘要

This paper presents the results of an experimental study on the lateral loading behavior of glulam framemidply hybrid lateral systems. Such systems are composed of glulam post-and-beam frames and infill midply shear walls. Reversed cyclic tests of six full-scale glulam frame-midply hybrid systems and two bare post-and-beam frames were conducted. The initial lateral stiffness, lateral load-carrying capacity, ductility and hysteresis characteristics of the hybrid systems were investigated. The load sharing mechanism between the outer frame and the infill midply subsystems was evaluated. Test results show that the installation of the infill midply shear walls can bring great improvements in the lateral resistance and the energy dissipation to the bare post-and-beam frames. The outer post-and-beam frames are basically in elastic range and can effectively restrain the infill midply shear walls from suffering further severe damages. For this reason, the post-peak lateral resistances of the hybrid systems can keep no less than 70% of their own load-carrying capacities within 4.41% drift ratio, and there is no need to install hold-down connectors in the infill midply shear walls. The load-carrying capacity of frame-midply hybrid lateral system is at least 1.5 times that of comparable frame infilled with standard wood-frame shear wall. (C) 2019 Elsevier Ltd. All rights reserved.