Publication
Displacement-dependent nonlinear damping model in steel buildings with bolted joints
Publisher:
SAGE Publications
Date:
08-10-2201
DOI:
10.1177/1369433218804321
Abstract: The stick–slip phenomenon is commonly found at structural connections in steel buildings. It is a major d ing mechanism in a structure with bolted joints and makes a significant contribution to the total structural d ing. This article reviews the stick–slip d ing model of an elastic single-degree-of-freedom system with one stick–slip component. It is observed that the d ing ratios of the system with the stick–slip mechanism first quickly increase when experiencing a very small displacement and then slowly decrease. After the number of activated slip surfaces is assumed to be a linear function related to the structural displacement, the equivalent d ing ratios of a structural system with numerous stick–slip components are derived. However, this displacement-dependent d ing model is very difficult to be used for a structural dynamic analysis due to its inherent complexity. Therefore, a new displacement-dependent d ing model for a structural dynamic analysis is proposed based on the viscous d ing. A high-rise steel moment resisting frame with bolted joints subjected to an earthquake ground motion is taken as an ex le to verify the proposed method.