1. Optimum hysteretic damper design for multi-story timber structures represented by an improved pinching model
- Author
-
Liu Changcheng, Dai Fengyu, and Wuchuan Pu
- Subjects
021110 strategic, defence & security studies ,Hydrogeology ,business.industry ,Computer science ,Shear force ,0211 other engineering and technologies ,Bilinear interpolation ,020101 civil engineering ,02 engineering and technology ,Building and Construction ,Structural engineering ,Slip (materials science) ,Geotechnical Engineering and Engineering Geology ,Residual ,0201 civil engineering ,Damper ,Nonlinear system ,Geophysics ,Dissipative system ,business ,Civil and Structural Engineering - Abstract
Timber structures are characterized by a pinching phenomenon that leads to reduced dissipative capability. A few hysteretic models have been proposed to simulate the mechanical behavior of timber structures, among which the one composed of a bilinear element and a slip element in parallel has been popular in practice. Based on this model, this paper expands on the existing seismic control design methodology to determine the capacity of hysteretic dampers for multi-story timber structures. The equivalent linearization method for a single-degree-of-freedom timber structure with added hysteretic damper is established and is verified through nonlinear timber history analysis over a wide range of structural parameters. The design formulas for determining the damper capacity for a multi-degree-of-freedom system are derived, based on the concept of adjusting the distribution of equivalent stiffness of structure. The seismic control design is applied to many buildings with randomly generated parameters and the effectiveness is confirmed through a nonlinear time history analysis with four sets of seismic excitations. An extended study has shown that the shear force pattern plays an important role in the seismic control design results and thus the performance of structures. The effectiveness of the control of residual deformations by adding dampers is also studied.
- Published
- 2018