Abstract
A shear panel damper using low-yield steel is considered as one of cost-effective solutions to reduce earthquake damage to building structure. In this paper, we describe the development of a shear panel damper with high deformation capacity, which is a necessary condition for it to be a bridge bearing. The development is based on the measurement of strain distribution of the shear panels under cyclic loading test. For the measurement, an image processing technique is proposed to use with the two-dimensional finite element method, in which a constant stress triangular element is employed. The accuracy of the measurement is validated by comparing with the results acquired by strain gauges. Various shapes of shear panels are tested in the experiment to obtain the relationship between the strain distribution and the deformation capacity. Based on the results of the experiment, the shear panel damper is improved to achieve high seismic performance with large deformation capacity.
Highlights
Shear panel dampers (SPDs) made of low-yield steel have been widely studied and applied to high-rise buildings as hysteretic dampers globally
When shear panel dampers are installed into building structures, they are expected to partially divert the input seismic energy into the dampers and reduce the seismic response of the structures under strong earthquake loads effectively and economically and to improve the energy dissipation capacity of the buildings [1,2,3]
An application of SPD bearing is proposed for function separated bridge bearings system [5, 6], in which two separate bearings are designed according to each separated functional requirement
Summary
Shear panel dampers (SPDs) made of low-yield steel have been widely studied and applied to high-rise buildings as hysteretic dampers globally. A sliding bearing supports the vertical force including dead and live loads This separate bearings system is expected to overcome the disadvantage of high cost and low energy dissipation capacity of laminated rubber bearing, which is installed in bridge structures generally. We have focused on developing high seismic performance shear panel damper made of the super low-yield steel LY100 with the aim of applying them in bridge structures [7, 8]. The relationship between the shear load-displacement and the strain distribution in the panels is studied to identify the crack initiation mechanism in the shear panel dampers, which can lead to the development of a high seismic performance shear panel damper with large deformation capacity
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