A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Thermal-Mechanical Coupled Behavior of Sliding Bearings for Seismic Isolation
Abstract In this paper, the authors focus on the thermal-mechanical coupled behavior of sliding bearings for seismic isolation. Sliding bearings are seismic isolation components which allow designers to develop longer-period isolation systems for structures. In Japan, long-period, long-duration ground motions have been of great concern since the 2011 Tohoku earthquake, when ground motions lasting more than five minutes were observed across a wide area. Such motions might induce numerous cyclic deformations in seismic isolation bearings. High-friction sliding bearings absorb seismic input energy and convert it to heat energy. Therefore, a large number of cyclic deformations might cause the performance of the sliding bearings to deteriorate due to an increase in the contact surface temperature of the sliding material and steel plates. The authors developed a numerical analysis model to account this thermal-mechanical coupled behavior of sliding bearings. The model combines thermal conductivity and seismic response analyses. The thermal and mechanical analytical procedures were both performed interactively by updating their parameters incrementally at each time step. Simulation of horizontal, two-dimensional cyclic loading tests of a scaled sliding bearing confirmed the validity of the model. Seismic response analyses using the model were conducted to evaluate the behavior of a seismically isolated building equipped with sliding bearings. The authors concluded that the thermal-mechanical coupled behavior should be considered in order to accurately predict the response of an isolated building with sliding bearings under long-duration ground motions.
Thermal-Mechanical Coupled Behavior of Sliding Bearings for Seismic Isolation
Abstract In this paper, the authors focus on the thermal-mechanical coupled behavior of sliding bearings for seismic isolation. Sliding bearings are seismic isolation components which allow designers to develop longer-period isolation systems for structures. In Japan, long-period, long-duration ground motions have been of great concern since the 2011 Tohoku earthquake, when ground motions lasting more than five minutes were observed across a wide area. Such motions might induce numerous cyclic deformations in seismic isolation bearings. High-friction sliding bearings absorb seismic input energy and convert it to heat energy. Therefore, a large number of cyclic deformations might cause the performance of the sliding bearings to deteriorate due to an increase in the contact surface temperature of the sliding material and steel plates. The authors developed a numerical analysis model to account this thermal-mechanical coupled behavior of sliding bearings. The model combines thermal conductivity and seismic response analyses. The thermal and mechanical analytical procedures were both performed interactively by updating their parameters incrementally at each time step. Simulation of horizontal, two-dimensional cyclic loading tests of a scaled sliding bearing confirmed the validity of the model. Seismic response analyses using the model were conducted to evaluate the behavior of a seismically isolated building equipped with sliding bearings. The authors concluded that the thermal-mechanical coupled behavior should be considered in order to accurately predict the response of an isolated building with sliding bearings under long-duration ground motions.
Thermal-Mechanical Coupled Behavior of Sliding Bearings for Seismic Isolation
Kikuchi, Masaru (author) / Ishii, Ken (author)
2018-08-26
14 pages
Article/Chapter (Book)
Electronic Resource
English
Seismic isolation of bridges using isolation systems based on flat sliding bearings
| British Library Online Contents | 2007
Spherical sliding isolation bearings with adaptive behavior: Theory
| Online Contents | 2008
| British Library Conference Proceedings | 2003
Numerical Assessment of Frictional Heating in Sliding Bearings for Seismic Isolation
| Online Contents | 2014