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Seismic Retrofit of a Historic Pier Using Lead-Rubber Bearings
Ports 2013, 2013The San Diego Unified Port District decided to construct a new multi-use building on the historic Broadway Pier. The pier, built in 1913, would require a seismic upgrade to accommodate the new facility. Initial study findings indicated that seismic demand would cause failure of the existing batter pile to deck connections. Preliminary retrofit concepts
Jeff Kilborn +3 more
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Nonlinear Model-Based System Identification of Lead–Rubber Bearings
Journal of Structural Engineering, 2008A nonlinear model-based system identification method is proposed, formulated, implemented, and applied to a three-span continuous base-isolated bridge. Transverse and rotational rigid-body motions of the bridge superstructure are formulated into two degrees-of-freedom dynamic governing equations.
Il-Sang Ahn, Stuart S. Chen
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An equivalent linear model of lead-rubber seismic isolation bearings
Engineering Structures, 1996An equivalent linear model for the seismic analysis of base-isolated bridges with lead-rubber bearings (LRB) is established in this paper using an identification method. Recognizing that the inelastic displacement spectra with constant ductility ratios of an earthquake ground motion can be approximated by the equivalent elastic spectra with appropriate
J.S. Hwang, J.M. Chiou
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Evaluation of Long-Term Behavior by the Size of Lead Rubber Bearings
Volume 8: Seismic Engineering, 2016In the nuclear power plants (NPPs), the base isolators can be used to decrease the seismic force (acceleration, shear force, floor response spectra). During the lifetime of isolation systems, the mechanical properties of rubber bearings will be constantly changed by the vulcanization and degradation of the rubber due to environmental and
Junhee Park +2 more
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Multi-level SMA/lead rubber bearing isolation system for seismic protection of bridges
Smart materials and structures (Print), 2020In performance-based seismic design, bridges are expected to satisfy specific performance objectives under several levels of seismic hazard. In this paper, a multi-level SMA/lead rubber bearing (ML-SLRB) isolation system was proposed to ensure both ...
Sasa Cao +4 more
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Effects of Heating on the Behavior of Lead-Rubber Bearings. I: Theory
Journal of Structural Engineering, 2009The energy dissipated per cycle and the characteristic strength of lead-rubber bearings reduce with increasing number of cycles as a result of heating of the lead core. The reduction is substantial depending on the geometric characteristics of the bearing and the speed of motion. This paper presents a theory that is capable of predicting the dependency
Ioannis V. Kalpakidis +1 more
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Experimental Study on the Ultimate Limit State of a Lead-Rubber Bearing
Volume 8: Seismic Engineering, 2016Recently, a base isolation system used to be introduced for the seismic safety of nuclear power plants. The isolation system should keep its function over the design level earthquake with a high confidence like any other equipment in nuclear power plants.
Jung Han Kim, Min Kyu Kim, In-Kil Choi
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Development and Study of a Building Model on Lead Rubber Bearings
Vestnik MEI, 2022Vladimir Radin +3 more
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Optimum lead–rubber isolation bearings for near-fault motions
Engineering Structures, 2007Abstract Analytical seismic response of multi-storey buildings isolated by lead–rubber bearings (LRB) is investigated under near-fault motions. The superstructure is idealized as a linear shear type flexible building. The force–deformation behaviour of the LRB is modelled as bilinear with viscous damping.
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Nondestructive inspection of a lead rubber bearing using ultrasonic wave
SPIE Proceedings, 2006At first, two kinds of miniature LRB models are prepared, one model has normal lead damper, the other has abnormal one. And they are scanned by ultrasonic wave using ultrasonic transducers and AE sensors. The output signals obtained through the inside are different from each other. Infinite route is assumed as ultrasonic wave propagation line.
Yutaka Yoneda, Akira Mita
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