Aspects of Isolation Device Behavior Observed from Full-Scale Testing of an Isolated Building at E-Defense

Ryan, Keri L.; Dao, Nhan D.; Sato, Eiji; Sasaki, Tomohiro; Okazaki, Taichiro

doi:10.1061/9780784412374.003

Cited by 15 publications

(19 citation statements)

References 3 publications

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“…The applied ground motions are summarized in Ryan et al (2012). Due to the flexibility of the decks, the vertical acceleration was generally amplified in the middle of the decks compared to the column locations.…”

Section: Resultsmentioning

confidence: 99%

Seismic Response of Ceiling/Sprinkler Piping Nonstructural Systems in NEES TIPS/NEES Nonstructural/NIED Collaborative Tests on a Full Scale 5-Story Building

Soroushian

Ryan

Maragakis

et al. 2012

Structures Congress 2012

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Nonstructural systems constitute a significant portion of the total property of a typical building. Recent earthquakes have repeatedly demonstrated that nonstructural damage results in significant loss of property and function with major catastrophic impact on communities. In a collaborative project between the NSF NEES program and the National Research Institute for Earth Science and Disaster Prevention of Japan, a full-scale, five-story steel moment frame building was subjected to a number of 2D and 3D ground motions using the E-Defense shake table. The building was tested under three different configurations: 1) base isolated with triple pendulum bearings (TPB), 2) base isolated with a combination of lead-rubber bearings and cross linear bearings (LRB/CLB), and 3) base fixed. As part of a NEESR-GC project on the "Simulation of the Seismic Performance of Nonstructural Systems," more than 75 m 2 (800 sq-ft) of suspended ceiling with lay-in tiles and 3 sprinkler branch lines were installed on the 4th and 5th floors of the building. The ceiling was enclosed by light gauge stud gypsum partition walls. This paper presents some of the preliminary observations on the response of nonstructural systems from these experiments.

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Section: Resultsmentioning

confidence: 99%

Seismic Response of Ceiling/Sprinkler Piping Nonstructural Systems in NEES TIPS/NEES Nonstructural/NIED Collaborative Tests on a Full Scale 5-Story Building

Soroushian

Ryan

Maragakis

et al. 2012

Structures Congress 2012

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“…The significant influence of vertical excitation was a dominant outcome of the NEES/E-Defense test program [48]. Input table excitations with peak vertical accelerations greater than about 0.5g resulted in some damage to suspended ceilings, causing ceiling panels to fall, or in the most extreme cases localized failures of the ceiling grid support system.…”

Section: Experimental Demonstrationmentioning

confidence: 99%

“…The second of these test programs, a NEES/E-Defense collaboration, evaluated the response of a 5-story steel moment frame building isolated with (1) 9 triple pendulum bearings (TPBs); and (2) 4 lead-rubber bearings (LRBs) paired with 5 cross linear bearings (CLBs). The results of the NEES/E-Defense collaboration have been reported only preliminarily to date [48].…”

Section: Experimental Demonstrationmentioning

confidence: 99%

“…The TP bearing, consisting of four spherical sliding surfaces and three independent pendulum mechanisms, offers the most adaptable behavior of the multi-spherical sliding bearings [41][42][43]. A photograph of a TP bearing used in the NEES TIPS/E-Defense tests [48] is shown in Figure 5a with a cross-section view in Figure 5b. The internal pendulum mechanism with two concave plates and a rigid slider, denoted collectively as the "articulated slider" (Figure 5b), determines the response during low intensity shaking.…”

Section: Lateral Displacement Articulated Slider Sliding Interfacementioning

confidence: 99%

“…The friction coefficient in the cross-linear bearing is minimized by use of linear guides with recirculating ball technology. Shake table verification of this technology was a component of recent tests performed at E-Defense [48], that are described below.…”

Section: Experimental Demonstrationmentioning

confidence: 99%

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A Review of Seismic Isolation for Buildings: Historical Development and Research Needs

2012

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Seismic isolation is a technique that has been used around the world to protect building structures, nonstructural components and content from the damaging effects of earthquake ground shaking. This paper summarizes current practices, describes widely used seismic isolation hardware, chronicles the history and development of modern seismic isolation through shake table testing of isolated buildings, and reviews past efforts to achieve three-dimensional seismic isolation. The review of current practices and past research are synthesized with recent developments from full-scale shake table testing to highlight areas where research is needed to achieve full seismic damage protection of buildings. The emphasis of this paper is on the application of passive seismic isolation for buildings primarily as practiced in the United States, though systems used in other countries will be discussed.

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Seismic response of 20‐story base‐isolated and fixed‐base reinforced concrete structural wall buildings at a near‐fault site

Calugaru

Panagiotou

2013

Earthq Engng Struct Dyn

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SUMMARY This paper investigates numerically the seismic response of six seismically base‐isolated (BI) 20‐story reinforced concrete buildings and compares their response to that of a fixed‐base (FB) building with a similar structural system above ground. Located in Berkeley, California, 2 km from the Hayward fault, the buildings are designed with a core wall that provides most of the lateral force resistance above ground. For the BI buildings, the following are investigated: two isolation systems (both implemented below a three‐story basement), isolation periods equal to 4, 5, and 6 s, and two levels of flexural strength of the wall. The first isolation system combines tension‐resistant friction pendulum bearings and nonlinear fluid viscous dampers (NFVDs); the second combines low‐friction tension‐resistant crosslinear bearings, lead‐rubber bearings, and NFVDs. The designs of all buildings satisfy ASCE 7‐10 requirements, except that one component of horizontal excitation, is used in the 2D nonlinear response history analysis. Analysis is performed for a set of ground motions scaled to the design earthquake and to the maximum considered earthquake (MCE). At both the design earthquake and the MCE, the FB building develops large inelastic deformations and shear forces in the wall and large floor accelerations. At the MCE, four of the BI buildings experience nominally elastic response of the wall, with floor accelerations and shear forces being 0.25 to 0.55 times those experienced by the FB building. The response of the FB and four of the BI buildings to four unscaled historical pulse‐like near‐fault ground motions is also studied. Copyright © 2013 John Wiley & Sons, Ltd.

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Aspects of Isolation Device Behavior Observed from Full-Scale Testing of an Isolated Building at E-Defense

Cited by 15 publications

References 3 publications

Seismic Response of Ceiling/Sprinkler Piping Nonstructural Systems in NEES TIPS/NEES Nonstructural/NIED Collaborative Tests on a Full Scale 5-Story Building

Seismic Response of Ceiling/Sprinkler Piping Nonstructural Systems in NEES TIPS/NEES Nonstructural/NIED Collaborative Tests on a Full Scale 5-Story Building

A Review of Seismic Isolation for Buildings: Historical Development and Research Needs

Seismic response of 20‐story base‐isolated and fixed‐base reinforced concrete structural wall buildings at a near‐fault site

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