The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform
José I. Restrepo - One of the best experts on this subject based on the ideXlab platform.
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Shake Table Testing of an Elevator System in a Full-Scale Five-Story Building.
Earthquake Engineering & Structural Dynamics, 2016Co-Authors: Xiang Wang, Tara C Hutchinson, Rodrigo Astroza, Joel P. Conte, José I. Restrepo, Matthew S. Hoehler, Waldir RibeiroAbstract:Summary This paper investigates the seismic performance of a functional traction elevator as part of a full-scale five-Story Building shake table test program. The test Building was subjected to a suite of earthquake input motions of increasing intensity, first while the Building was isolated at its base and subsequently while it was fixed to the shake table platen. In addition, low-amplitude white noise base excitation tests were conducted while the elevator system was placed in three different configurations, namely, by varying the vertical location of its cabin and counterweight, to study the acceleration amplifications of the elevator components due to dynamic excitations. During the earthquake tests, detailed observation of the physical damage and operability of the elevator as well as its measured response are reported. Although the cabin and counterweight sustained large accelerations because of impact during these tests, the use of well-restrained guide shoes demonstrated its effectiveness in preventing the cabin and counterweight from derailment during high-intensity earthquake shaking. However, differential displacements induced by the Building imposed undesirable distortion of the elevator components and their surrounding support structure, which caused damage and inoperability of the elevator doors. It is recommended that these aspects be explicitly considered in elevator seismic design. Copyright © 2016 John Wiley & Sons, Ltd.
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dynamic characteristics and seismic behavior of prefabricated steel stairs in a full scale five Story Building shake table test program
Earthquake Engineering & Structural Dynamics, 2015Co-Authors: Xiang Wang, Tara C Hutchinson, Rodrigo Astroza, Joel P. Conte, José I. RestrepoAbstract:Summary This paper investigates the dynamic characteristics and seismic behavior of prefabricated steel stairs in a full-scale five-Story Building shake table test program. The test Building was subjected to a suite of earthquake input motions and low-amplitude white noise base excitations first, while the Building was isolated at its base, and subsequently while it was fixed to the shake table platen. This paper presents the modal characteristics of the stairs identified using the data recorded from white noise base excitation tests as well as the physical and measured responses of the stairs from the earthquake tests. The observed damage to the stairs is categorized into three distinct damage states and is correlated with the interStory drift demands of the Building. These shake table tests highlight the seismic vulnerability of modern designed stair systems and in particular identifies as a key research need the importance of improving the deformability of flight-to-Building connections. Copyright © 2015 John Wiley & Sons, Ltd.
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shake table test of a full scale 7 Story Building slice phase i rectangular wall
Journal of Structural Engineering-asce, 2011Co-Authors: Joel P. Conte, José I. Restrepo, Marios PanagiotouAbstract:This paper is a companion to "Displacement-Based Method of Analysis for Regular Reinforced-Concrete Wall Buildings: Application to a Full-Scale 7-Story Building Slice Tested at UC-San Diego" and presents key results obtained from a full-scale 7-Story reinforced concrete Building slice built and tested on the George E. Brown Jr. Network for Earthquake Engineering Simulation Large Outdoor High-Performance Shake Table at the University of California, San Diego. The Building was tested in two phases. This paper discusses the main test results obtained during Phase I of the experimental program. In this phase, the Building had a rectangular load-bearing wall acting as the main lateral force-resisting element. The Building was subjected to four historical California input ground motions, including the strong- intensity near-fault Sylmar record, which induced significant nonlinear response. The test addressed the dynamic response of the Building, including the interaction between the walls, the slabs, and the gravity system as well as four issues relevant to construction optimization: (1) reduction in the longitudinal reinforcement; (2) use of a single curtain of reinforcement to transfer shear; (3) constrain of plasticity in the first level of the wall using capacity design; and (4) use of resistance-welded reinforcement in the boundary elements of the first level of the walls. The Building responded very satisfactorily to the ground motions reproduced by the shake table and met all performance objectives. The effects of kinematic system overstrength and higher modes of response in the experimental response were important; this verified to a large extent the displacement-based method of analysis presented in the companion paper. DOI: 10.1061/(ASCE)ST.1943-541X.0000332. © 2011 American Society of Civil Engineers. CE Database subject headings: Walls; Displacement; Lateral forces; Earthquakes; Shake table tests; Concrete structures; Multi-Story Buildings.
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Performance of Suspended Pipes and Their Anchorages During Shake Table Testing of a Seven-Story Building
Earthquake Spectra, 2009Co-Authors: Matthew S. Hoehler, José I. Restrepo, Marios Panagiotou, John F. Silva, Lucas Floriani, Ulrich Bourgund, Helmut GassnerAbstract:Abstract This paper presents results of shake table tests on pipe systems anchored in a full-scale, seven-Story Building performed on the Large High-Performance Outdoor Shake Table at the University of California at San Diego on 1 May 2006. The purpose of the tests was to investigate the forces that act on post-installed anchors in Buildings during a diverse range of earthquake ground motions. A sound understanding of the force levels and number of cycles is important for developing reliable anchor qualification approaches and seismic design guidelines. The tests also provide data on floor accelerations and acceleration amplification for nonstructural components in Buildings during seismic events.
Joel P. Conte - One of the best experts on this subject based on the ideXlab platform.
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Shake Table Testing of an Elevator System in a Full-Scale Five-Story Building.
Earthquake Engineering & Structural Dynamics, 2016Co-Authors: Xiang Wang, Tara C Hutchinson, Rodrigo Astroza, Joel P. Conte, José I. Restrepo, Matthew S. Hoehler, Waldir RibeiroAbstract:Summary This paper investigates the seismic performance of a functional traction elevator as part of a full-scale five-Story Building shake table test program. The test Building was subjected to a suite of earthquake input motions of increasing intensity, first while the Building was isolated at its base and subsequently while it was fixed to the shake table platen. In addition, low-amplitude white noise base excitation tests were conducted while the elevator system was placed in three different configurations, namely, by varying the vertical location of its cabin and counterweight, to study the acceleration amplifications of the elevator components due to dynamic excitations. During the earthquake tests, detailed observation of the physical damage and operability of the elevator as well as its measured response are reported. Although the cabin and counterweight sustained large accelerations because of impact during these tests, the use of well-restrained guide shoes demonstrated its effectiveness in preventing the cabin and counterweight from derailment during high-intensity earthquake shaking. However, differential displacements induced by the Building imposed undesirable distortion of the elevator components and their surrounding support structure, which caused damage and inoperability of the elevator doors. It is recommended that these aspects be explicitly considered in elevator seismic design. Copyright © 2016 John Wiley & Sons, Ltd.
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dynamic characteristics and seismic behavior of prefabricated steel stairs in a full scale five Story Building shake table test program
Earthquake Engineering & Structural Dynamics, 2015Co-Authors: Xiang Wang, Tara C Hutchinson, Rodrigo Astroza, Joel P. Conte, José I. RestrepoAbstract:Summary This paper investigates the dynamic characteristics and seismic behavior of prefabricated steel stairs in a full-scale five-Story Building shake table test program. The test Building was subjected to a suite of earthquake input motions and low-amplitude white noise base excitations first, while the Building was isolated at its base, and subsequently while it was fixed to the shake table platen. This paper presents the modal characteristics of the stairs identified using the data recorded from white noise base excitation tests as well as the physical and measured responses of the stairs from the earthquake tests. The observed damage to the stairs is categorized into three distinct damage states and is correlated with the interStory drift demands of the Building. These shake table tests highlight the seismic vulnerability of modern designed stair systems and in particular identifies as a key research need the importance of improving the deformability of flight-to-Building connections. Copyright © 2015 John Wiley & Sons, Ltd.
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shake table test of a full scale 7 Story Building slice phase i rectangular wall
Journal of Structural Engineering-asce, 2011Co-Authors: Joel P. Conte, José I. Restrepo, Marios PanagiotouAbstract:This paper is a companion to "Displacement-Based Method of Analysis for Regular Reinforced-Concrete Wall Buildings: Application to a Full-Scale 7-Story Building Slice Tested at UC-San Diego" and presents key results obtained from a full-scale 7-Story reinforced concrete Building slice built and tested on the George E. Brown Jr. Network for Earthquake Engineering Simulation Large Outdoor High-Performance Shake Table at the University of California, San Diego. The Building was tested in two phases. This paper discusses the main test results obtained during Phase I of the experimental program. In this phase, the Building had a rectangular load-bearing wall acting as the main lateral force-resisting element. The Building was subjected to four historical California input ground motions, including the strong- intensity near-fault Sylmar record, which induced significant nonlinear response. The test addressed the dynamic response of the Building, including the interaction between the walls, the slabs, and the gravity system as well as four issues relevant to construction optimization: (1) reduction in the longitudinal reinforcement; (2) use of a single curtain of reinforcement to transfer shear; (3) constrain of plasticity in the first level of the wall using capacity design; and (4) use of resistance-welded reinforcement in the boundary elements of the first level of the walls. The Building responded very satisfactorily to the ground motions reproduced by the shake table and met all performance objectives. The effects of kinematic system overstrength and higher modes of response in the experimental response were important; this verified to a large extent the displacement-based method of analysis presented in the companion paper. DOI: 10.1061/(ASCE)ST.1943-541X.0000332. © 2011 American Society of Civil Engineers. CE Database subject headings: Walls; Displacement; Lateral forces; Earthquakes; Shake table tests; Concrete structures; Multi-Story Buildings.
Xiang Wang - One of the best experts on this subject based on the ideXlab platform.
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Shake Table Testing of an Elevator System in a Full-Scale Five-Story Building.
Earthquake Engineering & Structural Dynamics, 2016Co-Authors: Xiang Wang, Tara C Hutchinson, Rodrigo Astroza, Joel P. Conte, José I. Restrepo, Matthew S. Hoehler, Waldir RibeiroAbstract:Summary This paper investigates the seismic performance of a functional traction elevator as part of a full-scale five-Story Building shake table test program. The test Building was subjected to a suite of earthquake input motions of increasing intensity, first while the Building was isolated at its base and subsequently while it was fixed to the shake table platen. In addition, low-amplitude white noise base excitation tests were conducted while the elevator system was placed in three different configurations, namely, by varying the vertical location of its cabin and counterweight, to study the acceleration amplifications of the elevator components due to dynamic excitations. During the earthquake tests, detailed observation of the physical damage and operability of the elevator as well as its measured response are reported. Although the cabin and counterweight sustained large accelerations because of impact during these tests, the use of well-restrained guide shoes demonstrated its effectiveness in preventing the cabin and counterweight from derailment during high-intensity earthquake shaking. However, differential displacements induced by the Building imposed undesirable distortion of the elevator components and their surrounding support structure, which caused damage and inoperability of the elevator doors. It is recommended that these aspects be explicitly considered in elevator seismic design. Copyright © 2016 John Wiley & Sons, Ltd.
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dynamic characteristics and seismic behavior of prefabricated steel stairs in a full scale five Story Building shake table test program
Earthquake Engineering & Structural Dynamics, 2015Co-Authors: Xiang Wang, Tara C Hutchinson, Rodrigo Astroza, Joel P. Conte, José I. RestrepoAbstract:Summary This paper investigates the dynamic characteristics and seismic behavior of prefabricated steel stairs in a full-scale five-Story Building shake table test program. The test Building was subjected to a suite of earthquake input motions and low-amplitude white noise base excitations first, while the Building was isolated at its base, and subsequently while it was fixed to the shake table platen. This paper presents the modal characteristics of the stairs identified using the data recorded from white noise base excitation tests as well as the physical and measured responses of the stairs from the earthquake tests. The observed damage to the stairs is categorized into three distinct damage states and is correlated with the interStory drift demands of the Building. These shake table tests highlight the seismic vulnerability of modern designed stair systems and in particular identifies as a key research need the importance of improving the deformability of flight-to-Building connections. Copyright © 2015 John Wiley & Sons, Ltd.
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shake table testing of a full scale five Story Building performance of the major nonstructural components egress and facades
Structures Congress 2013: Bridging Your Passion with Your Profession, 2013Co-Authors: Elide Pantoli, Tara C Hutchinson, Xiang Wang, M Chen, Brian J Meacham, Haejun ParkAbstract:A full-scale, five-Story Building was constructed on the NEES\x+UCSD large, high-performance shake table and subjected to a series of earthquake motions while supported at its base in two different configurations. The Building was completely furnished with nonstructural components and systems (NCSs) including: a functioning passenger elevator, prefabricated stairs, facades, partition walls, piping, HVAC, ceiling, sprinklers, Building contents, as well as passive and active fire systems. The program included testing the Building in a base-isolated configuration -- prior to testing it fixed at its base -- with earthquakes of increasing severity imposed on the Building in both configurations. In this paper, the performance of two major NCSs is of primary interest, namely the egress subsystems (elevator and stairs) and facades (balloon framing overlaid by stucco and precast concrete cladding). Physical observations and measured seismic response of these subsystems and the associated impact on post-earthquake fire performance are presented.
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Shake Table Testing and Numerical Simulation of Raised Access Floor - Computer Rack Systems in a Full-Scale Five-Story Building
Structures Congress 2012, 2012Co-Authors: Xiang Wang, Tara C HutchinsonAbstract:A full-scale, 5-Story Building was designed and constructed on the NEES-UCSD shake table. The Building is outfitted with a wide range of common nonstructural components and systems (NCSs). Amongst these are two large computer servers donated by industry, with one supported on a raised access floor and the other conventionally anchored to the floor slab. In this paper we present the scope of the broader test program, an overview of its Building structural design and numerical modeling, and relevant to this session, pre-test numerical simulation of the access floor - computer rack system. Pending the test schedule, preliminary test results for the computer rack - access floor system may be presented at the conference.
Rodrigo Astroza - One of the best experts on this subject based on the ideXlab platform.
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Shake Table Testing of an Elevator System in a Full-Scale Five-Story Building.
Earthquake Engineering & Structural Dynamics, 2016Co-Authors: Xiang Wang, Tara C Hutchinson, Rodrigo Astroza, Joel P. Conte, José I. Restrepo, Matthew S. Hoehler, Waldir RibeiroAbstract:Summary This paper investigates the seismic performance of a functional traction elevator as part of a full-scale five-Story Building shake table test program. The test Building was subjected to a suite of earthquake input motions of increasing intensity, first while the Building was isolated at its base and subsequently while it was fixed to the shake table platen. In addition, low-amplitude white noise base excitation tests were conducted while the elevator system was placed in three different configurations, namely, by varying the vertical location of its cabin and counterweight, to study the acceleration amplifications of the elevator components due to dynamic excitations. During the earthquake tests, detailed observation of the physical damage and operability of the elevator as well as its measured response are reported. Although the cabin and counterweight sustained large accelerations because of impact during these tests, the use of well-restrained guide shoes demonstrated its effectiveness in preventing the cabin and counterweight from derailment during high-intensity earthquake shaking. However, differential displacements induced by the Building imposed undesirable distortion of the elevator components and their surrounding support structure, which caused damage and inoperability of the elevator doors. It is recommended that these aspects be explicitly considered in elevator seismic design. Copyright © 2016 John Wiley & Sons, Ltd.
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dynamic characteristics and seismic behavior of prefabricated steel stairs in a full scale five Story Building shake table test program
Earthquake Engineering & Structural Dynamics, 2015Co-Authors: Xiang Wang, Tara C Hutchinson, Rodrigo Astroza, Joel P. Conte, José I. RestrepoAbstract:Summary This paper investigates the dynamic characteristics and seismic behavior of prefabricated steel stairs in a full-scale five-Story Building shake table test program. The test Building was subjected to a suite of earthquake input motions and low-amplitude white noise base excitations first, while the Building was isolated at its base, and subsequently while it was fixed to the shake table platen. This paper presents the modal characteristics of the stairs identified using the data recorded from white noise base excitation tests as well as the physical and measured responses of the stairs from the earthquake tests. The observed damage to the stairs is categorized into three distinct damage states and is correlated with the interStory drift demands of the Building. These shake table tests highlight the seismic vulnerability of modern designed stair systems and in particular identifies as a key research need the importance of improving the deformability of flight-to-Building connections. Copyright © 2015 John Wiley & Sons, Ltd.
Marios Panagiotou - One of the best experts on this subject based on the ideXlab platform.
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shake table test of a full scale 7 Story Building slice phase i rectangular wall
Journal of Structural Engineering-asce, 2011Co-Authors: Joel P. Conte, José I. Restrepo, Marios PanagiotouAbstract:This paper is a companion to "Displacement-Based Method of Analysis for Regular Reinforced-Concrete Wall Buildings: Application to a Full-Scale 7-Story Building Slice Tested at UC-San Diego" and presents key results obtained from a full-scale 7-Story reinforced concrete Building slice built and tested on the George E. Brown Jr. Network for Earthquake Engineering Simulation Large Outdoor High-Performance Shake Table at the University of California, San Diego. The Building was tested in two phases. This paper discusses the main test results obtained during Phase I of the experimental program. In this phase, the Building had a rectangular load-bearing wall acting as the main lateral force-resisting element. The Building was subjected to four historical California input ground motions, including the strong- intensity near-fault Sylmar record, which induced significant nonlinear response. The test addressed the dynamic response of the Building, including the interaction between the walls, the slabs, and the gravity system as well as four issues relevant to construction optimization: (1) reduction in the longitudinal reinforcement; (2) use of a single curtain of reinforcement to transfer shear; (3) constrain of plasticity in the first level of the wall using capacity design; and (4) use of resistance-welded reinforcement in the boundary elements of the first level of the walls. The Building responded very satisfactorily to the ground motions reproduced by the shake table and met all performance objectives. The effects of kinematic system overstrength and higher modes of response in the experimental response were important; this verified to a large extent the displacement-based method of analysis presented in the companion paper. DOI: 10.1061/(ASCE)ST.1943-541X.0000332. © 2011 American Society of Civil Engineers. CE Database subject headings: Walls; Displacement; Lateral forces; Earthquakes; Shake table tests; Concrete structures; Multi-Story Buildings.
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Performance of Suspended Pipes and Their Anchorages During Shake Table Testing of a Seven-Story Building
Earthquake Spectra, 2009Co-Authors: Matthew S. Hoehler, José I. Restrepo, Marios Panagiotou, John F. Silva, Lucas Floriani, Ulrich Bourgund, Helmut GassnerAbstract:Abstract This paper presents results of shake table tests on pipe systems anchored in a full-scale, seven-Story Building performed on the Large High-Performance Outdoor Shake Table at the University of California at San Diego on 1 May 2006. The purpose of the tests was to investigate the forces that act on post-installed anchors in Buildings during a diverse range of earthquake ground motions. A sound understanding of the force levels and number of cycles is important for developing reliable anchor qualification approaches and seismic design guidelines. The tests also provide data on floor accelerations and acceleration amplification for nonstructural components in Buildings during seismic events.
