Generation of floor accelerations for seismic testing of operational and functional building components

2004 ◽  
Vol 31 (4) ◽  
pp. 646-663 ◽  
Author(s):  
Andre Filiatrault ◽  
Robert Tremblay ◽  
Steven Kuan
Keyword(s):  
Epicentral Distance ◽  
Ground Motions ◽  
Time History ◽  
Shake Table ◽  
Free Standing ◽  
Eastern Canada ◽  
Shake Table Testing ◽  
Building Models ◽  
Dynamic Analyses ◽  
Functional Components

The main objective of this paper is to establish floor accelerations to be used for shake table testing of operational and functional components that are sensitive mainly to horizontal accelerations. For this purpose, two different ensembles of floor accelerations were generated from nonlinear time–history dynamic analyses of three- and six-storey building models incorporating ductile reinforced concrete cantilevered walls. The first ensemble was generated based on synthetic ground motions representative of the intraplate regions of eastern Canada, and the second ensemble was generated from synthetic ground motions representative of the crustal and subcrustal earthquakes of western Canada. The ground motions were selected based on the deaggregations of the seismic hazard for each region in terms of most likely magnitude – epicentral distance scenarios. The building models were designed in accordance with the current seismic provisions of the National Building Code of Canada applicable for each region. Application of the resulting floor accelerations in shake table testing of free-standing bookcases and interior partition walls is reported in a companion paper.Key words: floor accelerations, ground motions, nonlinear dynamic analyses, nonstructural, operational and functional components.

Duration of nuclear explosion ground motion

1978 ◽  
Vol 68 (4) ◽  
pp. 1133-1145
Author(s):  
Walter W. Hays ◽  
Kenneth W. King ◽  
Robert B. Park
Keyword(s):  
Epicentral Distance ◽  
Ground Motions ◽  
Broad Band ◽  
Time History ◽  
Ground Acceleration ◽  
Ground Shaking ◽  
Distance Range ◽  
Nuclear Explosions ◽  
Dependent Site ◽  
Strong Ground

abstract This paper evaluates the duration of strong ground shaking that results from nuclear explosions and identifies some of the problems associated with its determination. Knowledge of the duration of horizontal ground shaking is important out to epicentral distances of about 44 km and 135 km, the approximate distances at which the ground shaking level falls to 0.01 g for nuclear explosions having yields of about 100 kt and 1,000 kt, respectively. Evaluation of the strong ground motions recorded from the event STRAIT (ML = 5.6) on a linear array of five, broad-band velocity seismographs deployed in the distance range 3.2 to 19.5 km provides information about the characteristics of the duration of ground shaking. The STRAIT data show that: (1) the definition that is used for defining duration is very important; (2) the duration of ground acceleration, as defined in terms of 90 per cent of the integral of the squared time history (Trifunac and Brady, 1975), increased from about 4 to 26 sec over the approximately 20-km distance range; and (3) the duration of ground velocity and displacement were slightly greater because of the effect of the alluvium layer on the propagating surface waves. Data from other events (e.g., MILROW, CANNIKIN, HANDLEY, PURSE) augment the STRAIT data and show that: (1) duration of shaking is increased by frequency-dependent site effects and (2) duration of shaking, as defined by the integral of the squared time history, does not increase as rapidly with increase in yield as is indicated by other definitions of duration that are stated in terms of an amplitude threshold (e.g., bracketed duration, response envelopes). The available data suggest that the duration of ground acceleration, based on the integral definition, varies from about 4 to 40 sec for a 100-kt range explosion and from about 4 to 105 sec for a megaton range explosion in the epicentral distance range of 0 to 44 km and 0 to 135 km, respectively.

Shake Table Testing of Slender RC Shear Walls Subjected to Eastern North America Seismic Ground Motions

2012 ◽  
Vol 138 (12) ◽  
pp. 1515-1529 ◽  
Author(s):  
Iman Ghorbanirenani ◽  
Robert Tremblay ◽  
Pierre Léger ◽  
Martin Leclerc
Keyword(s):  
North America ◽  
Ground Motions ◽  
Shear Walls ◽  
Eastern North America ◽  
Shake Table ◽  
Shake Table Testing

scholarly journals Seismic Evaluation of a Multitower Connected Building by Using Three Software Programs with Experimental Verification

2016 ◽  
Vol 2016 ◽  
pp. 1-18 ◽  
Author(s):  
Deyuan Zhou ◽  
Changtuan Guo ◽  
Xiaohan Wu ◽  
Bo Zhang
Keyword(s):  
Complex Structure ◽  
Time History ◽  
Hybrid Structure ◽  
Shake Table ◽  
Analysis Model ◽  
Seismic Evaluation ◽  
Shake Table Testing ◽  
Concrete Core ◽  
Core Tube ◽  
Function Modules

Shanghai International Design Center (SHIDC) is a hybrid structure of steel frame and reinforced concrete core tube (SF-RCC). It is a building of unequal height two-tower system and the story lateral stiffness of two towers is different, which may result in the torsion effect. To fully evaluate structural behaviors of SHIDC under earthquakes, NosaCAD, ABAQUS, and Perform-3D, which are widely applied for nonlinear structure analysis, were used to perform elastoplastic time history analyses. Numerical results were compared with those of shake table testing. NosaCAD has function modules for transforming the nonlinear analysis model to Perform-3D and ABAQUS. These models were used in ABAQUS or Perform-3D directly. With the model transformation, seismic performances of SHIDC were fully investigated. Analyses have shown that the maximum interstory drift can satisfy the limits specified in Chinese code and the failure sequence of structural members was reasonable. It meant that the earthquake input energy can be well dissipated. The structure keeps in an undamaged state under frequent earthquakes and it does not collapse under rare earthquakes; therefore, the seismic design target is satisfied. The integrated use of multisoftware with the validation of shake table testing provides confidence for a safe design of such a complex structure.

Shake table testing of bookcase – partition wall systems

2004 ◽  
Vol 31 (4) ◽  
pp. 664-676 ◽  
Author(s):  
Andre Filiatrault ◽  
Steven Kuan ◽  
Robert Tremblay
Keyword(s):  
Fragility Curves ◽  
Companion Paper ◽  
Shake Table ◽  
Free Standing ◽  
Shake Table Tests ◽  
Partition Wall ◽  
Partition Walls ◽  
Building Components ◽  
Functional Components ◽  
Nonstructural Building Components

This paper describes the seismic (shake table) tests conducted on bookcase – partition wall systems. These nonstructural building components can be considered acceleration sensitive (or motion sensitive) rather than drift sensitive. The shake table floor motions used for the seismic testing are described in a companion paper. One bookcase fully loaded with books and two different cantilevered partition wall systems were considered in the shake table tests. Nine different configurations of these free-standing nonstructural building components were tested. For each configuration, three different seismic hazard levels were considered for the motions at the second floor level of a six-storey building designed for two different densely populated Canadian cities (Montréal and Vancouver). A total of 485 shake table tests were conducted in this experimental investigation. The experimental results indicated that pounding between unanchored bookcases and partition walls is very beneficial to the dynamic response of the bookcases, as it prevents resonance from occurring. Also, the seismic performance of bookcases improved dramatically by the proper installation of seismic restraint systems. Experimental fragility curves for overturning of tall bookcases are presented.Key words: bookcases, earthquakes, fragility, interior partition walls, nonstructural, operational and functional components, pounding, seismic restraints, shake table.

scholarly journals Data set from shake table tests of free-standing rocking bodies

2021 ◽  
pp. 875529302110200
Author(s):  
Michalis F Vassiliou ◽  
Cihan Cengiz ◽  
Matt Dietz ◽  
Luiza Dihoru ◽  
Marco Broccardo ◽  
...  
Keyword(s):  
Earthquake Engineering ◽  
Numerical Models ◽  
Three Dimensional ◽  
Time History ◽  
Stochastic Comparison ◽  
Shake Table ◽  
Free Standing ◽  
Earthquake Excitation ◽  
Shake Table Tests ◽  
Data Set

In earthquake engineering, structural models are validated by performing a time history analysis and comparing its maximum to the maximum response obtained by a shake table test. It has been shown that this is a sufficient (but not a necessary) precondition to accept a numerical model. Numerical models can fail to predict the planar rocking response of a rigid block, but may succeed in predicting the statistics of the response to an ensemble of ground motions. As seismic response is inherently stochastic, comparison of the statistics of the numerically simulated response to the statistics of the experimentally obtained benchmark response for the same ensemble of earthquake excitation is a sufficient (and easier to pass) model validation test. This article describes the publicly available data of a set of 12 free rocking vibration and 115 shake table tests of six three-dimensional rocking and sliding columns, designed at ETH Zurich and performed at EQUALS Laboratory, University of Bristol. The data can be used to statistically validate different approaches that aim to model three-dimensional rocking structures.

Evaluation of Out-of-Plane Wall Anchorage Force Provisions in Buildings with Rigid Walls and Flexible Roof Diaphragms

2017 ◽  
Vol 33 (1) ◽  
pp. 1-23 ◽  
Author(s):  
Maria Koliou ◽  
John Lawson ◽  
Andre Filiatrault ◽  
Dominic J. Kelly
Keyword(s):  
Model Building ◽  
Ground Motions ◽  
Time History ◽  
Plane Wall ◽  
Dynamic Analyses ◽  
Out Of Plane ◽  
Current Design ◽  
Nonlinear Time History ◽  
Rigid Walls ◽  
Strong Ground

Heavy concrete and masonry walled buildings with lightweight steel or wood flexible roof diaphragms are a common type of construction in North America. Failures of the out-of-plane wall anchorage to these roof systems and the resulting partial roof collapses during past earthquakes have led to repeated revisions to the seismic design provisions in the U.S. model building codes. However, the force levels considered in the current design provisions have remained largely unchanged since their introduction in the 1997 Uniform Building Code, and these provisions have not been fully tested by strong ground motions in the field. Using a two dimensional numerical framework, a series of nonlinear time history dynamic analyses on various building archetypes were conducted to evaluate the validity of the current wall anchorage design force levels. The results of this study reveal that the current wall anchorage design forces are generally appropriate, but with some very significant exceptions.

scholarly journals Seismic qualification and time history shake-table testing of high voltage surge arrester under seismic qualification level moderate

2018 ◽  
Vol 5 (1) ◽  
pp. 1431375 ◽  
Author(s):  
Noman Ullah ◽  
Syed Mohammad Ali ◽  
Rahman Shahzad ◽  
Faisal Khan ◽  
Sérgio Cruz
Keyword(s):  
High Voltage ◽  
Time History ◽  
Shake Table ◽  
Shake Table Testing

Nonlinear earthquake response of structurally interconnected buildings

1992 ◽  
Vol 19 (4) ◽  
pp. 560-572 ◽  
Author(s):  
André Filiatrault ◽  
Bryan Folz
Keyword(s):  
Seismic Event ◽  
Ground Motions ◽  
Time History ◽  
Earthquake Response ◽  
Historical Earthquake ◽  
Friction Damping ◽  
Building Models ◽  
Coupled Structures ◽  
Nonlinear Time History ◽  
Damping Capability

This paper evaluates the performance of closely spaced plane steel framed buildings interconnected by horizontal structural links to prevent pounding during earthquake excitations. Friction damping capability is incorporated into the modelling of these structural links in order to also determine their potential for dissipating energy during a seismic event. Six pairs of building models, having widely different dynamic characteristics, are considered in this investigation. A parametric study, utilizing nonlinear time-history dynamic analysis, is performed to determine the optimum properties for the structural links when each building pair is excited by three different historical earthquake ground motions. This is followed by a detailed reponse analysis comparison of each of these optimized friction damped coupled structures against their uncoupled and elastically coupled counterparts. Key words: earthquake, steel, frames, inelastic, pounding, friction, damping.

Seismic response analysis of steel–concrete hybrid wind turbine tower

2021 ◽  
pp. 107754632110075
Author(s):  
Junling Chen ◽  
Jinwei Li ◽  
Dawei Wang ◽  
Youquan Feng
Keyword(s):  
Wind Turbine ◽  
Response Spectrum ◽  
Ground Motions ◽  
Time History ◽  
Seismic Action ◽  
Response Spectrum Method ◽  
Spectrum Method ◽  
Wind Turbine Tower ◽  
Ground Types ◽  
Nonlinear Time History

The steel–concrete hybrid wind turbine tower is characterized by the concrete tubular segment at the lower part and the traditional steel tubular segment at the upper part. Because of the great change of mass and stiffness along the height of the tower at the connection of steel segment and concrete segment, its dynamic responses under seismic ground motions are significantly different from those of the traditional steel tubular wind turbine tower. Two detailed finite element models of a full steel tubular tower and a steel–concrete hybrid tower for 2.0 MW wind turbine built in the same wind farm are, respectively, developed by using the finite element software ABAQUS. The response spectrum method is applied to analyze the seismic action effects of these two towers under three different ground types. Three groups of ground motions corresponding to three ground types are used to analyze the dynamic response of the steel–concrete hybrid tower by the nonlinear time history method. The numerical results show that the seismic action effect by the response spectrum method is lower than those by the nonlinear time history method. And then it can be concluded that the response spectrum method is not suitable for calculating the seismic action effects of the steel–concrete hybrid tower directly and the time history analyses should be a necessary supplement for its seismic design. The first three modes have obvious contributions on the dynamic response of the steel–concrete hybrid tower.

Shake table testing of a low damage steel building with asymmetric friction connections (AFC)

2019 ◽  
Vol 155 ◽  
pp. 129-143 ◽  
Author(s):  
Ali A. Rad ◽  
Gregory A. MacRae ◽  
Nikoo K. Hazaveh ◽  
Quincy Ma
Keyword(s):  
Shake Table ◽  
Shake Table Testing ◽  
Steel Building
Sign in / Sign up

Export Citation Format

Share Document