Full-scale dynamic testing of a steel frame building during construction

Memari, Ali M.; Aghakouchak, Ali Akbar; Ashtiany, Mohsen Ghafory; Tiv, Mehran

doi:10.1016/s0141-0296(98)00068-6

Cited by 43 publications

(15 citation statements)

References 7 publications

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“…This phenomenon was later attributed mainly to soil-structure interaction (Trifunac et al, 2001a;Trifunac et al, 2001b). Other studies explored the changes in system parameters before and after retrofit (Çelebi and Liu, 1998), during construction (Memari et al, 1999;Ventura and Schuster, 1996), due to non-structural elements (Pan et al, 2006), and due to water level in a dam reservoir (Proulx et al, 2001). …”

Section: Ambient Vibration Testsmentioning

confidence: 99%

In Situ Dynamic Characteristics of Reinforced Concrete Shear Wall Buildings

Gilles

McClure

2012

Structures Congress 2012

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Structural engineers routinely need to make assumptions about the dynamic properties (natural periods, mode shapes, and damping) of a building to simulate its response to dynamic loads, such as strong winds or earthquake ground motions. However, the assumed properties may significantly differ from those of the actual building, once it is constructed, due to differences between the idealized model and in situ conditions. The main objectives of this study are to evaluate how common models and assumptions used to predict the dynamic properties of buildings compare to those measured in actual buildings, and to develop improved prediction models.To this end, ambient vibration measurements were performed in 39 buildings on the island of Montréal and the dynamic properties of up to six vibration modes were identified, for each of these buildings, using the enhanced frequency domain decomposition method. Though the initial goal was to obtain a representative sample of different types of buildings, 27 of these 39 buildings turned out to be reinforced concrete buildings with shear walls providing the main resistance to lateral loads. Hence, the scope of this study was narrowed to the dynamic properties of reinforced concrete shear wall (RCSW) buildings. The measured dynamic properties of this subset of 27 buildings were then used to evaluate different models, proposed in building codes and in the literature, to predict the natural periods and damping characteristics of these types of buildings. Finally, simple models to predict the natural periods of torsion and second translation modes were proposed based on regression analyses. These models agree very well with those that have been proposed in the literature. Again, equations corresponding to different probability levels (mean, mean minus one standard deviation, and mean plus one standard deviation) were produced as a measure of uncertainty.This study should help engineers select realistic values of the dynamic properties of RCSW buildings for structural analysis and design, and should ultimately improve engineers' ability to predict the dynamic response of these buildings. Further, the proposed models could lead to improved recommendations in building codes.iii This research could not have been possible without the help of many building owners and managers, who allowed our team to perform vibration measurements in their buildings. I would also like to thank the numerous graduate and undergraduate students who were involved in these tests for both their participation and the stimulating discussions that often ensued:

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Section: Ambient Vibration Testsmentioning

confidence: 99%

In Situ Dynamic Characteristics of Reinforced Concrete Shear Wall Buildings

Gilles

McClure

2012

Structures Congress 2012

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“…SCHUSTER et al [2] studied the dynamic behavior of a 32-storey high-rise building during construction based on its ambient vibration in 1994. MEMARI et al [3] tested the dynamic behavior of a steel frame building during construction based on both ambient and simple harmonic forced vibration to analyze the effect of autoclaved cellular concrete block filler walls on the dynamic behavior in 1999. The analogous work on timber framed building was carried out by ELLIS and BOUGARD in 2001 [4] .…”

Section: Introductionmentioning

confidence: 99%

Dynamic behavior of reinforced concrete frame structure during construction

Tian

2008

J. Cent. South Univ. Technol.

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The effects of concrete's time-variant elastic modulus, casting structural components, assembling temporary shoring framework system, and shock by operating construction equipment on dynamic behavior of the reinforced concrete frame structure during construction were investigated. The dynamic tests of an eight-storey reinforced concrete frame structure during full-scaled stages of the sixth storey construction cycle were carried out by ambient vibration. Natural frequencies, corresponding mode shapes and damping ratio were determined by power spectrum processing the tested signal data in frequency domain. The changes of frequencies, mode shapes and damping ratios at different construction stages were given. The results show that natural frequencies and modal damping ratios reach the maximum at stage of casting fresh concrete, especially for higher modes. Modal damping ratios at each construction stage are less than 5% of those during usage.

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“…[1][2][3][4][5][6][7][8][9][10] The resistance to deformation and fracture under dynamic loading is generally lower than under quasistatic loading, which can fatally affect the overall fracture toughness of structural materials. Thus, detailed studies employing effective and quantitative evaluation should be made to determine how to maintain the deformation and fracture resistance of the materials so that they can be widely applied to various industrial fields.…”

Section: Introductionmentioning

confidence: 99%

Effects of martensite morphology and tempering on dynamic deformation behavior of dual-phase steels

Lee

Hwang

Lee

et al. 2004

Metall Mater Trans A

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The effects of martensite morphology and tempering on the quasistatic and dynamic deformation behavior of dual-phase steels were investigated in this study. Dynamic torsional tests were conducted on six steel specimens, which had different martensite morphologies and tempering conditions, using a torsional Kolsky bar, and then the test data were compared via microstructures, tensile properties, and fracture mode. Bulky martensites were mixed with ferrites in the step-quenched (SQ) specimens, but small martensites were well distributed in the ferrite matrix in the intermediate-annealed (IA) specimens. Under a dynamic loading condition, the fracture mode of the SQ specimens was changed from cleavage to ductile fracture as the tempering temperature increased, whereas the IA specimens showed a ductile fracture mode, irrespective of tempering. These phenomena were analyzed in terms of a rule of mixtures applied to composites, microstructural variation, martensite softening and carbon diffusion due to tempering, and adiabatic shear-band formation.

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Full-scale dynamic testing of a steel frame building during construction

Cited by 43 publications

References 7 publications

In Situ Dynamic Characteristics of Reinforced Concrete Shear Wall Buildings

In Situ Dynamic Characteristics of Reinforced Concrete Shear Wall Buildings

Dynamic behavior of reinforced concrete frame structure during construction

Effects of martensite morphology and tempering on dynamic deformation behavior of dual-phase steels

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