Seismic Waves in Buildings with Shear Walls or Central Core

Todorovska, Maria I.; Lee, V. W.

doi:10.1061/(asce)0733-9399(1989)115:12(2669)

Cited by 49 publications

(24 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are only a few publications on wave-propagation methods for analyses of building response, other than nondestructive testing, for structural health monitoring and damage detection in civil structures [7][8][9][10][11][12][13]. Safak [14] proposed a layered continuous model for analysis of seismic response of a building and detection of damage by tracing changes in the parameters in the layers.…”

Section: Introductionmentioning

confidence: 99%

Rotations in a shear-beam model of a seven-story building caused by nonlinear waves during earthquake excitation

Gičev¹,

Trifunac

2009

Struct. Control Health Monit.

View full text Add to dashboard Cite

SUMMARYWe model a seven-story, reinforced-concrete building in Van Nuys, CA, which was damaged during the 1994 Northridge earthquake. We use a one-dimensional, layered, shear-beam model with bi-linear material properties, and we examine how the rotations (local strains and drifts) in this model depend upon the distribution of the stiffness along the building height, the nonlinear properties of the reinforced concrete, and the nature of strong motion. We show how, following the powerful waves propagating up and down the building, point rotations take place that differ from the corresponding average drift angles. These point rotations are larger near the rigid floor slabs (near the top and bottom ends of the columns, shear walls, and nonstructural members found at all floors) and propagate as slow waves up and down the building. These slow rotational waves occur only while the material is experiencing large nonlinear deformations, and their amplitudes grow with ductility. We note that recording these rotational waves in real time may provide a powerful new vehicle for health monitoring of full-scale structures excited by large transient forces when their structural members enter large nonlinear deformations.

show abstract

Section: Introductionmentioning

confidence: 99%

Rotations in a shear-beam model of a seven-story building caused by nonlinear waves during earthquake excitation

Gičev¹,

Trifunac

2009

Struct. Control Health Monit.

View full text Add to dashboard Cite

show abstract

“…g ω and g ς are the natural frequency and critical damping ratio of soil layer, f ω and f ς are meters of a second filter which is introduced to assure a finite power for the ground displacement. In this example, 15 …”

Section: Stationary and Non-stationary Seismic Random Responsementioning

confidence: 95%

“…This simple structural model can represent various types of engineering systems such as tall buildings, dams or soil profiles. The shear beam as the model of multistorey building is widely used [13][14][15][16]. Although the shear beam seems quite simple as a building model, it is allowed to analyse complicated shear wave propagation effects which are very difficult to be explained by the traditional finite element approach commonly used in seismic engineering.…”

Section: Shear Beam Modelmentioning

confidence: 99%

Seismic random vibration analysis of shear beams with random structural parameters

et al. 2010

View full text Add to dashboard Cite

The seismic random vibration responses of shear beam structures with uncertainty are investigated. The structural mass and stiffness are considered as random variables. The excitations adopted are stationary or non-stationary random process ground accelerations in horizontal direction. Using the structural random response in frequency domain, the mean square seismic random displacements of shear beam structures are expressed as the function of random structural parameters. Computational expressions for the mean value and standard deviation of structural seismic random response are then developed by means of the random variable's functional moment method. The effects of the randomness of structural parameters on the structural random responses are demonstrated by an engineering example.

show abstract

“…We will also consider some results based on the forced-vibration tests [65], but most of our examples will be drawn from studies of the recorded responses of several buildings during strong earthquake shaking. We will use wave-propagation methods to interpret structural response [38,53,67,80,81,93,95,96,[104][105][106][107]131,94,28,29], and to monitor changes in response time and amplitude we will use moving-window Fourier analyses [141,142], impulseresponse analysis [90], and interpretation of novelties in terms of wavelet decomposition of time series [97,103]. The reader can find examples of other methods of analysis in the articles mentioned, which also deal with many other non-earthquake-related aspects of structural health monitoring (e.g., [15,19,24,25,31,51,52,62,85]).…”

Section: Introductionmentioning

confidence: 99%