An approximate method for static and dynamic analyses of symmetric wall‐frame buildings

Bozdoğan, Kanat Burak

doi:10.1002/tal.409

Cited by 32 publications

(13 citation statements)

References 24 publications

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“…In this approach, the primary noncontinuous (discrete) structure, by using a set of assumptions, is modeled as an elastically equivalent continuous structure such as beam model (one-dimensional analytical model based on beam theory) [38,53]. Usually, the continuum approach can be applied to model the low and medium-rise buildings up to 20 stories [64][65][66][67][68][69]. However, several reviewed articles used this approach to model the outrigger and belt-truss system in tall buildings [12,62,70].…”

Section: Continuum Approachmentioning

confidence: 99%

Outrigger and Belt‐Truss System Design for High‐Rise Buildings: A Comprehensive Review Part II—Guideline for Optimum Topology and Size Design

Alhaddad

Halabi

et al. 2020

Advances in Civil Engineering

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This article is the second part of the series of the comprehensive review which is related to the outrigger and belt-truss system design for tall buildings. In this part, by presenting and analyzing as much relevant excellent resources as possible, a guideline for optimum topology and size design of the outrigger system is provided. This guideline will give an explanation and description for the used theories, assumptions, concepts, and methods in the reviewed articles for optimum topology and size design. Finally, this part ended up with a summary for the findings of the reviewed studies, which is useful to understand how different parameters influence the optimum topology and size design of a tall building with outrigger and belt-truss system.

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Section: Continuum Approachmentioning

confidence: 99%

Outrigger and Belt‐Truss System Design for High‐Rise Buildings: A Comprehensive Review Part II—Guideline for Optimum Topology and Size Design

Alhaddad

Halabi

et al. 2020

Advances in Civil Engineering

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“…The mass ratio μ may be chosen in the range of 1/50 to 1/15 for a first design approach. [37] The optimal period of vibration, spring constant, and damping coefficient of the nth TMD are computed by Equations (38) to (40), respectively.…”

Section: Csfdm With Tmdsmentioning

confidence: 99%

“…The value of the lateral stiffness ratio α depends on the flexural and shear rigidities of the building, which can be computed through the individual flexural and shear rigidities of the braced frames and shear walls, just as Bozdogan [38] does. In this way, the use of finite element software packages is avoided; however, in this numerical example, the value of α is obtained by comparing the frequencies of the higher modes of vibration between the CSFCM (Equation 11) and the FEM.…”

Section: Verification and Validation Of The Uniform Csfdmmentioning

confidence: 99%

Coupled shear‐flexural model for dynamic analysis of fixed‐base tall buildings with tuned mass dampers

Huergo

Hernández-Barrios

2019

Structural Design Tall Build

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An equivalent discrete model is developed for time domain dynamic analysis of uniform high-rise shear wall-frame buildings with fixed base and carrying any number of tuned mass dampers (TMDs). The equivalent model consists of a flexural cantilever beam and a shear cantilever beam connected in parallel by a finite number of axially rigid members that allow the consideration of intermediate modes of lateral deformation. The proposed model was validated by a building whose lateral resisting system consists of a combination of shear walls and braced frames. The results showed the effectiveness of TMDs to reduce the peak displacements, interstory drift ratio, and accelerations when the building is subjected to a seismic load. The root mean square accelerations due to along-wind loads also decrease if TMDs are attached to the building. KEYWORDScoupled two-beam model, earthquake engineering, passive control devices, tall buildings, tuned mass dampers, wind engineering | INTRODUCTIONThe lateral deformation of certain types of buildings can be modeled by shear beams and flexural beams. However, there are many buildings for which these two extreme modes of lateral deformation do not adequately represent their dynamic behavior. [1][2][3][4][5][6][7] Miranda, [8] Miranda and Reyes, [9] Miranda and Taghavi, [10] Reinoso and Miranda, [11] Miranda and Akkar, [12] and Cruz et al. [13] considered intermediate modes of lateral deformation in seismic response of buildings through a two-beam model that couples the bending and shear stiffnesses in parallel. Van Oosterhout [14] used the same coupled two-beam model to evaluate the wind-induced acceleration in tall buildings through an analysis in the frequency domain.Dym et al. [15] and Rahgozar et al. [16] considered intermediate modes of lateral deformation in buildings through a Timoshenko beam model that accounts for shear deformation and rotatory inertia by adding them to an Euler-Bernoulli beam. This model reflects a series coupling of the beam's bending and shear stiffnesses, although the effect of rotational inertia is not a significant factor in tall buildings. [15] The literature features several empirical formulas that allow the estimation of the lowest natural frequency of a tall building as a function of its height. [17][18][19][20][21] Dym and Williams [22] concluded that a coupled shear-flexural model in parallel seems the better model for estimating the frequencies of shear wall-frame buildings because it provides predictions that are consistent with the observed data. On the other hand, a Timoshenko beam model cannot exhibit the correct dependence between the frequencies and the height of the building because it reflects a series coupling of the beam's bending and shear stiffnesses. [22] This shows that a coupled shear-flexural model estimates better the frequencies of tall buildings than a Timoshenko beam model, particularly in shear wall-frame buildings and tube-and-core constructions with the parallel nature of the two-beam model in which transverse displacements du...

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“…Other authors (Savassi and Mancini, ) have also developed a one‐dimensional FE numerical version based on the continuous medium technique to analyze coupled shear walls and to emphasize the capacity of a correspondingly simple computer code. In addition, a new approximate method has been proposed (Bozdogan et al ., , Bozdogan, ; Bozdogan, ) based on the continuum approach, the FE method, and the so‐called transfer matrix that is able to simply and efficiently estimate the static and fundamentally dynamic characteristics of coupled walls. Moreover, a method has been proposed (Wdowicki and Wdowicka, ) for the analysis of three‐dimensional shear walls and shear core assemblies having stepwise changes in the cross‐section.…”

Section: Introductionmentioning

confidence: 99%

Novel continuum models for coupled shear wall analysis

Curnis

Faridani

2015

Struct. Design Tall Spec. Build.

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SUMMARYReplacement beam formulations represent a family of 1D continuum models suitable for approximate analyses of the structural arrangements of buildings. In this paper, an energy equivalence approach is applied to coupled shear walls to develop suitable replacement beam models. Assuming properly compatible coupling fields between walls, a novel three-field coupled two-beam approach, therein providing shear and axial deformations, is proposed. The corresponding mathematical formulation provides closed-form solutions for simple loading cases with homogenous properties. Considering slender coupled shear walls, as typically found in tall buildings, the coupled two beams can be reduced to a two-field formulation, i.e., a parallel assembly of an extensible Euler-Bernoulli beam and a rotation-constraining beam. The latter model is solved analytically, and expressions for the tip displacement and base bending moment are presented. A finite element model is then presented and demonstrated to be an efficient tool for static and dynamic analyses. The effects of the axial deformation and degree of coupling on slender coupled shear wall responses are described as being dependent upon two suitable parameters. Various approximate relations are also proposed for design purposes. Finally, the validity of both analytical solutions and the finite element model is confirmed via numerical examples.

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An approximate method for static and dynamic analyses of symmetric wall‐frame buildings

Cited by 32 publications

References 24 publications

Outrigger and Belt‐Truss System Design for High‐Rise Buildings: A Comprehensive Review Part II—Guideline for Optimum Topology and Size Design

Outrigger and Belt‐Truss System Design for High‐Rise Buildings: A Comprehensive Review Part II—Guideline for Optimum Topology and Size Design

Coupled shear‐flexural model for dynamic analysis of fixed‐base tall buildings with tuned mass dampers

Novel continuum models for coupled shear wall analysis

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