An approximate method for lateral stability analysis of wall-frame buildings including shear deformations of walls

Bozdoğan, Kanat Burak; Öztürk, Duygu

doi:10.1007/s12046-010-0008-y

Cited by 14 publications

(4 citation statements)

References 21 publications

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“…If it is solved based on the free lateral displacement frame columns, the results will be conservative. To solve these problems, some researchers conducted studies [4][5][6][7][8][9][10][11][12][13][14]. Among them, Chen [6] and Mageirou [7], investigated the stability of braced frame columns and derived formulas to compute the effective length coefficient of frame columns with arbitrary bracing stiffness through computer calculations.…”

Section: Introductionmentioning

confidence: 99%

“…Among them, Chen [6] and Mageirou [7], investigated the stability of braced frame columns and derived formulas to compute the effective length coefficient of frame columns with arbitrary bracing stiffness through computer calculations. Rosman [8] and Bozdogan [9] analyzed overall stability of frameshear wall structures. The frame was continuously transformed into a shear cantilever beam and shear wall to form a double-lateral force resistance system.…”

Section: Introductionmentioning

confidence: 99%

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A Simplified Method for Analyzing Overall Stability of Flexural-Type Braced Frame Structures

2023

Teh. vjesn.

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It is difficult to determine the effective length coefficient of weakly braced frame columns using the effective length coefficient method. When the stability of braced frame structures is calculated using the effective length coefficient method, it cannot reflect the effect of the brace on the frame, the mutual support of columns on the same floor, and vertical interactions between different floors, which is easy to lead to unreasonable design. In this study, based on a spring-rocking column model, the structural transformation concept was used to transform the second-order problem of determining the critical force of braced frame structures into a first-order problem of calculating the lateral stiffness of the structure. First, the repetitive frame element was used to obtain the lateral stiffness of each floor, and the second-order effect coefficient was used to determine the load stiffness of the floor. Next, the lateral stiffness and load stiffness of each floor was assembled. Finally, the principle in which the load stiffness reduces the lateral stiffness of the structure to zero when the braced frame structure buckles laterally were applied to derive a formula to directly calculate the critical force of the flexural-type brace frame structure. This formula reflects the interactions between the braced structure and the frame, the mutual support of columns on the same floor, and the vertical interactions between different floors. Therefore, it can compensate for the deficiency in which the criterion cannot calculate the critical force of braced frame structures and is suitable for quantitatively analyzing the vertical interactions between different floors of braced frame structures.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Simplified Method for Analyzing Overall Stability of Flexural-Type Braced Frame Structures

2023

Teh. vjesn.

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“…With the rapid development of computation theory, the computation methods for high-rise buildings have gained great progress, from the initial vibration analysis of plane frame structure to current space finite element analysis [1]，the method of analysis is more and more accurate and complex [2,3]. In actual engineering, there is some degree of difficulty to perform a finite element analysis (FEA) for the whole structure, and FEA is only carried out for parts where there is complex stress distribution.…”

Section: Introductionmentioning

confidence: 99%

Study on simplified calculation method for the vibration characters of frame-shear wall structures

Huang¹,

Tu²,

Zhang³

2012

Proceedings of the 2nd International Conference on Electronic and Mechanical Engineering and Information Technology (2012)

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Abstract. Two simplified methods are introduced in the paper, in which periods and mode shapes are obtained through solving the story lateral stiffness of frame-shear wall structures, the method of solving the differential equation and the method of substructure. On the basis of assumption for structure, the assembling strategy of mass matrix and stiffness matrix are discussed specially. The periods and mode shapes can be acquired through both methods and the results are compared and analyzed with PKPM and ANSYS. The computation programs are very convenient and can gain the periods and mode shapes quickly. The methods will create some degree of errors, but it is in the scope of acceptance. They are of great reference to structural designers and scientific researchers.

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“…Although several analytical studies related to rigidity center locations and their effects on buildings are available, there are a limited number of experimental studies dealing with rigidity center calculations [27][28][29][30][31][32][33]. Half-scale single-story buildings with two spans in both directions were experimentally tested considering the torsional irregularities created by slab openings.…”

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confidence: 99%

Experimental Evaluation of Rigidity Center

2023

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It is known that when a reinforced concrete building exposed to a horizontal load is subjected to torsional moments around its center of rigidity, additional shear stresses occur in the vertical load-carrying elements, such as the columns and shear walls. Therefore, in order to estimate the additional stresses caused by the torsion, the rigidity center should be calculated precisely. It is known that there are several analytical approaches to calculating the rigidity center location. These approaches do not calculate the rigidity centers close to each other in asymmetric buildings. As significant differences were observed in the calculation of the rigidity center using analytical methods, it was decided to seek verification by conducting an experimental study. In order to calculate and verify the location of the rigidity center, an extensive experimental study was planned. A total of 20 scaled and revised buildings were built, and they were tested in the specially designed test setup. The tested buildings had square, rectangular and irregular floor plans. In addition, vertical load-carrying members were either symmetrically placed on the floor plan or kept asymmetrical to see the effect of their location on the rigidity center. All the buildings were tested under their self-weight, and the corresponding displacements were recorded. Additionally, all the buildings were modeled using ETABS to verify the theoretical background of the rigidity center. From the test results, it was found that the resultant shear force can be calculated by multiplying the displacements of each member of a given story found from the tests on its bending stiffness, and this will give the location of the rigidity center. The rigidity center was found to be identical to the results obtained from the 3D model analysis using ETABS, although it uses a different procedure. As the results from the experiment and 3D model are close to each other, it can be said that the rigidity center of reinforced concrete buildings can be found from simple tests using any material that has almost uniform mechanical properties.

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An approximate method for lateral stability analysis of wall-frame buildings including shear deformations of walls

Cited by 14 publications

References 21 publications

A Simplified Method for Analyzing Overall Stability of Flexural-Type Braced Frame Structures

A Simplified Method for Analyzing Overall Stability of Flexural-Type Braced Frame Structures

Study on simplified calculation method for the vibration characters of frame-shear wall structures

Experimental Evaluation of Rigidity Center

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