Dynamic Analysis of Semi-Rigid Frames

Öztürk, Ali Uğur; Çatal, Hikmet Hüseyin

doi:10.3390/mca10010001

Cited by 10 publications

(7 citation statements)

References 3 publications

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“…The experimental determination of connection rigidity in combination with the analytical model provides the possibility of investigating the effects of detailing on the overall performance of a structure. The dynamic response of semi-rigid frames modeled by linear elastic rotational springs in the study of Ozturk and Catal [14] which reduced coefficients and lateral rigidity values to represent the real behavior of frames and determined the values for each frame individually. A comparison of the response characteristics of five different multi-story frames with reference to their modal attributes resulted in an indication that connection flexibility tends to increase vibration periods, especially in lower modes.…”

Section: Introductionmentioning

confidence: 99%

Assessment of semi-rigid connections in steel structures by modal testing

Türker

Kartal

Bayraktar

et al. 2009

Journal of Constructional Steel Research

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Section: Introductionmentioning

confidence: 99%

Assessment of semi-rigid connections in steel structures by modal testing

Türker

Kartal

Bayraktar

et al. 2009

Journal of Constructional Steel Research

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“…The slope of convergence curve has defined by equation 4.1. Another example of convergence study is the analysis of full scale models as described in table 4.1which are main part of this study.…”

Section: Reinforced Concrete Frames Using a Genetic Algorithm" And Stmentioning

confidence: 99%

“…Effect of connection rigidity and percentage of castling on fundamental frequency of steel frames also studied. Majority of structural soft wares can evaluate the natural frequencies of frames using their default beam and column profiles same as standard I sections or Wide Flanges in a fraction of second, but most of these soft wares does not have arbitrary castled sections which designer wants to apply in structure [4]. Also when designer wants to calculate the natural period of steel frame using codes and hand calculation, determining the natural frequency of castled steel frame which is key element of seismic and dynamic design of frame is time taking in comparison with non-castled section [5].…”

Section: Introductionmentioning

confidence: 99%

A study on effects of castling on natural frequencies of 3D undamped steel frames using finite element method

Bagheri¹,

Baharom²,

Niaki³

2017

J. Fundam and Appl Sci.

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The effects of castling on natural frequencies in 3D steel frames were investigated in this study since accurate assessment of fundamental period (frequency) of a structure is an essential part of design and analysis processes. The use of LUSAS 14.03 was adopted to calculate free vibration characteristics of frames. Thin shell element was used to modeling frames. The initial results are verified by Cinitha.A, Rama Raju. K & Nagesh.R. Iyer (2008) and hand calculations using UBC code.. Furthermore different parameters such as Number of stories, Height of frames, Percentage of Castling, stiffness of connections and Supports Conditions were considered in order to evaluate their effects in frame modal respond. The results of above investigation show that by increasing the percent of castling the natural frequency will increase. Also by reduction of connection rigidity fundamental frequency will reduce. In order to achieve effective earthquake design we also have to consider these two parameters. Finally some suggestions were made in order to improve steel design against earth quake effects.

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“…Various researchers have conducted studies on numerical modeling using FEM to study regular steel gantries under seismic excitation such as Ozturk and Catal [37], Sekulonic et al [38], Shousuke and Yasuhiro [39] et Sharbane and Niraj Kumar [40].…”

Section: Introductionmentioning

confidence: 99%

Spectral modal modeling by FEM of reinforced concrete framed buildings irregular in elevation

Camellia

2021

IRASE

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The irregular buildings constitute a large part of urban infrastructure and they are currently adopted in many structures for architectural or esthetic reasons. In contrast, the behavior of these buildings during an earthquake generates a detrimental effect on their regularity in elevation which leads to the total collapse of these structures.The objective of this work is essentially to model reinforced concrete framed buildings irregular in elevation subjected to seismic loads by the Finite Element Method (FEM). This modeling aims to evaluate several parameters: displacements, inter-storey drifts and rigidities, using two dynamic calculation methods; one modal and the other spectral modal. The latter is widely used by engineers.For this purpose, a detailed study of the frames which have several setbacks in elevation is carried out to validate the correct functioning of our FEM calculation code in both cases of modal and modal spectral analyses. The performance, accuracy and robustness of the FEM calculation code produced in this study is shown by the good correlation of the obtained results for the treated frames with those obtained using the ETABS software.

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Dynamic Analysis of Semi-Rigid Frames

Cited by 10 publications

References 3 publications

Assessment of semi-rigid connections in steel structures by modal testing

Assessment of semi-rigid connections in steel structures by modal testing

A study on effects of castling on natural frequencies of 3D undamped steel frames using finite element method

Spectral modal modeling by FEM of reinforced concrete framed buildings irregular in elevation

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