A Predicting Method for Long-Term Behavior of Reinforced Concrete Moment Frames

Afshari, Mohammad Jalilzadeh; Kheyroddin, Ali

doi:10.14359/51718007

Cited by 2 publications

(4 citation statements)

References 9 publications

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“…Hence, in order to simulate the actual behavior during the construction of the building, non-linear construction sequence analysis was performed. In the numerical analysis, ETABS software [33] was used since many studies [12,15,16] were accomplished successfully in the literature.…”

Section: Numerical Examplementioning

confidence: 99%

“…In their study, empirical equations were derived and the ranges of application of these equations were proposed using parametric studies and extensive modelling. Moreover, Afshari and Kheyroddin [16] improved aforementioned study by performing modelling and nonlinear staged analysis on structures with different geometrical characteristics and environmental conditions. They proposed semi-empirical equations to estimate vertical displacement of columns caused by creep, shrinkage for buildings up to 30 stories.…”

mentioning

confidence: 99%

“…Fig 16. Number of groups and compensation errors relationships for penalized errors compensation method with using L2-norm for shear walls in the tower part…”

mentioning

confidence: 99%

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A Practical Compensation Method for Differential Column Shortenings in High-rise Reinforced Concrete Buildings

Seçer

Zamani

İşler

2020

Period. Polytech. Civil Eng.

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High-rise reinforced concrete buildings have technical, economic and environmental advantages for high density development and they have become a distinctive feature for densely populated urban areas around the world. For this purpose, structural design of high-rise reinforced concrete buildings have become forward and particularly serviceability requirements gained more interest. Differential shortening of vertical members is one of the serviceability requirements; however, only a limited number of studies exist. In this study, a practical compensation method was proposed for the differential shortening of columns and shear walls in high-rise reinforced concrete buildings. In the proposed compensation method, vertical members were grouped and the total error was aimed to be minimized by penalizing the higher shortening differences in the groups to simplify the process of building construction. In order to validate the proposed method, a 32-storey high-rise building that was built in Izmir Turkey was investigated considering both the construction sequence and time-dependent effects as shrinkage and creep. Vertical shortening of columns and shear walls in the tower part of the building were calculated. Uniform-grouped compensation method and the proposed penalized errors compensation method with using L1-norm and L2-norm were applied for differential shortenings of columns and shear walls with considering different numbers of member groups. The magnitude of errors for each compensation method was presented and evaluated. Results of the numerical study reveal that the proposed penalized errors compensation method was capable of determining the compensation errors by minimizing the maximum errors efficiently.

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Section: Numerical Examplementioning

confidence: 99%

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confidence: 99%

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A Practical Compensation Method for Differential Column Shortenings in High-rise Reinforced Concrete Buildings

Seçer

Zamani

İşler

2020

Period. Polytech. Civil Eng.

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“…[ 20–23 ] Afshari and Kheyroddin proposed a predicting method for long‐term behavior of the frame in high‐rise structures. [ 24 ] Zou et al found that the concrete column shortening value tended to be underestimated in conventional method by experiments. [ 25 ] Some researchers studied the deformation of CFST, and the creep and shrinkage were found developing more rapidly but lower in magnitude.…”

Section: Introductionmentioning

confidence: 99%

Horizontal deformation and construction analysis of frame–eccentrical core tube structure

Wang

Zhou

Zhu

et al. 2022

Structural Design Tall Build

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Due to creep and shrinkage of concrete, the long-term structural deformation is one of the hottest topics in the study of super high-rise structures. For the frameeccentrical core tube structure, its long-term deformation includes both vertical deformation and obvious horizontal deformation, which will have an inevitable influence on the structural verticality. The horizontal deformation and its formation mechanism in frame-eccentrical core tube structure are studied in this paper. Based on the finite element software ETABS, a refined finite element model combining with the time-dependent material model of concrete is established base on a subsistent structure. According to the actual construction conditions, construction analysis is conducted, and the construction deformation and the long-term deformation after completion are subsequently studied. Based on the results of construction analysis, the effects of elastic modulus, creep, and shrinkage on structural horizontal deformation are analyzed; furthermore, the horizontal deformation characteristics of different structural members in different periods are compared. The results show that the horizontal deformation is related to the vertical deformation of the component, and creep and shrinkage exert opposite effects on the structural horizontal deformation. Besides, the creep and shrinkage are the dominant factors of the horizontal deformation in the later stage. These results are supported by real deformation data obtained from real-time deformation monitoring during construction, which proves the effectiveness of the method adopted in this paper.

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A Predicting Method for Long-Term Behavior of Reinforced Concrete Moment Frames

Cited by 2 publications

References 9 publications

A Practical Compensation Method for Differential Column Shortenings in High-rise Reinforced Concrete Buildings

A Practical Compensation Method for Differential Column Shortenings in High-rise Reinforced Concrete Buildings

Horizontal deformation and construction analysis of frame–eccentrical core tube structure

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