Seismic rehabilitation of semi-rigid steel framed buildings—A case study

Shakib, Hamzeh; Joghan, S. Dardaei; Pirizadeh, M.; Musavi, A. Moghaddasi

doi:10.1016/j.jcsr.2011.01.002

Cited by 10 publications

(4 citation statements)

References 1 publication

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“…Hashemi and Hassanzadeh [ 8 ] investigated the seismic behavior of a three‐story building with saddle connections damaged in the Bam earthquake through nonlinear dynamic analysis to establish the cause of damage. Shakib et al [ 9 ] assessed the seismic vulnerability of a 19‐story building with saddle connections. They retrofitted the structure using steel and concrete shear walls and concentric steel bracing to limit drift and decrease the rotational demand on the connections.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical evaluation of the mechanical characteristics of semi‐rigid saddle connections

Moghaddam

Sadrara

2022

Structural Design Tall Build

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Saddle connections are semi-rigid connections that are widely used in Iran. Many existing buildings contain this type of connection. The present study conducted fullscale experiments and used extensive numerical modeling to study the mechanical characteristics of saddle connections. The mechanical characteristics examined were the moment-transfer mechanism, initial stiffness, yield moment, maximum moment, and fracture rotation. The configuration and dimensions of the experimental and numerical specimens were chosen to be similar to those of saddle connections in existing buildings. A parametric study was conducted to determine the factors affecting the mechanical characteristics of these connections. It was shown that the conventional method used to design saddle connections failed to predict the correct stress distribution. Empirical formulas were provided for predicting these mechanical characteristics and it was shown that the proposed expressions could predict the pertinent parameters accurately.

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Section: Introductionmentioning

confidence: 99%

Experimental and numerical evaluation of the mechanical characteristics of semi‐rigid saddle connections

Moghaddam

Sadrara

2022

Structural Design Tall Build

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“…Seismic vulnerability of buildings varies as function of material and geometric characteristics. Analysis of vulnerability is essential for seismic diagnostic in order to program rehabilitation operations to mitigate seismic risk (Buratti et al, 2010;Kaveh et al, 2010;Quanwang 2006, Mehmet andHayri, 2006;Shakib et al, 2011;Hasan et al, 2002;Applied Technology Council ATC-40 (1996). Seismic evaluation and retrofitting of existing buildings describe deficiency-based and systematic procedures based on performance principles to evaluate and retrofit existing buildings to withstand the effects of earthquakes.…”

Section: Introductionmentioning

confidence: 99%

Methodology for optimizing seismic rehabilitation of pre-code reinforced concrete buildings

Haouzi¹,

Kissi²,

Ghoulbzouri³

2014

J. Civ. Eng. Constr. Technol.

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This work deals with optimization of seismic rehabilitation for regular pre-code reinforced concrete buildings. Evaluation of vulnerability is performed through conventional non-linear static pushover computations, using specialized finite element software. Three limitations were considered. These include: a prescribed code seismic design load of roof displacement of the total building, the maximum inter story drift and the prevention of collapse. Four factors characterizing transverse sections of beams and columns and their respective reinforcements are introduced. A complete factorial design of experiment table having three levels has been used to define a finite set of data points where the base shear, the roof displacement and the maximum inter story drift were evaluated. Response surface models were derived then via polynomial regressions and used to write explicitly the optimization problem constraints. Optimal seismic rehabilitation of the building was carried out, with the objective of minimizing the total cost of building structural members.

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“…Shakib et al . () rehabilitated an existing 19‐story semi‐rigid frame building. Three seismic retrofitting methods consisting of concrete shear wall, steel shear wall and steel bracing were discussed to achieve the required stiffness, strength and ductility of the building.…”

Section: Introductionmentioning

confidence: 99%

“…The retrofitting strategy of the existing buildings can be conducted by inserting lateral-resistant elements (such as shear walls and braces), strengthening structural elements (such as jacketing, fiber reinforced polymer (FRP) and cover plates), decreasing demand (reducing the weight, removing the upper stories, changing the use of the buildings, using seismic isolator) and so forth. Shakib et al (2011) rehabilitated an existing 19-story semi-rigid frame building. Three seismic retrofitting methods consisting of concrete shear wall, steel shear wall and steel bracing were discussed to achieve the required stiffness, strength and ductility of the building.…”

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confidence: 99%

Performance-based seismic rehabilitation of existing steel eccentric braced buildings in near fault ground motions

Gerami

Sivandi‐Pour

2013

Struct. Design Tall Spec. Build.

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SUMMARY The devastating effects observed in the recent earthquakes, in terms of loss of lives as well as immediate and long‐term economic losses, have prompted the need to provide documents concerning the assessment and improvement of the structural performance of existing buildings at the time of an earthquake. In this regard, performance engineering is defined as performance‐based seismic design and rehabilitation. There are many reasons for rehabilitation of existing buildings. Changing the building's usage is one of the most common reasons. In the present study, the residential steel buildings were subject to performance‐based rehabilitation, converting to educational use. Several steel frames with dual lateral‐resistant systems (MRF–EBF) and different numbers of stories were initially designed as residential buildings. The frames were rehabilitated according to the current seismic rehabilitation codes and regulations. Cover plates were used to strengthen structural elements. Variations in structural responses were evaluated before and after retrofitting by the use of nonlinear analysis. Moreover, the performance of rehabilitated structures was evaluated, considering the gross features observed in near‐field records. Copyright © 2013 John Wiley & Sons, Ltd.

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Seismic rehabilitation of semi-rigid steel framed buildings—A case study

Cited by 10 publications

References 1 publication

Experimental and numerical evaluation of the mechanical characteristics of semi‐rigid saddle connections

Experimental and numerical evaluation of the mechanical characteristics of semi‐rigid saddle connections

Methodology for optimizing seismic rehabilitation of pre-code reinforced concrete buildings

Performance-based seismic rehabilitation of existing steel eccentric braced buildings in near fault ground motions

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