A SEISMIC EVALUATION METHOD FOR EXISTING REINFORCED CONCRETE BUILDINGS RETROFITTED BY RESPONSE CONTROLLING TECHNICS

Buildings in south of Iraq were designed for gravity loads only. Recent studies showed that the Badra-Amarah fault at the Iraq-Iran boarder is an active fault and could suffer a major damage. Hence seismic evaluation of existing buildings is getting more importance. The objective of this paper is to assess the seismic performance of two reinforced concrete buildings with six floors each, one has a shear wall and the other has not. The concentrated plasticity with nonlinear time history is adopted for the analysis. The spectrum matching method is used to scale three time-acceleration records to the expected seismic level in the region. Three different codes are used for the analysis, the International building code-2012, the Uniform building code-1997 and the Iraqi seismic code-2017. Comparison of results showed that IBC-2012 gave the most conservative results in displacements, number and performance of plastic hinges and base shear. The Iraqi code gave the least values within 60% for the base shear and 18-50% for drifts. As a conclusion, the analyzed buildings are a little beyond the elastic level according to the Iraqi code, beyond the immediate occupancy level according to the UBC-1997 and near the collapse prevention level according to IBC-2012.

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A Proposal on the Simplified Structural Evaluation Method for Existing Reinforced Concrete Buildings with Infilled Brick Masonry Walls

Seismic Hazard and Risk Assessment - Springer Natural Hazards ◽

10.1007/978-3-319-74724-8_33 ◽

2018 ◽

pp. 493-503

Author(s):

Matsutaro Seki ◽

Masaki Maeda ◽

Hamood Al-Washali

Keyword(s):

Reinforced Concrete ◽

Evaluation Method ◽

Brick Masonry ◽

Masonry Walls ◽

Reinforced Concrete Buildings ◽

Concrete Buildings ◽

Structural Evaluation

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Seismic risk priorities of site and mid-rise RC buildings in Turkey

Challenge Journal of Structural Mechanics ◽

10.20528/cjsmec.2020.04.004 ◽

2020 ◽

Vol 6 (4) ◽

pp. 191

Author(s):

Ercan Işık ◽

İbrahim Baran Karaşin ◽

Alper Demirci ◽

Aydın Büyüksaraç

Keyword(s):

Reinforced Concrete ◽

Large Scale ◽

Evaluation Method ◽

Urban Transformation ◽

Reinforced Concrete Buildings ◽

Building Stock ◽

Concrete Buildings ◽

Priority Map ◽

Frequency Relation ◽

The Republic

Especially, the large-scale loss of life and property caused by the significant earthquakes in recent years has brought the importance of research and measures to be taken on this issue. Determining and analysing the ever-increasing building stock of the cities and detecting and managing all information related to buildings are important in terms of spatial planning and urban transformation. This study aims to determine tectonic characteristics calculating a and b values of Gutenberg- Richter magnitude-frequency relation which forms the basis of earthquake statistics for all cities in Turkey and the reinforced-concrete buildings which are primarily risky in terms of urban transformation. For this purpose, a total of 1620, 5-storey buildings from all provinces of Turkey were assessed. Twenty reinforced concrete buildings from each province were taken into consideration which has 5-stories. The first stage evaluation method specified in the principles regarding the identification of risky buildings issued in 2013 by the Republic of Turkey, Ministry of Environment and Urbanization was used in this study. The performance scores for 1620 buildings were calculated by using this method. A risk priority map was created for the provinces, taking into account for these buildings. The study aims to determine risk priorities of site and mid-rise reinforced-concrete buildings among the cities. The results obtained were interpreted and recommendations were made.

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