A Proposed Rapid Visual Screening Procedure for Seismic Evaluation of RC-Frame Buildings in India

Poor performance of reinforced concrete (RC) frame buildings in India during past earthquakes has been a matter of serious concern. Hence, it becomes important to identify and strengthen the deficient buildings. When dealing with a large building stock, one needs evaluation methods for quick assessment of the seismic safety of existing buildings so that corrective retrofitting measures may be undertaken on the deficient buildings. This paper presents a review of some of the available methods for rapid visual screening (RVS) of RC-frame buildings and proposes a RVS method for RC-frame buildings in India based on systematic studies on damage data of the 2001 Bhuj earthquake.

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SEISMIC CAPACITY OF RC FRAME BUILDINGS WITH MASONRY INFILL DAMAGED BY PAST EARTHQUAKES

Bulletin of the New Zealand Society for Earthquake Engineering ◽

10.5459/bnzsee.53.1.13-21 ◽

2020 ◽

Vol 53 (1) ◽

pp. 13-21

Author(s):

Hamood Alwashali ◽

Md. Shafiul Islam ◽

Debasish Sen ◽

Jonathan Monical ◽

Masaki Maeda

Keyword(s):

Rc Frame ◽

Seismic Evaluation ◽

Seismic Capacity ◽

Simple Method ◽

Evaluation Standard ◽

Masonry Infill ◽

Frame Buildings ◽

Recent Earthquakes ◽

Observed Damage ◽

Rc Frame Buildings

Many of the buildings which experienced damage in recent earthquakes such as the 2015 Nepal Earthquake were reinforced concrete (RC) frame buildings with unreinforced masonry infill walls. This study proposes a simplified procedure to estimate the in-plane seismic capacity of masonry infilled RC frame buildings based on concepts of the Japanese seismic evaluation standard (JBDPA, [1]). The correlation of seismic capacity and observed damage obtained using a database of 370 existing RC frame buildings with masonry infill that experienced earthquakes in Taiwan, Ecuador and Nepal is investigated. The Is index, which represents the seismic capacity of buildings in the Japanese standard, showed good correlation with the observed damage and proved to be effective as a simple method to estimate seismic capacity. The method was then applied to 103 existing buildings in Bangladesh that have not experienced a major earthquake recently. The results emphasize the necessity for urgent seismic evaluation and retrofitting of buildings in Bangladesh.

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Seismic Safety Assessment of Existing Low-rise RC Buildings with Rapid Visual Screenings and Preliminary Evaluation Methods

ASEAN Journal on Science and Technology for Development ◽

10.29037/ajstd.649 ◽

2021 ◽

Vol 38 (1) ◽

Author(s):

Moe Myat Myat Aung ◽

Mya Nan Aye

Keyword(s):

Safety Assessment ◽

Evaluation Methods ◽

Preliminary Evaluation ◽

Seismic Evaluation ◽

Rc Buildings ◽

Index Method ◽

Seismic Safety ◽

Rapid Visual Screening ◽

Detailed Assessment ◽

Visual Screening

Mandalay, the second largest city in Myanmar, is situated near the Sagaing Fault (the major fault in Myanmar) and so it’s a seismic prone area. In Mandalay region, the number of low-rise buildings is much more than that of high-rise buildings. And hence, the seismic safety assessment of low-rise building takes an important role to survive and develop Mandalay as smart city. Detailed seismic evaluation can determine the seismic performance level of the buildings and can give strategies to technically retrofit the structures. First of all, rapid visual screening and preliminary evaluation must be carried out to identify the buildings which need the detailed assessment. Thus, in this study, the rapid visual screening (RVS) and preliminary evaluation will be executed for 26 number of three to eight story RC buildings are investigated for the requirements of detailed assessment with three different RVS and preliminary evaluation methods. The methods used are FEMA P-154, Indian standards and Bangladesh methods. According to the investigation, the results given by FEMA P-154 level 1 and level 2 are more vulnerable than that of other methods. Seismic elevation using seismic index method by Bangladesh can give a reliable data for detail seismic evaluation and retrofit method.

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Practitioner-friendly design method to improve the seismic performance of RC frame buildings

Earthquake Spectra ◽

10.1177/8755293020988019 ◽

2021 ◽

pp. 875529302098801

Author(s):

Orlando Arroyo ◽

Abbie Liel ◽

Sergio Gutiérrez

Keyword(s):

Seismic Performance ◽

Design Method ◽

Three Dimensional ◽

Rc Frame ◽

Structural System ◽

Standard Code ◽

Frame Buildings ◽

Rc Frame Buildings ◽

Mathematical Justification ◽

Story Building

Reinforced concrete (RC) frame buildings are a widely used structural system around the world. These buildings are customarily designed through standard code-based procedures, which are well-suited to the workflow of design offices. However, these procedures typically do not aim for or achieve seismic performance higher than code minimum objectives. This article proposes a practical design method that improves the seismic performance of bare RC frame buildings, using only information available from elastic structural analysis conducted in standard code-based design. Four buildings were designed using the proposed method and the prescriptive approach of design codes, and their seismic performance is evaluated using three-dimensional nonlinear (fiber) models. The findings show that the seismic performance is improved with the proposed method, with reductions in the collapse fragility, higher deformation capacity, and greater overstrength. Furthermore, an economic analysis for a six-story building shows that these improvements come with only a 2% increase in the material bill, suggesting that the proposed method is compatible with current project budgets as well as design workflow. The authors also provide mathematical justification of the method.

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