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

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.

The influence of masonry infill on the seismic behaviour of RC frame buildings

2012 ◽  
Vol 44 ◽  
pp. 133-145 ◽  
Author(s):  
Alessandra Fiore ◽  
Adriana Netti ◽  
Pietro Monaco
Keyword(s):  
Rc Frame ◽  
Seismic Behaviour ◽  
Masonry Infill ◽  
Frame Buildings ◽  
Rc Frame Buildings

scholarly journals A SIMPLE METHOD TO ESTIMATE THE BEHAVIOR OF HIGH-RISE RC FRAME BUILDINGS DURING EARTHQUAKES

1994 ◽  
Vol 59 (455) ◽  
pp. 157-166
Author(s):  
Hiroyasu SAKATA ◽  
Kazushi SHIMAZAKI ◽  
Koichi YATSUSHIGE ◽  
Akira WADA
Keyword(s):  
Rc Frame ◽  
Simple Method ◽  
High Rise ◽  
Frame Buildings ◽  
Rc Frame Buildings

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

2010 ◽  
Vol 26 (3) ◽  
pp. 709-729 ◽  
Author(s):  
Sudhir K. Jain ◽  
Keya Mitra ◽  
Manish Kumar ◽  
Mehul Shah
Keyword(s):  
Poor Performance ◽  
Rc Frame ◽  
Seismic Evaluation ◽  
Building Stock ◽  
Seismic Safety ◽  
Rapid Visual Screening ◽  
Frame Buildings ◽  
Damage Data ◽  
Visual Screening ◽  
Rc Frame Buildings

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.

scholarly journals Seismic performance evaluation and risk assessment of typical reinforced concrete frame buildings with masonry infill and conventional vertical extension in Nepal

2021 ◽  
Author(s):  
Sujan Pradhan ◽  
Yuebing Li ◽  
Yasushi Sanada
Keyword(s):  
Seismic Performance ◽  
Brick Masonry ◽  
Rc Frame ◽  
Infill Walls ◽  
Masonry Infill ◽  
Frame Building ◽  
Vertical Extension ◽  
Frame Buildings ◽  
Rc Frame Building ◽  
Rc Frame Buildings

AbstractMany reinforced concrete (RC) frame buildings in Nepal were significantly damaged by the 7.8 magnitude (Mw) earthquake in Nepal on April 25, 2015. To contribute to mitigate future earthquake disasters, the current study focuses on two specific characteristics of residential RC frame buildings in the capital city of Nepal, Kathmandu: the application of brick masonry infill to exterior and partition walls, and the conventional vertical extension of building stories different from the design. Although these factors are likely to significantly affect the seismic performance, their effects are frequently neglected in practical design and construction management in developing countries. Hence, the main objective of this research is to investigate and clarify the seismic performance of RC frame buildings considering the above factors through experimental and numerical investigations. The present paper (1) briefly introduces the characteristics of a typical residential RC frame building in Kathmandu, (2) illustrates the numerical modeling parametrically considering three different contributions of brick masonry infill walls and (3) investigates the seismic performance of the RC frame building considering the effects of the infill wall modeling and the vertical extension through numerical analyses. Consequently, it was found that the consideration of the in-plane stiffness and strength of the infill walls resulted in both positive and negative contributions to the seismic performance of low-rise (up to three stories) and medium-rise (more than three stories) buildings respectively, quantitatively clarifying significant effects of the presence of infill and the vertical extension. These findings contribute to provide realistic solutions to upgrade the seismic performance by utilizing or removing the brick masonry infill walls or by managing the building stories to mitigate future earthquake disasters on typical RC frame buildings not only in Nepal but also in other countries with similar backgrounds.

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

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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