International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 01 | Jan 2024
p-ISSN: 2395-0072
www.irjet.net
A Review of “Seismic Response of RC Structures Having Plan and Vertical Irregularity with and Without Infill Action” Kiran Pradeep Patil1, Dr. A.B. Pujari2 1Post Graduate Student, Department of Civil Engineering, KJCOEMR, Pune, India 2Associate Professor, P.G Coordinator, Department of Civil Engineering, KJCOEMR, Pune, India
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Abstract - A structural engineer's greatest challenge in
today’s scenario is constructing seismic-resistant structures. Uncertainties involved and behaviour studies are vital for all civil engineering structures. The presence of a vertical irregular frame subject to devastating earthquakes is a matter of concern. The extent of the damage seen following the most recent large earthquakes indicates how important it is to reduce the seismic risk associated with infilled reinforced concrete buildings in seismically active areas. Most seismic codes treat infill walls as non-structural features when evaluating existing structures or designing new ones, and they typically lack thorough guidelines for practitioners. However, the community now understands the significance of infills in the seismic behaviour of reinforced concrete structures. The behavior of infill walls, design, and vertical irregularity on the seismic performance of multi-story high-rise structures during different earthquake ground motions were the main topics of this study. Under the linear static & dynamic analysis, reaction characteristics such as story drift, story deflection, and story shear of the structure under seismic stress are studied. This examination focuses on a structure's base shear bearing capability and how well it performs in areas with strong earthquakes. This paper's primary goal is to present an analysis of the damage typologies seen in the most recent earthquakes, along with a discussion of the causes and potential fixes. Subsequently, an overview of both in-plane and out-of-plane testing campaigns related to infilled reinforced concrete frames is provided, together with their pertinent results.
Key Words:
Infill Action, Non-Linear Static and Dynamic Analysis, Story Displacement, Story Shear, Story Drift, Plan and Vertical Irregularity, ETABS.
1.INTRODUCTION These days, the development of efficient strengthening procedures and the evaluation of the seismic vulnerability of existing buildings that were not constructed in accordance with current and modern norms are of utmost importance in the field of seismic engineering. The increase in numerical and experimental research accessible in the literature over the past few years indicates a growing interest in the study of masonry infill walls and their impact on the behaviour of reinforced concrete (RC) buildings during earthquakes. Their © 2024, IRJET
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presence may or may not improve the building's seismic performance, depending on several factors, including their layout and height distribution, whether or not they are connected to the surrounding frame, boundary conditions, the material and mechanical charact-eristics of the infills, as well as the relative stiffness and strength between the infill panel and the frame elements.
2. LITERATURE REVIEW In S.H. Basha, H.B. Kaushik [1], the performance of eleven half-scale, one-story masonry frames filled with reinforced concrete (RC). The effects of slow cyclic inplane lateral loading were investigated experimentally in two phases. The frames loaded with full-scale and halfscale bricks demonstrated greater strength, stiffness, and energy dissipation than their bare frame counterparts, according to results from the first stage (eight frames). The majority of the time, despite the relatively weak masonry, columns crumbled under shear. Shear design of columns was changed in accordance with current seismic requirements in order to postpone shear failure, and tests were repeated on three upgraded frames in the second stage. Even though the shear failure in the columns of the enhanced frame happened at a higher drift level, the insufficiency of the current design codes was demonstrated by the inability to prevent the shear failure in the columns. An idealized load–displacement relationship for RC frames with brick infill was created for various performance levels based on the experimental findings. It has been stated that the weak frame-strong infill arrangement is linked to the frame failure mode, along with the number of stories and bays, axial load ratio on columns, kind of infill, and construction process. It is necessary to design infilled frames to withstand the extra shear force caused by infill. Many nations' seismic design codes treat reinforced concrete (RC) frames like bare frames and ignore the role that masonry infills play in providing lateral load resistance. In R.M. Desai, V.G. Khurd, S.P. Patil, N.U. Bavane [2], According to research, the majority of building structures in use today have asymmetrical elevations because of ISO 9001:2008 Certified Journal
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