International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 09 Issue: 05 | May 2022
p-ISSN: 2395-0072
www.irjet.net
Seismic Behaviour of Reinforced Concrete Flat Plate Systems Syed Muaaz Khaleel1, Sohail Ahmed2, Mohammed Ayub Ansari3, Touseeq Anwar Wasif4 Students, Department of Civil Engineering Professor of Civil Engineering ISL Engineering College, Hyderabad, Telangana, India ---------------------------------------------------------------------***--------------------------------------------------------------------1, 2, 3 UG
4 Asst
Abstract - It is very important in modern construction
because flat slabs have so many advantages over traditional slabs that it is a very important part. Conventional slabs are being replaced by beamless slabs because they look better, take less time to build, are easier to form, and can be used in any room. Because the flat slabs are less stiff and have less shear strength, they can be more flexible than the traditional slabs, which are more rigid. When it comes to flat slabs, structural engineers say they aren't good for high-seismic areas. They need to be built up with shear walls or bracing. Or they need to be changed. The provision says that a structural engineer must do a linear static analysis for the design of a structure. Displacements, storey shears, and overturning moments are the main factors that cause a lot of damage to a building when there is an earthquake. In this study, RCC flat slab structures and traditional slab structures are used to compare a six-story building that is in an earthquake zone-II. For earthquake loading, the provisions of IS: 1893 (Part 1)2002 are used. E-tabs 2021 software is used to make a threedimensional model of the structure and to look at how it works. Linear Static Method of Analysis and Response Spectrum Analysis Method are used to look at both Flat slab structure and Conventional slab structure when they are being looked at. The forces and all of the relative displacements, storey shears, and overturning moments that happen in each of the structures are looked at, as well. The results of the analysis are talked about. It has also been used to figure out how flat slab structures and conventional ones work under lateral loads and earthquakes. The results are compared and it is found that the flat slab structure does better in earthquakes than the traditional slab structure. Key Words: Displacements, Storey Shears, Overturning Moments, Linear Static Analysis, Lateral Loads
1. INTRODUCTION Earthquake is a natural phenomenon that happens when there are changes in the geotechnical activities in the layers of the Earth. It can be very hard to predict and can cause a lot of damage to both life and property if it happens in an area where people live. Earthquakes don't kill people, but they do damage the buildings. For this reason, it is the job of a structural engineer to draw out the parameters from their past work and think about all the hazards that the structure might face in the future, so that it can be built in a way that is as safe as possible. © 2022, IRJET
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There are a lot of ways to look at the structure and figure out how well it will work under a certain load, but the best one is called Non-Linear Time history Analysis. Non-Linear Static methods have been used for structures that aren't very important or that have a lot of seismic risk (NSPs). The results from these procedures may or may not be correct. In general, slabs can be one-way or two-way. One-way slabs are slabs that mostly move in one direction. When slabs are supported by columns that are arranged in rows so that the slabs can move in two directions, they are called two way slabs. beams can be added between the column and the slab to make it more stable. The slabs can also be strengthened by thickening them around the columns (drop panels) and by flaring their columns under the slabs (column capitals) Flat plates are concrete slabs that are the same depth all the way across. They don't need beams, capitals, or drop panels to transfer the weight of the load to the supporting columns. Flat plates can be made quickly because of their simple formwork and bar reinforcements. They need the smallest overall storey heights to meet their head room needs. Then, they are the most flexible when it comes to how columns and partitions are put together. They also let in a lot of light and are very fire-resistant. There aren't many sharp corners where concrete could split. Most of the time, flat plates are used to build multi-story reinforced concrete hotels, flats and houses. They are also used in hospitals, dormitories, and other places where people live. Flat plates could make it hard to move the shear around the outside of the columns. There is a risk that the columns could break through the slabs. People often need to make columns bigger or thicker, use shear heads, or do both. They are made up of I or channel shapes that are cut into the slab above each column. However, it should be noted that the simple formwork needed to make flat plates is usually so cheap that the extra costs for shear heads are more than covered. There may be times when a different type of floor is needed for heavy industrial loads or long spans of space, though. Concrete slabs are often used to carry vertical loads straight to walls and columns without the need for beams and girders, so they don't need to be built. Flat plates are used when spans aren't very long and the loads aren't very heavy, like in apartment and hotel buildings. When there are no column flares or drop panels, the term "flat plate" is used. Column patter is usually done on a rectangular grid, but flat plates can be used with column layouts that aren't all the same size. They have worked well
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