International Research Journal of Engineering and Technology (IRJET) Volume: 04 Issue: 02 | Feb -2017
e-ISSN: 2395 -0056 p-ISSN: 2395-0072
www.irjet.net
SIGNIFICANCE OF SHEAR WALL IN FLAT SLAB MULTI STORIED BUILDING - A
REVIEW Athira M. V 1, Sruthi K Chandran 2 1PG
Student, Department of Civil Engineering, Sreepathy Institute of Management And Technology, Vavanoor, India 2 Assistant Professor, Department of Civil Engineering, Sreepathy Institute of Management And Technology, Vavanoor, India
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Abstract - Modern trends towards high rise buildings increases recently due to the high increase in the number of tall buildings, both residential and commercial. In every parts of the world flat slab construction are widely used in reinforced concrete structures because; this system reduces the costs of form work and construction time and easy installation. Without beams floor slab system directly supports columns. In comparison with earlier high rise buildings, today’s tall buildings are becoming more and more slender and leading to the possibility of more sway. From lateral loads such as wind, seismic loads shear walls provide the stability to the structure. These shear walls transfer the lateral loads to the foundation by their shearing resistance and resistance to overturning. In the present work, summarized the importance of flat slab construction and revealed the relevance of shear wall in a flat slab multi-storied building.
Fig 1 Punching shear failure in flat slab
Key Words: Flat slab, Shear wall, Linear dynamic analysis, Base shear, Time period, Story drift, Storey displacement 1 INTRODUCTION From last two decades there is a high increase in the high rise buildings and modern trend is towards high rise structures. In tall buildings with increase in height lateral loads have prime consideration. From the effect of gravity resulting most common loads are dead load, live load and snow load. Buildings are also subjected to lateral loads caused by wind and earthquake. Due to the lateral loads develop high stresses, produce sway movement or vibrations. Flat slab is mostly used system to avoid the beam-column clogging, and it is very economical. Flat slabs directly transfer the loads to columns without beams. But flat slabs are not efficient in transfer the lateral loads. Punching shear strength around the column-slab connections always possess a problem. Punching shear is a type of failure of reinforced concrete slabs subjected to high localized forces. When the total shear force exceeds the shear resistance of the slab, the slab will be pushed down around the column is termed as punching shear in flat slabs. This results in the column breaking through the portion of the surrounding slab. As a solution of seismic load resistance, time and cost effective construction shear walls are most effective one method. Š 2017, IRJET
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Impact Factor value: 5.181
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Fig 2 Building collapse due to punching shear in flat slab 2 THEORETICAL BACKGROUND Flat plate construction is widely used in residential, office and industrial buildings in many parts of the world. The main advantage of this construction is the faster construction compared to mushroom and ribbed slabs. Generally, slabs are supported by beams and these beams are supported by columns. Beam reduces available net clear ceiling height. Sometimes beams are avoided and slabs are directly supported by columns. This type of construction provides aesthetical appearance also. Those slabs which are directly supported by columns are called as flat slabs. Flat slab also referred as beamless slab, it is the directly connected by columns without beams. Due to the advantages
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