Review of Seismic Analysis of Multistorey Building with Floating Column

Many smart cities like pune, Mumbai, Bengaluru, Chennai use multi-storey buildings in India today have open first storey as an unavoidable feature. This is firstly being adopted to hold parking or reception cabins in the first storey. Whereas the total seismic base shear as experienced by a building during an earthquake is reliant on its natural period, the seismic force distribution is reliant on the distribution of stiffness and mass along the height. The behaviour of a building during earthquakes depends mainly on its overall shape, size and geometry, in addition to how the earthquake forces are carried to the ground. The earthquake forces developed at extraneous floor levels in a building need to be brought down along the height to the ground by extending or reaching only a little way: any deviation or discontinuity in this load transfer path results in low the manner in which or the efficiency with which something reacts or fulfils its intended purpose of the building.

Buildings with vertical setbacks (like the hotel buildings with a few storey wider than the rest) cause a abrupt jump in earthquake forces at the level of discontinuity. Buildings that have less columns or walls in a particular storey or with oddly tall storey tend to break or collapse which is initiated in that storey. Many buildings with an open ground storey proposed for parking collapsed or Several buildings in densely populated cities were reportedly seen shaking due to the intensity of the quake in Hua-lien, Taiwan, February 6, 2018, a building in Hualien City and The island’s worst tremor in recent quake in September 1999 collapsed due to the quake. Buildings with columns that suspend or float on beams at an intermediate storey and do not go all the means to the foundation have discontinuities in the load transfer path.

What is an earthquake? What causes a building to collapse during an earthquake?

A sudden violent shaking of the ground, typically causing great destruction, as a result of movements within the earth's crust or volcanic action is called earthquake. Buildings collapse in an earthquake because of the vibration of the ground. During earthquakes the vibration of ground can cause the liquefied sand and excess water to force its way to the ground surface from several meters below the ground. Earthquake-resistant structures are structures designed to withstand earthquakes. While no structure can be entirely immune to damage from earthquakes, the goal of earthquake-resistant construction is to erect structures that fare better during seismic activity than their conventional counterparts.