International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395 -0056
Volume: 04 Issue: 05 | May -2017
p-ISSN: 2395-0072
www.irjet.net
Analysis of Seismic Pounding between Adjacent Buildings Asharani B. Karamadi1, Rajani Togarsi2, 1P.G
Student, Dept. of civil Engineering, Gogte Institute of Technology, Belagavi, Karnataka, India Professor, Dept. of civil Engineering, Gogte Institute of Technology, Belagavi, Karnataka, India. ---------------------------------------------------------------------***--------------------------------------------------------------------2Assistant
Abstract - In recent years the pounding of adjacent
specifies the minimum seismic gap required between the
structures during earthquakes has been receiving considerable
structures, but still it fails to include all other parameters
attention. Seismic pounding occurs due to collision of two
that leads to the structural deformation. For reducing the
adjacent buildings during earthquake which are having
damage due to pounding the very simple and effective way is
different dynamic characteristics and the buildings vibrate out
by providing enough space between the adjacent structures,
of phase and the at-rest separation distance is inadequate to
but sometimes it is difficult to be implemented due to high
accommodate their relative motions. To mitigate the amount
cost of land in metro cities and everyone wants to construct
of damage from pounding, the most simplest and eective way
the building up to their property line. The pounding between
is to provide minimum separation distance between the
such closely spaced building structures can become a serious
buildings. While seismic pounding can be prevented by
hazard in seismically active regions. By investigating past
providing enough separation distances, sometimes getting of
and recent earthquakes we can observe several pounding
required safe separations is not possible in metropolitan areas
damages. During earthquake the adjacent buildings having
due to high cost of land, limited availability of land space and
deferent dynamic characteristics vibrate out of phase and
the need for centralized facilities under one roof and often
there is insufficient energy dissipation system or separation
ignoring the likelihood of seismic pounding between adjacent
distance to accommodate the relative motions of adjacent
buildings during design.
buildings.
Key Words: Seismic pounding, adjacent buildings, Dynamic characteristics, Minimum separation distance, High cost of land etc.
Different patterns of adjacent structures which may feel seismic pounding are, 1.
Adjacent buildings at same floor levels having different heights.
1. INTRODUCTION
2.
The seismic pounding is known as collision of two buildings which are having different dynamic characteristics
Adjacent buildings with same heights at same floor levels.
3.
and are constructed adjacent to each other. The main reason
Adjacent buildings having different total heights with different floor levels.
for this seismic pounding is lack of separation distance
4.
Buildings which are constructed in a rows.
between the adjacent buildings. This may happen not only in
5.
Adjacent structural buildings with different
buildings but also in bridges and towers which are having minimum separation distance between them. Most of the
dynamic characteristics. 6.
times pounding between the adjacent buildings is commonly observed in the old buildings that were constructed before the earthquake resistant design principles came into the
Adjacent buildings having unequal heights, pounding may occur in columns.
7.
Adjacent buildings having unequal distribution of mass and stiffness.
picture. There are many present seismic codes which Š 2017, IRJET
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