International Research Journal of Engineering and Technology (IRJET) Volume: 09 Issue: 05 | May 2022
www.irjet.net
e-ISSN: 2395-0056 p-ISSN: 2395-0072
Analysis of Circular Water Tanks under Different SeismicConditions For Two Different Conditions Saurabh Dwivedi1, H.K Mahiyar2 1PG
Student (Structural Engineering),2Professor and Head Department of Civil Engineering & Applied Mechanics, Shri G.S. Institute of Technology andScience, Indore, Madhya Pradesh, India ------------------------------------------------------------------------***--------------------------------------------------------------------ABSTRACT Water tanks are very important components of lifeline. They are grave elements in municipal water supply, fire fighting systems and in many industrial amenities for storage of water. In the seismic analysis of ground supported water tanks ,the total mass subjected to the seismic forces is divided into two parts that is impulsive and convective. Impulsive mass is subjected to the impulsive pressure whereas convective mass is subjected to the convective pressure. The impulsive pressures are associated with the inertial forces produced by the accelerations of the walls of the container and are directly proportional to these accelerations. The convective pressures are those produced by the oscillations of the fluid and are therefore the consequences of the impulsive pressures. Corresponding to the impulsive and convective pressure various design parameters like time period, sloshing height, design horizontal seismic coefficient in both impulsive and convective modes is calculated. Keywords:-Convective mass, Impulsive mass, Sloshing height, Spring mass model
INTRODUCTION Water tank is a structure which is used for the storage of liquids. Water tanks are classified based on their shapes and resting condition. If we talk about the shapes then the shapes which are most common are rectangular, square and circular. on the basis of resting condition the tanks are classified as underground, resting on ground and overhead tanks. For storage purpose resting on ground tanks are generally preferred whereas for direct distribution by gravity overhead tanks are generally preferred. Rectangular tanks are generally used when the amount of liquid to be kept is limited. For small capacity circular tanks cost is high because the cost involved with the shuttering increases drastically, whereas for large capacities circular tanks are preferred because they require least perimeter for given area. In the present research work the circular water tanks of different capacities under different seismic conditions are analysed using staad software. hydrostatic loading due to water is considered. OBJECTIVES & PARAMETERS OF STUDY The objectives of the present study is to observe the effect of various parameters like volume oftank, aspect ratio,seismic zones and the height of the tank above and below the ground on time period , design horizontal seismic coefficient (Ahc) and sloshing height which are required for the design of water tanks.The following are the parameters of study 1.
Volume of tank-(500kl,1000kl,1500kl)
2.
Aspect ratio-three different aspect ratios of 0.40,0.55 and 0.70 have been considered
3.
Seismic zone-The location of water tanks in different seismic zones have been considered .The seismic zone II,III,IV&V as defined by IS 1893:2016 have been considered in the design.
4.
The total height of tank(h) has been divided into two parts i.e height of tank above and below the ground have been considered
5.
The two different case have been considered
© 2022, IRJET
|
Impact Factor value: 7.529
|
ISO 9001:2008 Certified Journal
|
Page 1815