SEISMIC ANALYSIS AND COMPARISON OF OVERHEAD INTZE WATER TANK, CIRCULAR WATER TANK AND RECTANGULAR WATER TANK AND RESPONSE SPECTRUM ANALYSIS (original) (raw)
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IRJET- Elevated Water Tank Design and Seismic Study in Various Zones
IRJET, 2021
The need for water varies throughout the day. It changes from hour to hour. We need to store water in order to deliver a consistent volume of water. As a result, water tanks must be built to accommodate the public's need for water. They play a critical role in municipal water supply, firefighting systems, and a variety of other applications. In India, the Intze style of overhead water tank is widely used. The purpose of this research is to understand the behaviour of an overhead water tank responds to various loading situations during earthquakes. The Intze tank was designed using the IS:3370 part I (General Requirement) and Part II (Reinforced Concrete Structure) code of practice for concrete structures for liquid storage. In this research study the capacity of 250 m 3 intze tank has been constructed and studied using the response spectrum approach and SAP2000 is used to do the analysis. Seismic response parameters such as base shear, base moment, and tank displacement under empty and full conditions in seismic zones II, III, IV, and V were computed and the results were compared.
Response Spectrum Analysis of Elevated Circular and Intze Water Tank
Elevated water tanks are used for storing water in public water distribution system. These water tanks are most important structures in regions of high seismic intensity, the failure of these water tanks may cause serious hazards for people due to shortage of water or difficulty in putting out fire during earthquake. Earthquake causes various types of failures such as failure of supporting soil and damage to supporting staging. In this present study twelve number of elevated circular and Intze water tanks of 2L litres capacity supported on RCC frame staging under earthquake loads as per draft code Part II of IS 1893: 2002 are considered out of which six models are Intze type and six models of circular type. Response spectrum analysis for elevated circular and Intze water tanks with empty, half-filled and full condition in seismic zones II and V is Carried out using STAAD Pro V8i SS6.
Seismic Analysis and Design of INTZ Water Tank by Using Staadpro
Water tank is used extensively for storage water, inflammable liquids, and other chemicals. The current analysis and design of supporting structures of elevated water tanks are extremely vulnerable under lateral forces due to wind and an earthquake, By past provided illustration when a great many water tank staging's suffered damage and a few collapses. The aim of this paper is to understand the behaviour of Elevated Water Tank with the framed staging in lateral earthquake loading using Indian code guidelines by using Staad Pro. By using Rapid Assessment of Seismic Safety of Elevated Water Tank gives the optimum value of Base Shear and Base Moment and hence it is economical. The design based on above gives the most economical section and also it is safe.
Seismic Analysis and Design of INTZE Type Water Tank
Due to enormous need by the public, water has to be stored and supplied according to their needs. Water demand is not constant throughout the day. It fluctuates hour to hour. In order to supply constant amount of water, we need to store water. So to meet the public water demand, water tanks need to be constructed. They are grave elements in municipal water supply, firefighting systems and in many industrial amenities for storage of water. Intze type tank is commonly used overhead water tank in India. These tanks are designed as per IS: 3370 i.e. Code of practice for concrete structures for storage of liquids. BIS implemented the revised version of IS 3370 (part 1& 2) after a long time from its 1965 version in year 2009. Presently large number of overhead water tanks is used to distribute the water for public utility. Most of the water tanks were designed as per old IS Code: 3370-1965 without considering earthquake forces. The objective of this dissertation is to shed light on the Intze water tank designed considering the earthquake forces according to Indian standard code: 3370-2009 and draft code 1893-Part 2, (2005) considering two mass modal i.e. impulsive and convective mode method. Intze tank supported on frame staging .Also this report includes analysis by STAAD Pro for wind and seismic forces .Finally the results are validated with the results of manual calculation From the present study, it was observed that, for elevated tanks the two degree of freedom idealization of tank have shown better results when compared to single degree of freedom of idealization.
IRJET, 2021
Raised water tanks are among the most crucial constructions in seismic tremor inclined regions. These designs have a high grouping of mass at the highest point of slim supporting constructions, making them especially powerless against even powers brought about by quakes and wind. They are fundamental parts in metropolitan water supply, firefighting frameworks, and numerous modern offices for water stockpiling. Accordingly, raised water tanks should keep on working even after the quake. In India, the Intze type tank is the most normally utilized overhead water tank. Right now, an enormous number of overhead water tanks are utilized to disperse water for public utilities. Most of the water tanks were underlying understanding with the old IS Code: 3370-1965, which didn't consider seismic tremor powers. Since raised tanks are every now and again utilized in seismically dynamic regions, their seismic conduct should be totally examined. A portion of the water tanks imploded or were seriously harmed because of an absence of information about the supporting framework. Accordingly, there is a need to zero in on seismic wellbeing of life saver structures as far as substitute supporting frameworks that are protected during tremors and can withstand higher plan powers. The objective of this exposition is to reveal insight into the Intze water tank planned in view of seismic tremor powers as indicated by Indian standard code 1893-Part 2, (2005) and to investigate the design with earth shudder powers.
Seismic Analysis of Elevated Intze Type Water Tank
2019
As known from previous occurrences, Elevated water tanks were heavily damaged or collapsed during earthquakes. This might be due to lack of knowledge about seismic behaviour of water tank or improper geometrical selection of staging patterns. The staging plays critical role in design of water tanks as in water tanks large mass is supported by slender staging. The main objective of this study is to understand the seismic behaviour of tank under various staging patterns using SAP2000 software. In this paper different staging patterns considered are normal hexagonal bracing, hexagonal and cross bracing and hexagonal and radial bracings.
First Order Analysis of Elevated water Tanks during Seismic activity using Staad.pro v8i
An Earthquake plays an important role in studying the behavior of structure, since they were used for living and storing purpose. Earthquake shaking depend on the intensity of vibration, the nature of rock, the surface soil type and depth of soil above the bed rock. As we have seen in past many elevated structure were collapsed or damaged during the seismic activity. When there is horizontal ground motion, the tank wall and liquid are subjected to horizontal acceleration. So, in Staad.Pro, we compare all the overhead tanks on the basis of First order analysis by using given parameters for the same capacity (300m 3 ), height (16m) and bracing interval, and checked that how much displacement is affected during seismic activity(in Zone II and V) due to self weight in empty condition for different shapes of elevated storage tanks like rectangular, circular and Intz type tank.
IRJET- Seismic Performance Evaluation of Elevated Intze Water Tank by Using Finite Element Analysis
IRJET, 2020
Reinforced concrete elevated intze water tank are very important structures. They are considered as main lifeline elements during and after earthquakes. An intze tank behaves like an inverted pendulum which consists of huge water mass at the top of a slender staging. This is most critical consideration for the failure of the tank during earthquake. Basically, support system, so called staging is formed by a group of columns and horizontal braces providing at column. Staging is responsible for lateral resistance of complete structure. This analysis is carried by finite element method as intze tank subjected to seismic loading on zone 4 according to the Geographical Survey of India. Comparison of principle stresses and deflection for different filling condition is done for seismic and wind loading is done. The analysis can be performed for different type of water tank with different capacity. Same analysis can be performed for different seismic zone in India. This analysis can also be performed with using different storing material instead of water. Stresses are increase with increase the water level in tank due to FSI effect of fluid, stresses at tank full condition are found approximately double of the stresses in tank empty condition. Deflection are also increase with increase the water level in tank, Increments in stresses and deflections with increment of water level is very less in application of wind load, maximum stresses and deflection in different filling condition are almost same for wind loading.
RESPONSE OF ELEVATED WATER STORAGE TANKS UNDER SEISMIC EVENTS
IRJET, 2022
The current analysis and designs of elevated overhead tanks are extremely weak under adjacent forces due to an earthquake zone. In the past earthquakes, it has ensued found that the reinforced concrete elevated overhead tanks under lateral earthquake loads were suspectable where in some cases the structure has experienced collapse. Whereas the water works as an important role in the dayto-day life of a human being the elevated tanks should be designed as per the code provisions so that to avoid the failures of the structure and for the life of the structure. The study and creation of the elevated overhead tanks are done in ETABS software according to Indian Standards Codes. The reinforced concrete elevated water storage tank and the steel elevated water storage tanks have been designed for a full tank condition and the response spectrum plots and the time-history plots are also generated along with displacements & drifts. The columns and beams of the reinforced concrete storage tank are designed in accordance with IS456:2000 and the steel water tank is designed in accordance with IS800:2007. The designed structure is analyzed to check the reaction of the structure under the seismic events and the time history analysis is also being analyzed from the previous records.
As known from very upsetting experiences, liquid storage tanks were collapsed or heavily damaged during the earthquakes all over the word. The economic lifetime of concrete or steel tanks is usually in the range of 40 to 75 years (ALA 2001).Damage or collapse of the tanks causes some unwanted events such as shortage of drinking and utilizing water, uncontrolled fires and spillage of dangerous fluids. Due to this reason numerous studies done for dynamic behavior of fluid containers; most of them are concerned with cylindrical tanks. In this study, Seismic forces acting on an Elevated water tank e.g. circular Tank and rectangular tank are studied with constant stagging height. Seismic forces acting on the tank are also calculated changing the Seismic Response Reduction Factor(R). IS: 1893-1984/2002 for seismic design and then checked the Design of Tanks by using the software STAAD PRO.