scholarly journals Use ofIn-SituDynamic Measurements to Calibrate Analytical Models of RC-Elevated Water Tanks

2012 ◽  
Vol 19 (5) ◽  
pp. 903-914
Author(s):  
H.M. Lopes ◽  
C.S. Oliveira
Keyword(s):  
Water Supply ◽  
Analytical Models ◽  
Ambient Vibration ◽  
Mode Shapes ◽  
Water Supply Systems ◽  
Water Tank ◽  
Analysis And Design ◽  
Elevated Water ◽  
Water Tanks

Before establishing the priority settings for the reduction of seismic risk of water supply infrastructures, it is necessary to understand the dynamic behavior of elevated water tanks, which are components of those infrastructures. Among other information, the main frequencies of vibration of these structures must be estimated and the analytical models used in their analysis and design should reproduce the frequency values obtained by in-situ dynamic tests. This work focuses exclusively on reinforced concrete (RC) elevated water tanks (200–750 m^3 of water at heights of 30–40 m), which are very common structures in the water supply systems in Portugal since the mid XXth century. This type of structures can also be seen in many regions around the world. First, a nationwide survey was conducted to determine the most common typologies in the country in terms of structural layout. Second, an in-situ campaign using ambient vibration as input was performed for a group of selected structures to determine the main frequencies of vibration and to identify modal shapes and damping values. Third, a finite element model of several different typologies was developed using the water simply as a concentrated mass at the top; the elastic properties of the model of the structure including the foundation were calibrated, so that the frequencies of various mode shapes obtained by the analytical model would match the frequencies of the real structure. Finally, an expression was derived to estimate the fundamental frequency of a group of elevated water tank typologies based on the total mass at the top of the supporting structure, which include the water, the global lateral stiffness, and the height of the tank. This study, providing important information on the frequencies of vibration of RC-elevated water tanks, contributes in a definite way to the analysis and design of such water tanks.

Non-Linear Time History Analysis of an Elevated Water Tank

2021 ◽  
Vol 9 (VI) ◽  
pp. 4327-4334
Author(s):  
Mr. Rohit Kiran Chaudhari
Keyword(s):  
Reinforced Concrete ◽  
Seismic Analysis ◽  
Linear Time ◽  
Time History ◽  
Seismic Energy ◽  
Soil Condition ◽  
Mode Shapes ◽  
Water Tank ◽  
Elevated Water ◽  
Water Tanks

It was discovered that reinforced concrete elevated water tanks with frame staging outperformed reinforced concrete elevated water tanks with shaft staging in terms of seismic resistance. These can be due to the frame staging's seismic energy absorption capability. As a result, the primary goal of this research is to better understand the seismic behavior and performance characteristics of elevated water tanks with frame staging. Furthermore, when compared to other shapes, circular tanks have the smallest surface area for a given tank size. As a result, the amount of material needed for a circular water tank is less than for other shapes. As a result, a circular water tank was chosen, and seismic analysis of elevated RC circular water tanks was carried out according to IITK-GSDMA guidelines, with the behavior of the water tank analysed for various parameters such as zone factor, soil condition, and different staging heights. SAP 2000 was used to determine the structure's modal characteristics (mode shapes and modal participation mass ratio).

COMPARATIVE STUDY OF DESIGN OF ELEVATED WATER TANK

2018 ◽  
Vol 5 (02) ◽  
Author(s):  
Saurabh Agarwal ◽  
Vishnu Sharma
Keyword(s):  
Structural Design ◽  
Design Evaluation ◽  
Seismic Load ◽  
Water Tank ◽  
Element Analysis ◽  
Analysis And Design ◽  
Rectangular Tank ◽  
Overall Performance ◽  
Elevated Water ◽  
Water Tanks

This Paper deals with the layout and designing of Intze Tank, Circular Tank, and Rectangular Tank with stagingusing dynamic analysis. It concludes the low in cost layout inside which it includes the structural design, evaluation of shape which may be used for element estimation of this type of water tank i.e. Intze Tank, Circular Tank, Rectangular Tank and modeling is carried out by using finite element analysis base software STAAD PRO. Evaluation of tanks is about the analysis and design of sub structure and super structure. The layout of liquid retaining structure considering theentire economic system of the tank as an objective feature of the tank.Elevated water tanks are one of the most essential inside the daily requirement. This Paper is concerned with the overall performance in cost of water tank under seismic load as in keeping with IS 1893(part1):2002ZONE II. The consequences acquired from the analysis are as compared and the conclusions are drawn.

scholarly journals Elevated Water Tank

2019 ◽  
Vol 8 (12S2) ◽  
pp. 271-276
Keyword(s):  
Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Water Tank ◽  
Elevated Water ◽  
Water Tanks ◽  
The Way

Water tanks are the capacity booths for putting away water. Raised water tanks are built to be able to deliver required head with the purpose that the water will movement affected by gravity the development exercise of water tanks is as antique as enlightened guy. The water tanks project has an firstrate want as it serves ingesting water for amazing populace from exceptional metropolitan urban groups to the little population dwelling in cities and towns. The smaller than ordinary project is led for a time of 15 days to have total all the way right down to earth information on unique tactics and issues appeared within the field. An change issue like construction factors, layout Parameters, information of Formwork, information of aid, process of Water treatment Plant and Execution had been controlled over the span of our smaller than regular undertaking."improved water tanks" via raising water tank, the enlargement upward push makes a conveyance strain at the tank outlet. The profile of water tanks begins offevolved with the utility parameters, consequently the type of materials applied and the form of water tank become directed by way of approach of those factors: 1. Vicinity of the water tank (inner, out of doors, over the floor or underground). 2. Volume of water tank need to preserve. 3. What the water may be utilized for? Four. Temperature of territory wherein might be located away, fear for solidifying. Five. Weight required conveying water. 6. How the water to be conveys to the water tank. 7. Wind and quake plan contemplations allow water tanks to endure seismic and excessive wind occasions

scholarly journals Innovative Experimentation on Hollow Cylindrical Shells of Reinforced Concrete under Axial Compressive Load

2019 ◽  
Vol 8 (3) ◽  
pp. 2044-2049
Keyword(s):  
Reinforced Concrete ◽  
Axial Compression ◽  
Structural Model ◽  
Testing Machine ◽  
Compressive Load ◽  
Water Tank ◽  
Critical Question ◽  
Axial Compressive Load ◽  
Elevated Water ◽  
Water Tanks

Reinforced concrete elevated water tanks supported on shaft type staging system are popularly constructed now a days for storage of water for water supply schemes. If slip form is used for casting of the shaft staging, the water towers generally require lesser time for construction. Elevated water tanks are top heavy structure especially in the tank full condition. It is often a critical question in structural design that what should be the proper structural model adopted for design of such class of structure. Should the shaft be designed as a hollow cylindrical column subjected to axial compression or is it essentially a R.C. cylindrical shell subjected to membrane forces under axial compression. To better understand it is proposed to cast such R.C. shells and after water curing for 28 days shall be subjected to axial compressive load in a compressive strength testing machine. The failure pattern of the shells shall be observed critically to get a proper understanding of behavior of such R.C shaft supported elevated water tank structures.

scholarly journals Analysis and Design of Intze Water Tank by Using STAAD Pro

2021 ◽  
Vol 309 ◽  
pp. 01178
Author(s):  
Chandana Imadabathuni ◽  
Padala Sri Vardhan Goud ◽  
Nalla Ravi Kiran ◽  
Bathula Naveen
Keyword(s):  
Water Demand ◽  
Food Industry ◽  
Water Storage ◽  
Water Tank ◽  
Paper Mills ◽  
Analysis And Design ◽  
Water Tanks ◽  
Supply Water

Water tank is a water storage structured built for long term use. These tanks were utilized for various uses like distribution of water, firefighting, agriculture, food industry, paper mills etc. It comes in handy when there is an intermittent supply of water or scarcity of water. Materials like concrete, pvc Galvanized Iron, fibre is used to manufacture tanks. Water is pumped through pipe by using pumps from a source. For distribution purpose water can be distributed either gravity or pump to reach individual with desired pressure and velocity. Volume is calculated based upon population and their usage and demand. Water demand varies hour to hour. For a continues supply water tanks are best suited. To meet water demand by public water tanks are to be constructed. Design and analysis are similar for any liquid present in water tank but is should be crack free to avoid leakage

scholarly journals Vibration Control of Water Tank Staging Equipped X-plate Damper

2019 ◽  
Vol 8 (4) ◽  
pp. 5551-5554
Keyword(s):  
Time History ◽  
Water Tank ◽  
Seismic Behaviour ◽  
Effective Technique ◽  
Linear Dynamic ◽  
Dissipation Of Energy ◽  
History Analysis ◽  
Steel Damper ◽  
Elevated Water ◽  
Water Tanks

During post-earthquake requirement the staging of elevated water tanks are considered as essential structures. Failure of staging leads to collapse of watertank so required to control the vibration of staging. In This paper elevated circular tank supported with frame was modeled to control the vibration of staging. Non-linear dynamic analysis (time-history analysis) was performed on model by using SAP2000 software to study the seismic behaviour. The additional dissipation of energy occurs by using damper constitute an effective technique for the earthquake reduction of staging members and In this study an attempt has been made to use the X-plate metallic steel damper for reducing the seismic response.

scholarly journals Diversification of water supply

2018 ◽  
Vol 59 ◽  
pp. 00006
Author(s):  
Janusz Rak ◽  
Krzysztof Boryczko
Keyword(s):  
Water Supply ◽  
Water Demand ◽  
Water Supply Systems ◽  
Water Production ◽  
Total Water ◽  
Parameter Evaluation ◽  
Technical Structure ◽  
The Subject ◽  
Water Tanks ◽  
Supply Systems

The subject of the publication is the presentation of a methodology for determining the degree of diversification of water resources in collective water supply systems (= CWSS). Knowing the number of subsystems for water supply and their share of total water production, it is possible to calculate the dimensionless Pielou index. Similarly, the diversification indicators for networked water tanks (number and volume) and pressure pipelines of the second degree pumping station (number and flowability) can be determined. The work presents the calculation of diversification indices for selected CWSS in Poland. The presented methodology gives the possibility of three-parameter evaluation of settlement units with different water demand and different technical structure.

Длительная защита и гидроизоляция резервуаров питьевой воды из сборного железобетона

2020 ◽  
Author(s):  
E. Pomazkin
Keyword(s):  
Drinking Water ◽  
Reinforced Concrete ◽  
Water Supply ◽  
Precast Concrete ◽  
Protective Layer ◽  
Drinking Water Supply ◽  
Water Supply Systems ◽  
Toxic Substances ◽  
Wall Panels ◽  
Water Tanks

Для возведения резервуаров питьевой воды наиболее часто используют железобетон, который имеет существенные преимущества по сравнению с другими материалами: экологичность (монолитный и сборный железобетон не выделяет в воду токсичные вещества) долговечность (при грамотной эксплуатации резервуары из железобетона надежно служат не менее 100 лет с сохранением эксплуатационных свойств) возможность возведения резервуаров разного объема и различной формы доступная стоимость. Приведен вариант ремонта и гидроизоляции резервуаров воды из сборного железобетона в системе хозяйственно-питьевого водоснабжения при наличии дефектных участков. К таким дефектам относятся: разрушение защитного слоя бетона с оголением арматуры, нарушение гидроизоляции примыканий стеновых панелей к фундаменту, статичных стыков между стеновыми панелями, примыканий стеновых панелей к ребристым плитам покрытия. Ремонт и гидроизоляция осуществляются с помощью материалов системы Пенетрон и Скрепа , которые имеют необходимые разрешения для применения в системе хозяйственно-питьевого водоснабжения.For the construction of drinking water tanks reinforced concrete is most often used that has significant advantages compared to other materials, e.g. environmental friendliness (monolithic and precast concrete does not release toxic substances into water) durability (with proper operation, tanks made of reinforced concrete reliably serve at least 100 years while maintaining operational properties) the possibility of building tanks of different capacity and shape affordable cost. The option of repair and waterproofing of prefabricated reinforced concrete water tanks in a drinking water supply system in the presence of defective areas is given. Such defects include: destruction of the protective layer of concrete with reinforcement baring, damage of the waterproofing of the wall panels adjoining the foundation, static joints between wall panels, wall panels adjoining ribbed floor slabs. Repair and waterproofing are carried out using Penetron and Skrepa materials that have the required permissions for being used in drinking water supply systems.

scholarly journals Analysis of Circular Elevated Service Reservoir Using STAAD Pro by Considering the Effect of Continuity

2021 ◽  
Vol 11 (4) ◽  
pp. 2603-2615
Author(s):  
Priyanka M. Mankar ◽  
H.R. Nikhade ◽  
Er. Minal Dehadrai ◽  
Khalid Ansari
Keyword(s):  
Seismic Analysis ◽  
Water Tank ◽  
Practical Application ◽  
Wind Analysis ◽  
The Common ◽  
Elevated Water ◽  
Water Tanks ◽  
Early Damage ◽  
Economical Losses ◽  
Continuity Analysis

In most regions of the country, early damage of elevated water tanks during their service life is becoming an increasing concern. The majority of damage occurs in tanks due to a lack of knowledge in design and ignoring continuity effect. Elevated water tank are used for storage of water at certain height and supplying water for essential usage. Hence damage of such structure endanger supply of drinking water and severe economical losses. The main purpose of this research is to determine the importance of continuity analysis in practical application and use of staadpro software to analyse an elevated circular water tank. The bottom joint of water tank is examined using continuity effect. This is the common joint where base slab, wall, bottom rings beam, gallery, column and base beam join. water tank is subjected to self-weight and hydrostatic Pressure due to water. Continuity effect increase stress, Hoop tension, BM hence its necessary to consider its effect while designing the tank. The results obtained from staadpro software is nearly same with manual result. This indicated that staadpro is suitable for design and analysis of water tanks. Three model having capacity of 55 m3, 125 m3 and 221 m3 situated in yavatmal, buldana and ramtek district is taken for analysis. Seismic analysis and wind analysis is also carried out on this model for safety purpose.

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