ground‚ resting on flexible bearings or pads known as base isolators. It is of the most popular means of protecting a structure against earthquake forces. HISTORY The first evidence of architects using the principle of base isolation for earthquake protection was discovered in Pasargadae. One of the world’s first base-isolated structures – the William Clayton building Base Isolation System Major types of base isolator systems High damping rubber bearings Elastomeric based Isolator
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Airoli‚ New Mumbai- 400 708 Abstract: The Base Isolation is one of the passive control techniques to reduce the earthquake effect on the structure up to negligible level. Base isolation system are‚ Elastomeric Bearing‚ Sliding Isolation System and Combined Systems. Elastomeric bearing has a problem of tearing of rubber under severe earthquake. Sliding isolation system consists of deflecting the earthquake energy by incorporating flexible device between foundation and super structure. In combined
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York: Wiley In this book‚ Terzaghi introduces the idea of bearing capacities‚ the critical load over a given area which a soil takes to fail. The concept of bearing capacities became fundamental in determining the ultimate load which can be taken. Once a soil is pushed beyond its elastic region‚ it undergoes plastic deformation and fails after a given settlement. Terzaghi developed a simple equation which calculated the ultimate bearing capacity of a soil which was dependent on the soils’ properties
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Law of Conservation of Energy says that energy can only be transferred or transformed and we release the ball bearing at it’s max Potential Energy‚ then the Potential Energy will transform into Kinetic Energy as the bearing travels through the track. IV.Materials 2 Four feet long pieces of insulation tubing 1 Ball bearing (mass=0.01kg) Film Canister (to catch ball bearing) Masking tape (1meter) Meter stick V.Procedure First‚ we planned out how we’ll build the
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maintenance of bearings. I believe that we all know the bearings plays the role of the aorta‚ and operates under the full load when the machine is running. So let the bearings with good lubrication has a direct relation to the life of the cone crusher. If you want the bearings with good lubrication‚ you must inject clean and well sealed lubricating oil. Where is the best places to inject the oil? There are four places: (1) rotating bearing; (2) roller bearing; (3) gears; (4)activities bearing‚ sliding
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situations the four components of the rig satisfied static balance and dynamic balance. By applying forces balancing equation and vector diagram obtain that‚ when M 1 at bearing 90°‚ M2 at 0°‚ M3 at 197°and M4 at 261.5°static balance archived. For archiving dynamic balancing‚ M1‚ M2‚ M3 and M4 need to stay with the same bearing‚ but also need to have the length of 6.45cm‚ 15.45cm‚ 17.25cm and 3cm respectively from one end of the scale. Introduction An object that imparts a
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that if you try to connect magnets they are not going to work because it is like tow volcanos trying to be in the same place. “What is a Ball-bearing?”
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instance‚ solid lubricants may be sprayed on the outer hull of a boat to avoid water contact. Greases: Greases are solid or semisolid lubricants and generally consist of soaps‚ mineral oil‚ and various additives. Greases mostly used in roller bearing and low velocity applications due to high viscosity and sticky property to
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Topic 4 Traverse Survey LEARNING OUTCOMES By the end of this topic‚ you should be able to: 1. 2. 3. 4. 5. Outline the basic components of a theodolite; Carry out temporary adjustments of a theodolite; Compute and adjust a theodolite traverse; Compute coordinates for traversing; and Determine the nature of errors affecting the traverse work. INTRODUCTION Traversing is a form of a control survey that requires the establishment of a series of stations that are linked together by angles
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Heartland & Company 1. What are the advantages of basing a supplier’s overall evaluation on its lowest performance on one of the five dimensions (Quality‚ Delivery‚ Cost Management‚ Technical Support‚ and Wavelength)? What are the disadvantages? Overall‚ do you think that basing a supplier’s overall evaluation on its lowest performance on one dimension is a good idea or not? Why or why not? There are a couple advantages of basing a supplier’s overall evaluation on its lowest performance measure
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