Preview

Damper

Good Essays
Open Document
Open Document
408 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Damper
I. The first structure element of Taipei 101 is its tuned mass damper.
As we know, earthquake and typhoon always occur in Taipei [Video presentation: effect of earthquake]. On 12 May 2008 a province in China experienced an earthquake which the tremors to be felt in Taiwan. So what is the best way to protect the skyscraper from collapse when the disasters occur? As skyscraper Taipei 101 installs the tuned mass damper insert the building on at level 87th to 91th. A. To ensure the tuned mass damper can be use in longest period time, the suitable materials are selected. 1. The tuned mass damper consists of 41 circular steel plates each with height of 12.5cm welded together to form a 5.5m diameter sphere which weight 730 tons [Picture slide show presentation of tuned mass damper].

2. According to Kourakis (2005), massive wire cables is used to support the tuned mass damper become like pendulum.

3. According to Kelleher (n.d), the eight massive steel cables are acting like conventional spring to support the tuned mass damper and it also support by eight hydraulics to support at high amplitudes of oscillation. [Video presentation : how tuned mass damper work]

B. Tuned mass damper carries out the main function of avoiding Taipei 101 from collapse. 1. Tuned mass damper function when Taipei 101 hits by wind load and face earthquake by carry some responsibility, such as, to cut the vibration that hit Taipei 101 around 40%.

2. When Taipei 101 can face the typhoons and vibration from earthquake, by absorb this vibration then transmit it to the 8 hydraulic pistons to balancing it.

Listener relevance: By knowing the tuned mass damper, we can understand that the important of tuned mass damper for the skyscraper, to maintain the building from collapse and as attraction to the people. Although, the tuned mass damper need large space to install, but, it is very economical solution that can be used to absorb the vibration, by compare to the



References: 1. Venture,J (September 2007).Taipei 101 Project Review & Management. 2. Kelleher,W (n.d). TUNED MASS DAMPERS: STABLILIZING OUR STRUCTURES 3. Kourakis,I (2005). Structural Systems and Tuned Mass Dampers Of Super-Tall Buildings: Case Study Of Taipei 101

You May Also Find These Documents Helpful

  • Satisfactory Essays

    AP Physics Slinky Lab

    • 468 Words
    • 4 Pages

    1. The first slinky’s mass was weighed, using a scale, and its tension was measured using a…

    • 468 Words
    • 4 Pages
    Satisfactory Essays
  • Satisfactory Essays

    Report1

    • 274 Words
    • 1 Page

    counterweight is parked at the minimum distance while the outer one is mobile, and double trolley where both counterweights move together.…

    • 274 Words
    • 1 Page
    Satisfactory Essays
  • Good Essays

    9/11, 2001: A Case Study

    • 635 Words
    • 3 Pages

    These forces pulled the perimeter columns inward reducing their ability to support the building above (NIST, 2011). These columns and neighboring columns quickly became overloaded by the added stress and damage and buckled. After the perimeter columns bulked the top sections of the buildings tilted and the buildings began their decent.…

    • 635 Words
    • 3 Pages
    Good Essays
  • Good Essays

    Wtc 7

    • 824 Words
    • 4 Pages

    Please describe: (a) the structural frame of WTC 7, and (b) how major loads were transferred in WTC 7. (10 point)…

    • 824 Words
    • 4 Pages
    Good Essays
  • Satisfactory Essays

    Pulleys were used in this experiment to allow the center ring to hover over the middle and thus allowing a more accurate of what angles and weights would be needed to determine equilibrium. If the strings had simply been run over the edge of the force table, it would have been hard to determine whether or not the center ring was balanced or if it was stuck on the table.…

    • 542 Words
    • 3 Pages
    Satisfactory Essays
  • Good Essays

    Even with the city of Los Angeles have strong structured building to deal with the harms and hazards that come with having earthquakes. Many would call these structures earthquake resistant. According to building codes, earthquake-resistant structures are projected to endure the largest earthquake of a certain chance that is likely to occur at their location. This means the loss of life should be decrease by averting collapse of the buildings for rare earthquakes while the loss of functionality should be limited for more frequent ones.…

    • 799 Words
    • 4 Pages
    Good Essays
  • Satisfactory Essays

    1. Determine the spring constant, k, of Spring 1, by using Hooke’s Law. Take three different measurements (since 3 masses) and do three calculations and average your k’s to get a more accurate answer. By applying lots of friction, you will be able to get your mass to hang still. Show a table of your data and your calculations of k.…

    • 402 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    On the morning of January 17th, many were sleeping peacefully. Earthquake analysists were aware of tremors happening, too small though to even to be noticed. On average there are five tremors exceeding 1.5 on the Richter…

    • 589 Words
    • 3 Pages
    Good Essays
  • Good Essays

    Certainly, building codes implemented in Japan were effective, consequently there were many other mitigation opportunities missed. While there had not been a recent earthquake in this location, past history had shown that this area was susceptible to strong earth movements as recently as the…

    • 379 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Math Solutions

    • 406 Words
    • 2 Pages

    With the Tacoma Bridge there were two different mechanisms involved in its collapse. “The first mechanism was the one responsible for the initial, relatively weak vibrations, and it involved resonance. As the wind moved over the bridge, it began acting like a kite or an airplane wing…The bridge [however] was probably destroyed by a different mechanism, in which its vibrations at its own natural frequency of 0.2 Hz set up an alternating pattern of wind gusts in the air immediately around it, which then increased the amplitude of the bridge's vibrations. This vicious cycle fed upon itself, increasing the amplitude of the vibrations until the bridge finally collapsed.” (Crowell)…

    • 406 Words
    • 2 Pages
    Good Essays
  • Satisfactory Essays

    haiti vs japan

    • 496 Words
    • 2 Pages

    Level of preparation was also diverse. Japan has a history of frequent seismic activity and was more or less structurally prepared for an earthquake. The country has strict construction…

    • 496 Words
    • 2 Pages
    Satisfactory Essays
  • Powerful Essays

    1. Introduction Smart systems for civil structures are described as systems that can automatically adjust structural characteristics in response to external disturbances and/or unexpected severe loading toward structural safety, extension of the structure’s life time, and serviceability [26]. One key technology toward this goal is the development and…

    • 6218 Words
    • 25 Pages
    Powerful Essays
  • Powerful Essays

    Half Car Vehicle System

    • 14752 Words
    • 60 Pages

    Magneto Rheological Dampers”, Thesis submitted to the faculty of Virginia Polytechnic Institute and State University, September 23, 2002.…

    • 14752 Words
    • 60 Pages
    Powerful Essays
  • Satisfactory Essays

    Control System Assignment

    • 386 Words
    • 2 Pages

    In many mechanical positioning systems, the movement of a large unwieldy object is controlled by manipulating a much smaller object that is mechanically coupled with it. The figure below depicts such a situation, where a force u is applied to a small mass ms in order to position a larger mass mb. The coupling between the objects is modeled by a spring constant k with a damping coefficient b. Denote x and y to be the displacements of the small and large masses…

    • 386 Words
    • 2 Pages
    Satisfactory Essays
  • Good Essays

    The first thing to be explored to control vibrations is to try to alter the source so that it produces less vibration. This method may not always be feasible. Some examples of the sources of vibration that cannot be altered are earthquake excitation, atmospheric turbulence, road roughness, and engine combustion instability. On the other hand, certain sources such as unbalance in rotating or reciprocating machines can be altered to reduce the vibrations. This can be achieved, usually, by using either internal balancing or an increase in the precision of machine elements. The use of close tolerances and better surface finish for machine parts (which have relative motion with respect to one another) make the machine less susceptible to vibration. Of course, there may be economic and manufacturing constraints on the degree of balancing that can be achieved or the precision with which the machine parts can be made. The presence of an eccentric or unbalanced mass in a rotating disc causes vibration, which may be acceptable up to a certain level. If the vibration caused by an unbalanced mass is not acceptable, it can be eliminated either by removing the eccentric mass or by adding an equal mass in such a position that it cancels the effect of the unbalance. In order to use this procedure, we need to determine the amount and location of the eccentric mass experimentally. The unbalance in practical machines can be attributed to such irregularities as machining errors and variations in sizes of bolts, nuts, rivets, and welds. In this section, we shall consider two types of balancing:…

    • 521 Words
    • 3 Pages
    Good Essays