StudentShare solutions

# Structural Stability Statement - Essay Example

## Extract of sampleStructural Stability Statement

The structure is complemented by accurate monitoring of the real forces (in deck, pylon and stays) and movement.
The single pylon inclines away from the river, and supports the 200m span with thirteen pairs of cables. As Alexander Tzonis explains," Rather than use back stays, Calatrava allowed the weight of the concrete-filled steel pylon to counterbalance the deck. By substituting one set of stay cables with the weight of the pylon inclined at 58 degrees, he created a new kind of cable-stayed bridge" (114). These cables connect the road deck to the pylon and remain in tension transferring the load to the pylon which in turn transfers it to the ground
The subsequent reactions are generated which are in larger magnitude near the base of the pylon and in considerable low magnitude at the opposite end. The chief loads that are generated are resultant of the dead loads of the bridge and with some effect from the live loads of the moving vehicles.
The weight of the concrete and steel pylon provides a counterbalance for the bridge deck. The single plane of cables supports a beam down the middle of the road, maintaining the bridge's image of a harp. The roadway itself is cantilevered out from the beam with no support provided at the bottom of the bridge.

The central beam is made out of steel box and it experiences concentrated loads at an interval of twelve meters at the junctions of the elastic directional support.

With less than 5 meters of distance between every pair, across the 32 m wide bridge, the cable cannot take any load by adjusting the axial force on each cable. Thus the torsional load generated from the live load is withstood by the torsional strength of the steel box.

The pylon is loaded with its dead weight and the forces of the cable stays and with its own weight. The resultant of those two forces is inclined and the force is transferred through the pylon. However under the conditions of live loading of by the vehicular movements over the deck, the axial forces acting though the cables change in its magnitude and ultimately resulting in creation of a bending moment in the pylon.

The external loads of any structure are transferred to the foundation. Equilibrium under changing loading conditions is reacted by developing the needed reaction forces at the supports. The Alamillo Bridge relies on a single support at the foundation of the pylon to withstand any loading changes.
Varying loading conditions resulting from the live load and wind load are expected to change the magnitude of the axial forces of the cable stays, thus creating eccentricities that caused bending moments at the foundations of the pylon in all directions. Furthermore transverse loading of the pylon will cause bending moments in the other direction - in the same direction as the torsional moment that the steel box carries to the foundation. The pylon foundation then, should constrain all six degrees of freedom, countering reaction forces and moments that are expected to be quite large. Furthermore a strong vertical support is needed for the weight of the pylon and the vertical loads along the steel box, transferred throu ...Show more

## Summary

The paper discusses the structure of the Alamillo Bridge and its action under various loading conditions. The bridge is one of the long-span bridges crossing the Guadalquivir River built on the occasion of Expo '92 held in 1992 in Seville (Spain). It is a cable-stayed structure spanning 200 m without any intermediate supports, and its originality is in the lack of back stays and the balancing of the front stays through the backward inclination of a massive pylon…
Author : dayanaraynor
Save Your Time for More Important Things
Let us write or edit the essay on your topic
"Structural Stability Statement Essay"
with a personal 20% discount.
Grab the best paper

### Related Essays

This essay is for my structural engineering class
It is conventionally thought that structural materials have limited strength. Therefore, too much increase in the height of a structure may put unbearable pressure on the materials used particularly on the lower stories. Steel is one of the most fundamental materials that are commonly employed in the construction of skyscrapers.
2 pages (500 words) Essay
It can be comprehended as an effort made by the International Monetary Fund, the World Bank as well as the Organization for Economic Co-operation and Development (OECD) member countries to alter their economies in significant ways. It is worthy of noticing the fact that the concept of structural adjustment is quite closely related to the issue of debt as it is viewed as an influential international actor.
3 pages (750 words) Essay
Purpose Statement Essay
The greatest concern to the society is the increase of the dilemma as more youths get involved in unproductive and unethical activities like drug and substance abuse. This time round, the youths are topping the chart for the wrong reason. In the recent years, more college-going girls and boys were hauled up by the police for involving in cases of drug use in rave parties.
3 pages (750 words) Essay
Structural Stability Statement
Designed by engineer Gustav Eiffel, the tower is an assembly of various wrought iron members which are put together with the help of rivets. The form notably tapers as the tower moves away from the ground. The structure consists of two visibly distinct parts: a base composed of a platform resting on four separate supports (called pylons or bents) it is a sort of bar stool, very sturdy, standing on 4 main pillars that are bonded and extended with a much lighter batter at the smaller level that constitutes the second floor, above this, a slender tower created as the bents taper upward, rising above a second platform to merge in a unified column.
6 pages (1500 words) Essay
Financial Statement Essay
Tax benefits through stock options are therefore the second biggest source of generating cash flows from operating activities after the increase in the other liabilities. Account payables also increased showing not only
2 pages (500 words) Essay
This essay is for my structural engineering class
Steel is one of the most fundamental materials that are commonly employed in the construction of skyscrapers. Steel can support structures of height about 6.2 miles or even more than that, whereas advanced
2 pages (500 words) Essay
STRUCTURAL ASSESSMENT
This phase is important for the structural stability and to ensure the safe design implementation and this inspection will also affect the life of the structure because mistakes made at this stage can be corrected on spot but after the facility is complete then the
6 pages (1500 words) Essay
Flight Stability
Sensitive control systems have been designed in aeroplanes to facilitate tight motion sensor systems that aid detection and correction of
7 pages (1750 words) Essay
problem” for political society is how to find a form of association which will defend the person and goods of each member with the collective force of all, and under which each individual, while uniting himself with the others, obeys no one but himself, and remains as free as
5 pages (1250 words) Essay
Statement of Career Goals Essay
My career goal goes beyond mere acquisition of academic qualification but explores the practical approach in the context of daily life. I have always learnt that talent can take me far but I need personal
1 pages (250 words) Essay
Get a custom paper written
by a pro under your requirements!
Win a special DISCOUNT!
Put in your e-mail and click the button with your lucky finger