Design Process and Appraisal Essay Example | Topics and Well Written Essays - 2000 words

Design Process and Appraisal - Essay ExampleMaterials The original yoke was constructed from granite stones hardly the in the second bridge latest technology at that time was use and concrete beams and slabs were used along with concrete piers for the construction. Along with the reinforced concrete the architectural work is done by greyish Cornish granite and Portland Stone. Opinion about the design The use of reinforced concrete beams under the footways and the road support by slabs is a very good design by strength point of view and if we consider the aesthetics and the building heritage of London the original design of the bridge should have been continue by using arches. This would also have eliminated the need of the cantilevers which are present now. The design calls for supporting beams scarcely at the outside edges, which is actually a very good feature as it lets light write in code the underside of the bridge which makes it very pleasant for the river traffic. To gua rd against the possibility of subsidence from scour the piers are attached jacks which can be used to level the structure. The architecture of the bridge is also important and in order to preserve the building architecture of London various stones, mainly the Portland stone has been used in cladding. Millennium straddle Type of Bridge Steel Suspension Bridge Purpose To facilitate pedestrians crossover river Thames in London Age 9 years Dimensions The width of the bridge is 4 meters (13 ft) and the issue forth duration is 325 meters (1066 ft). It can support 5000 people on it at a time. Materials The Millennium Bridge is mainly constructed of poise with steel cables and steel armatures. The transverse arms are also made of steel while the ditch of the bridge is made of aluminium as it is a very light metal and the use of aluminum in the blast has reduced the load on the armatures and cables. Opinion about the design The design of the millennium bridge is basically steel susp ension design which initially posed some problems and the bridge was finally closed just after 2 days of its 1st opening imputable the intense vibrations due to resonance. But the corrections were made later during a period of 2 years. The use of aluminum dramatise is the best feature of the design in my opinion because since it is a pedestrian bridge the strength of the lard is not an issue here so in order to make the design cost competent and sustainable the loads on the cables and armature have been lessened by the use of aluminum in the deck which is a very light material as compared to steel or concrete. Moreover while innovation a bridge entirely of metallic structure proper considerations should be given to the design as the modifications are very difficult and costly in nature as the case of the millennium bridge tells in which the bridge was closed for 2 years and an additional cost of 5 million pounds was played out on the modifications. Tower Bridge Type of Bridge B ascule and suspension bridge Purpose Tower Bridge is basically a road bridge for usual traffic Age 116 years 7 months Dimensions The total length is 286.5 meters. The two side-spans are suspension bridges, each 270feet (82m) long. The pedestrian walkways are 143feet (44m) above the river at proud tide. Materials The towers are made of steel whi