Analysis and Design of Cable Stayed Bridge Essays

Investigation and Design of Cable Stayed Bridge Essays Investigation and Design of Cable Stayed Bridge Essay Investigation and Design of Cable Stayed Bridge Essay Of the recently fabricated Bridgess, link stayed Bridgess are today extremely normal worldwide for ranges runing somewhere in the range of 200 and 900 meters. An abroad wire stayed range has at least one towers ( Pylons ) from which the abroad wires bolster the deck. This paper gives displaying, investigation and plan of a prestressed harp type singular arch abroad wire stayed range using MIDAS Civil. Watchwords: abroad wire stayed, box support, prestressing, MIDAS Civil Introduction Of the recently assembled Bridgess, link stayed Bridgess are today extremely basic worldwide for ranges runing somewhere in the range of 200 and 900 meters. An abroad wire stayed range has at least one towers ( Pylons ) from which the abroad messages bolster the deck. There are two significant classes of link stayed Bridgess: harp and fan.In the harp structure, the abroad wires are about equal with the goal that the stature of their affectionate respect to the pinnacle is like the good ways from the pinnacle to their hop on the deck.In the fan plan, the abroad wires all interface with or base on balls over the highest point of the towers. The link stayed range is ideal for ranges longer than cantilever Bridgess, and shorter than suspension Bridgess. This is the degree where cantilever Bridgess would rapidly go heavier if the range was protracted, and suspension length broadcasting would non be progressively affordable if the range was abbreviated Cable-stayed Bridgess may appear to be like suspension Bridgess, however in reality they are fairly unique in rule and in their structure. In suspension Bridgess, large boss abroad wires ( typically 2 ) twisted between the towers ( generally 2 ) , and are tied down at every terminal to the land though in the link stayed length, the towers are the essential supporting developments which transmitt the range burdens to the land. A cantilever assault is much of the time used to back up the range deck close to the towers, however lengths farther from them are bolstered by abroad wires running directly to the towers. General introduction of the development The range is an individual arch abroad message stayed length holding a harp-type understanding of the abroad wires. The whole length of the abroad message stayed range is 700m with a main range of 350m. The range development conveys 6 course paths partitioned into 2 carriageways. The deck comprises of players in topographic point prestressed box braces Whole expansiveness of the range is 29.8m. Development system The boss 350 m range will be constructed using the cantilever technique, get bringing down from the wharfs P4 A ; P5 simultaneously. The two cantilevers will be associated at mid range by the mean of a fasten segment. The decent cantilevers are thrown by areas of 3.5 m long, using a signifier voyager. The area ( n ) is associated with old segment ( n-1 ) by ligaments ( interior pre-focusing on ) . This strategy is utilized for the initial 10 areas from arch. After eleventh area, no cantilever ligament is required as the segments will be bolstered by remain abroad messages tensioned progressively with working of areas. Henceforth constructing musicality of areas after eleventh one incorporates introducing and tensioning of remain abroad wire before remotion and propelling of signifier explorer. Material highlights: Concrete: M50 grade solid will be utilized for deck and arches. M50 grade solid will be utilized for Piers. Concrete belongingss will be founded on AASHTO LRFD Bridge Design Specifications. Youthful modulus according to IRC codification is given in the accompanying plain exhibit ( IRC:21  § 303.1. ) : Shear modulus of solid, G, is determined using the undermentioned condition: E= Ec/2 ( 1+? ) The coefficient of thermic extension and withdrawal for typical weight concrete is taken as 1.17?10-5/ °C. Thickness of the pre-focused on concrete is taken equivalent to 25 KN/m3. Steel support: Thermo-precisely rewarded help bars of class 414 complying with IS:1786 will be embraced. Yielding quality of inert steel support is viewed as equivalent to 414 MPa and Young modulus equivalent to 200 000 Mpa. Measured proportion among cement and steel will be taken equivalent to 10. Dead tonss: oneself weight is determined assuming a thickness of 25 KN/m3 for fortified and prestressed concrete. A thickness of 7.85 t/m3 is to be considered for steel. Live Tonss: Traffic live loads-The unrecorded tonss are in similarity with IRC:6-2000. The range has two carriageways of three paths each and of 11 m broadness. Every carriageway will be stacked with three paths of IRC classification A weight. Person on foot unrecorded weight ( PLL ) The pes way filling will be according to provision 209 of IRC:6 with quality of replenishing equivalent to 500 kg/m? . Wind trouble for abroad wire stayed range: Harmonizing to IS:875 ( partition 3 ) - 1987 Wind stacks on unrecorded tonss ( WL ) The sidelong air current power against voyaging unrecorded tonss will be considered as moving at 1.5 m over the roadway and will be accepted equivalent to 300 kg/m. Creep and Shrinkage ( C A ; S ) Creep and contracting impacts to be considered according to CEB-FIP codification for abroad message stayed length Earthquake tonss Rajasthan is situated in seismal zone II. The flat seismal coefficient in longitudinal manner will be determined by IS 1893:2002 Construction tonss: Normal opposite burdens A structure weight of 50 kg/m2 will be considered during cantilever hard-on. Weight of the explorer signifier is thought to be equivalent to 85 dozenss. An effect of 10 % will be considered for the voyaging bui lding tonss. MIDAS MODEL of box: ( Half range ) AASHTO LRFD Bridge Design Specifications ( Third Edition, 2005 Interim Revisions ) ; AASHTO †Guide Specifications for Seismic Isolation Design ( second release †2000 ) ; AASHTO †Guide Specifications for Design A ; Construction of Segmental Concrete Bridges ( 1999 ) ; IRC:6-2000 Standard Specifications A ; Code of Practice for Road Bridges, Section II, Loads A ; emphasiss ( fourth version †2000 ) ; for meaning of the unrecorded tonss and quake tonss simply ; IS:875 ( divide 3 ) - 1987 Code of example for structure tonss ( other than earthquake ) for buildings and developments ; for air current loads only ; Necessities of Bridge innovation by D.Johnson Victor Scaffold Engineering Handbook Edited by Wai-Fah Chen, Lian Duan, CRC Press