Analysis and Design of Cable Stayed Bridge Essays

Examination and Design of Cable Stayed Bridge Essays Examination and Design of Cable Stayed Bridge Essay Examination and Design of Cable Stayed Bridge Essay Of the recently constructed Bridgess, link stayed Bridgess are today extremely regular worldwide for ranges runing somewhere in the range of 200 and 900 meters. An abroad wire stayed length has at least one towers ( Pylons ) from which the abroad wires bolster the deck. This paper gives displaying, investigation and structure of a prestressed harp type singular arch abroad message stayed range using MIDAS Civil. Watchwords: abroad wire stayed, box support, prestressing, MIDAS Civil Introduction Of the recently fabricated Bridgess, link stayed Bridgess are today extremely basic worldwide for ranges runing somewhere in the range of 200 and 900 meters. An abroad message stayed length has at least one towers ( Pylons ) from which the abroad wires bolster the deck. There are two significant classifications of link stayed Bridgess: harp and fan.In the harp plan, 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 get on the deck.In the fan structure, the abroad wires all associate 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 transmitting would non be increasingly affordable if the range was abbreviated Cable-stayed Bridgess may appear to be like suspension Bridgess, yet in actuality they are fairly unique in rule and in their structure. In suspension Bridgess, huge boss abroad messages ( normally 2 ) twisted between the towers ( typically 2 ) , and are secured at every terminal to the land while in the link stayed range, the towers are the essential supporting developments which transmitt the range burdens to the land. A cantilever assault is every now and again used to back up the range deck close to the towers, yet lengths farther from them are upheld by abroad wires running directly to the towers. General introduction of the development The range is an individual arch abroad wire stayed length holding a harp-type understanding of the abroad wires. The whole length of the abroad wire stayed range is 700m with a main range of 350m. The range development conveys 6 course paths separated into 2 carriageways. The deck comprises of actors in topographic point prestressed box braces Whole expansiveness of the range is 29.8m. Development system The boss 350 m range will be manufactured 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 area. The fair cantilevers are thrown by segments of 3.5 m long, using a signifier voyager. The area ( n ) is associated with old segment ( n-1 ) by ligaments ( inward pre-focusing on ) . This strategy is utilized for the initial 10 areas from arch. After eleventh segment, no cantilever ligament is required as the areas will be bolstered by remain abroad messages tensioned progressively with working of segments. Subsequently constructing beat of segments after eleventh one incorporates introducing and tensioning of remain abroad message before remotion and propelling of signifier voyager. 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 augmentation and constriction for ordinary 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 adjusting to IS:1786 will be embraced. Yielding quality of latent steel support is viewed as equivalent to 414 MPa and Young modulus equivalent to 200 000 Mpa. Secluded 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 congruity 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 class A weight. Passerby unrecorded weight ( PLL ) The pes way filling will be according to condition 209 of IRC:6 with quality of replenishing equivalent to 500 kg/m? . Wind trouble for abroad message stayed length: Harmonizing to IS:875 ( divide 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 expected 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 wire 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 voyager signifier is thought to be equivalent to 85 dozenss. An effect of 10 % will be considered for the voyaging building ton ss. MIDAS MODEL of box: ( Half range ) AASHTO LRFD Bridge Design Specifications ( Third Edition, 2005 Interim Revisions ) ; AASHTO †Guide Specifications for Seismic Isolation Design ( second version †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 release †2000 ) ; for meaning of the unrecorded tonss and quake tonss simply ; IS:875 ( partition 3 ) - 1987 Code of example for plan tonss ( other than earthquake ) for structures and developments ; for air current loads just ; Necessities of Bridge innovation by D.Johnson Victor Extension Engineering Handbook Edited by Wai-Fah Chen, Lian Duan, CRC Press