The Damage Analysis And Strengthening Research Of Bayi Bridge

Back in the 1950s and 1960s, China built many T-beam bridge, as simple structure, ease of installation, and other characteristics, the type of the bridge to improve road traffic in China has played an important role. However, as the development of transport, traffic volume increasing, the increasing load of vehicles, as well as the increase in life as carriers, T-beam also exposed some problems, because WING PLATES high beam thickness is much smaller than that if Articulated consider horizontal beam connection, as WING PLATES connecting the structure of the beam height and high much difference, the role hinged be very difficult to achieve and does not provide adequate lateral links, resulting in damage to the connecting WING PLATES; by has just consider the horizontal beam connected, and if the number of beams not installed, do not form a horizontal rigid connection, the actual state of the theory inconsistent with the will of a single beam by too much damage, when their resistance is weak beam, but also bear more vulnerable because of the lateral bending of the role of damage to a bridge carrying capacity reduced with each passing year. Especially before the construction of the bridge, lower design standards, the development of transport capacity has been unable to meet the needs and reinforced concrete T-beam bridge with the use of the growth period, and the conservation of not timely, there will be natural carbonation of concrete surface, Cracks up, the surface broken, rainwater intrusion, a series of issues such as steel corrosion, the bridge will eventually lead to decreased capacity, a disease, a disease Bridge, Bridge, or even serious bridge collapsed, to a certain extent, this has hampered the national economy development.In this paper, The author has looked up large amount of information, has been aware of what be studied the field home and abroad studies situation. Here takes the Bayi bridge of Xiao Gan City as project background on the basis, carry out analysis and their strengthening on the disease that exists in the bridge studies.the auther has been in progress mainly working as follows:1. The primo pushes down the design load that reckoning checking calculation main beam bears, analyses the main cause owing a bridge rift creation, and brings forward two kinds possible strengthening schemes by traditional method; Scheme one:Transverse diaphragm scheme, the replacement being in progress to damaging transverse diaphragm, correct problematic reinforced bar of welding quality steel plate repairing welding Scheme two:The scheme chisels the bridge face ply except that original bridge floor shop installing, arranging the reinforced bar net again deposit thickness of 15 cms concrete now, make up into the dyadic overall bridge face ply, plant certan steel by certain spacing extremely on the top of the T-shape beams, the reinforced bar with bridge face ply welds feasible bridge face ply and main beam accept a force, harmonize deformation commonly.2. Making use of the finite element software of Ansys specifically for three kinds schemes building a model respectively, location carrying out mechanics on main structure of bridge; The analysis secretly scheming against indicates vehicle, the bridge is in under simple armoured concrete branch T-shape beamsbridge condition satisfying call for in main beam load support capability, in overloading a vehicle leading to T beam wing predestined relationship board under the effect have pulled strain preparing every T beam greatly transversely after bridge floor direction rift creation is main since being hit by transverse diaphragm destroying be loaded with effect lower deformation out of tune.3. Calculation bear fruit carries out contrast on the both, consolidates and then design take this as the basis carry out a bridge; Finally indicate a technology, adopt to establish a tendon, the scheme changing the bridge floor laying the baffle plate holding tier of strengthening schemes with and consolidating a horizontal stroke exclusively is compared with each other, not only, the former more excellent, goes to the lavatory at the same time more on Mechanics index to be under construction, also more economical reasonableness.This paper has some guide with the reforming design to old bridge and construction.