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Hollow slab bridge structure has the advantages of simple structure, the force is clear , convenient construction , widely used in roads and bridges . With the progress of the bridge design and construction technology , this bridge type long associated light development , this has made some economic advantages , but it also brings some problems . But in the actual project , also appeared in a large number of disease phenomena , such as longitudinal cracks , bridge deck cracking , expansion joints, fracture bearing damage . Guangxi Zhuang Autonomous Region the Tieshan'gang Bridge , for example , the investigation of the Bridge emergence of many diseases , summarize , and then for the disease were analyzed to identify the root causes of disease , and similar bridge design theory reference . (1 ) Bridge Tieshan'gang thorough, detailed and comprehensive investigation of the scene , to grasp the characteristics of the bridge main diseases , to avoid the emergence of collapsed bridges , destroyed the bridge provided the first accident , bridge maintenance work and Retrofitting hand information ; (3) simply supported - continuous girder bridge , the longest -linked (14 × 30m) , finite element model of structure together to consider the upper and lower parts of the plane , the internal force distribution on the real bridge and carrying The ability to the checking; The results show that the structural carrying capacity can not meet the regulatory requirements , the consolidated number of other reasons , resulting in structural transverse crack . ( 3 ) for disease bridge , 20m, 30m across the hollow board backplane large longitudinal cracks appear , the use of thin-walled structure theory for distortion analysis of thin-walled hollow board , combined with the finite element method calculation of the energy law and space thin-walled hollow under live load distortion stress of the plate , and the distortion of the existing hollow plate standard checking site load test , the theoretical analysis and experimental results prove that the distortion effects of the thin-walled structure is the main reason lead to hollow Banban bottom longitudinal cracks . (4) discussed the structure of hollow slab reinforcement program , and the eventual adoption of the method of implementation of the hollow plate structure reinforcement bonding steel plate in the bottom of the plate .
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