Analysis of Deflection Problems of Large-span Continuous Rigid Frame Bridge and Prevention Measures
Highway College, Chang’an University, Xi’an, Shaanxi, China
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The large-span continuous rigid frame bridge is a kind of common structural form in long-span bridges of our country, but one of the main diseases of these bridges is the excessive deflection in the mid-span, which seriously affects the safety of the structure. This paper makes a comprehensive analysis for the causes of the excessive deflection, and lists the commonly-used control measures in engineering. Simultaneously, new improvement measures and the comparative analysis of before-and-after improvements are put forward on this basis. However, these measures can be used to inhibit deflection in a certain extent, but cannot avoid the occurrence of deflection completely.
Key words: continuous rigid frame bridge / excessive deflection in the mid-span / cause / prevention measures
© Owned by the authors, published by EDP Sciences, 2015
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