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| Study on Nonlinear Stability of Continuous Rigid Frame Bridge with Single Thin-wall Rectangular Hollow Piers |
| ZHANG Yun-bo1 LIU Da-peng2 |
| 1 .Shijiazhuang Teidao University，Shijiazhuang，Hebei 050043，China; 2. Hebei Yuanzhou Engineering Consulting Co. Ltd,Shijiazhuang，Hebei 050035，China |
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Abstract Research purposes:With the rapid development of transportation in our country，a large number of long- span continuous rigid frame bridges with high piers are constructed. Because of high piers and large span，the nonlinear stability problem in the type of bridge construction process is very prominent. This thesis relies on a typical continuous rigid frame bridge with single thin-wall rectangular hollow piers-Wangjiaba Bridge construction monitoring project， studies the single nonlinear stability of the continuous rigid frame bridge with single thin-wall rectangular hollow piers， analyzes the stability eigenvalue of the bridge under each construction stage and nonlinear limit load value.
Research conclusions:(1)Load of eigenvalue buckling analysis is obtained for upper limit of bridge structure stable limit load.(2)Considering the geometric nonlinearity,material nonlinearity and the initial defects nonlinear stability analysis of the influence of the factors such as load，more in line with the actual situation.(3)The highest pier maximum cantilever construction condition is the most adverse conditions of the high pier construction.(4)The paper can provide the reference for construction monitoring，design and theoretical research of long-span continuous rigid frame bridge with high piers.
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Received: 03 July 2013
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2014, Vol. 31 
