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| Dynamic Characteristics Analysis of the Variable Cross - section Continuous Box Girder Bridge with Corrugated Steel Webs |
| JI Wei1，DENG Lu2，LIU Shi - zhong1，LIN Peng - zhen1 |
| (1. Lanzhou Jiaotong University，Lanzhou，Gansu 730070，China; 2. Hunan University，Changsha，Hunan 410082， China) |
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Abstract Research purposes ： In order to study the dynamic characteristics of the PC box girder bridge with corrugated steel webs ( CSWs) with variable cross - section，the bridge model with the span (3+3) m used in the experiment testing is a one - to - ten scale model developed for the Juancheng Yellow^ River Bridge. The model test and ANSYS finite element simulation are used to study the dynamic characteristics of the PC continuous box girder bridge with CSWs with variable cross - section. Research conclusions ： The results show ： (1) The number of diaphragm has great influences on the torsional vibration frequencies of this type bridge， while has little influences on the vertical bending vibration frequencies. (2) The fundamental frequency formulas from the JTG D60 -2015 code for the continuous girder are used to calculate the PC box girder bridge with CSWs with variable cross - section. The measured values and FEA values have big differences with the JTG D60 -2015 code values，so vertical fundamental frequency formulas of the continuous girder in current code are not suitable for this kind of bridge. (3) Considering the shear deformation of the CSWs， the correction formulas are obtained for the PC box girder bridge with CSWs with variable cross - section. (4) The research conclusions can provide references for the analysis of dynamic characteristics of variable cross - section PC continuous box girder bridges with CSWs in highway bridge engineering.
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Received: 14 September 2015
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2016, Vol. 33 
