| In recent years with the rapid development of road and urban construction, curved girderbridges has become an important bridge type of modern traffic engineering due to its beautifullinear and harmony with the environment, the economy is good, the torsional stiffness of aseries of advantages. But most of the bridges built in the early varying degrees of damage,studies have shown that temperature loads can significantly affect the stress and deformationof concrete curved bridge, great importance to the impact of temperature load to the bridgehas been attached domestic and foreign. In this paper, the temperature effects of concretecurved box girder bridge have been discussed and analyzed systematically. The main researchcontents are as follows:1ã€It is studied the formation of the temperature load, classification and characteristics;and introduced three methods of analyzing temperature field of bridge structure, andcomparative analyzed of these three methods; at last focused on the calculation methods ofconcrete curved box girder bridge inside and outside restraint stress under the temperatureloads caused by solar radiation.2ã€Setting up a three-dimensional model of the continuous concrete curved box girderbridge, calculating the temperature effect, and compared with the straight bridge; choosing theold and new temperature gradient mode, and analyzing the stress and deformation of curvedbox girder bridge, at last Comparing the temperature effects of these two modes.3ã€Calculating and analyzing the curve continuous box girder bridges temperature effectdepending on the different bearing arrangement, and in accordance with the results of theanalysis to determine the a reasonable bearing arrangement.4ã€Thinking the characteristic of different geometric parameters and boundary conditions,it is analysed that temperature effect of concrete curved box girder bridge, and summed up thechanges in patterns and trends. Finally, got related conclusions and Put forward suggestions. |
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