Refined Calculation and Demonstration for Sunshine Temperature Difference Effect of Long Span Continuous Beam

The continuous rigid frame bridge of Jiagai River Bridge is (100 + 192 100) m, with a main span 192m, which will break the historical record 176m Chaoyang Jialing and become largest single track railway in China. has characteristics large load, poor stability high prestress requirements. temperature difference sunlight produce deformation emperature stress concrete box girder bridge, affect linear monitoring measurement results. In particular, sunshine nonlinear gradient vertical transverse direction cross section statically indeterminate resulting generation self secondary stress. This kind often large, leads to cracking even endangers normal operation future. paper studies calculation field, caused by solar radiation, compiles program realize visual effect.