Abstract:LTG Bridge is a long-span V-shaped pier rigid-frame and arch combined bridge, and its span composition is (2×30+80+2×30) m.The bridge has four steel-concrete composite segments, which are symmetrical.The structure and force situation of steel-concrete composite segments are complex, in the analysis of the whole bridge,it is difficult to take structure details into consideration. Based on global finite element analysis of this bridge, the paper researched the mechanical behaviors and improvement mea...