钢管混凝土拱桥主拱混凝土浇灌的纵向优化分段

Longitudinal Optimal Segments to Cast Concrete into Bearing Steel Tubular Arch of Concrete-filled Steel Tubular Arch Bridges

根据钢管混凝土拱桥施工过程体系转换的特点 ,通过成拱状态弯曲应变余能逼近其合理状态应变余能 ,使成桥运营状态主拱拱轴逼近其恒载压力线 ,改善钢管混凝土拱桥运营状态的力学性能 。

This paper proposes a practical inverse analysis method of deciding optimal number of longitudinal concrete casting divisions of bearing arch of concrete filled steel tubular arch bridges,which are available for further development of this kind of bridge.Puts forward a quick approximate re analysis technique during the optimization,by letting bent strain superfluous energy of the bearing arch approach that of its corresponding rational state along with the axial line of the composite bearing arch approaching its pressure line of dead loads, so as to improve mechanics performances of the bridge after completion based on characteristics of structural system transformation in process of construction.