施工期不同加载过程对拱坝应力场影响研究

Research on the Influence of Different Loading Process to Arch Dam's Stress Field in Construction Period

拱坝整体结构随大坝浇筑、封拱不断推进而逐渐形成,坝体结构形式在施工过程中是变化的,因此,在浇筑、封拱过程中坝体承受的荷载形成的力学效应也是不断变化的。研究了不同封拱过程和不同蓄水过程以及施工期温度荷载对拱坝坝体应力场的影响,导出了不同加载过程条件下坝体应力的表达式。

Arch dam＇s whole structure formed gradually through pouring and arch sealing, dam structure was changing in constructing process, and the mechanical effect formed in pouring and arch sealing was also changing. This paper researched the effect of different arch sealing process and pouring process and temperature loading to arch stress field, deduced the arch stress expression under different loading process condition.