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木浪河拱坝加高工程为拱坝加高培厚成折线型重力坝,坝体加高幅度大、结构受力复杂.采用有限元分析软件ADINA的非线性接触功能模拟新老坝体的接触关系,对新老坝体结构在各种工况下的应力变形状况进行仿真分析,计算结果表明:在正常蓄水位工况下,加高培厚后的坝体能够较好地整体工作,新老坝体接触面没有脱开,但有较大范围的粘结滑移;新老坝体位移等值线分布存在明显差异,在新坝体与老坝体坝顶附近接触的部位由于新坝体的向下滑移受到约束而产生竖直向拉应力.在正常蓄水位回降至死水位工况,原拱坝下游面与新坝体上游接触面存在大面积的脱开区,但脱开度基本在4mm以内,可通过加密锚筋减小脱开区;在该工况下,原拱坝坝顶上部的新坝体则因结合面的错动而出现顺河向的水平拉应力.
Mu Langhe arch dam heightening project for the arch dam heightening thickened into a line of gravity dam, the dam height increase, the structure of the force complex.Using the finite element analysis software ADINA nonlinear contact function to simulate the contact relationship between new and old dams , The stress and deformation of old and new dam structures under various working conditions are simulated and analyzed. The calculation results show that under the normal water level conditions, the dam body after the height and thickness training can work well as a whole, The body contact surface is not disengaged, but there is a large range of bond slip; there is a significant difference in the displacement contour distribution between the old and the new dam body. Because of the new dam body contact with the dam near the dam, Downward slip is constrained to produce vertical tensile stress in the normal water level back to the dead water conditions, the downstream surface of the original arch dam and the new contact surface of the dam there is a large area of the area, but disconnected The basic degree is less than 4mm, and the detachment area can be reduced by the reinforcement of anchor bars. Under this condition, the new dam body at the top of the original arch dam appears the horizontal tensile stress along the river due to the wrong movement of the joint surface.