Study On The Mechanism Of Static Ice Load On Hydraulic Structures In Alpine Region

Alpine areas of unique mountain melting water resources,making the construction of hydraulic structures is essential,because the climate is relatively cold,will cause the region of the river canal,the reservoir icing,the formation of ice load.When the ambient temperature rises,the ice sheet will naturally swell and produce the temperature of the ice.When the water level below the ice show the situation,the building will be the role of anti-freezing effect of ice,this force is called pull force.In order to improve the safety and stability of hydraulic structures in alpine areas,the effect of static ice load must be taken into account.In this paper,the mechanical properties of freshwater ice materials are understood by searching the relevant ice mechanics literature at home and abroad.The extended finite element method in thermodynamics and fracture mechanics is studied,and the finite element model and finite element method of ice sheet are established by using ABAQUS large general finite element software.The finite element simulation is used to calculate the temperature expansion Pull force distribution law was studied.The results show that the temperature expansion of ice in the alpine region is mainly distributed in the range of 2/3 of the upper surface of the ice sheet,and the maximum thermal stress is on the upper surface of the ice sheet.The pull force generated by the ice sheet on the building has a significant relationship with the height of the water level,which is the form of the action of the shear and the moment.By comparing the conventional finite element method and the extended finite element method,the tensile force effect shows that the fracture mechanics is more advantageous and more practical in solving the limit stress problem.