Study Of High-volume Fly Ash Conventional Dam Concrete Adiabatic Temperature Rise Model And Temperature Simulation

Adiabatic temperature rise model of concrete is very important in simulated computation of temperature field of mass concrete.In this paper,a combination model from different kinds of function model of adiabatic temperature rise was proposed to fit the adiabatic temperature rise test data of high-volume fly ash conventional dam concrete(HVFACDC)to obtain the reasonable adiabatic temperature rise model.This adiabatic temperature rise model can be used for FEM simulation of temperature field of the dam whose material is HVFACDC.The 1.2m large cubic specimen of HVFACDC was tested to obtain the temperature history curve in the middle of the specimen.After 3D simulation calculation,the temperature history curve obtained by simulation calculation for the large specimen was compared with the abovementioned tested one.The two results coincided to a good degree which revealed that the obtained adiabatic temperature rise model of HVFACDC is applicable.Thus,temperature history curve of HVFACDC can be achieved.This model increases the precision of temperature field calculated by FEM simulation of dam.In addition,the temperature field of concrete of arch dam model simulation was made.The finite element model is established by Ansys software and it is posed to use the Fortran temperature control simulation to calculation the temperature field.Analyzed Dagangshan hyperbolic arch dam temperature field and of the construction period,and made a comprehensive study of its characteristics and development law;made achievement for engineering.Finally,the temperature history curves was determined after compared with the test data of dam concrete,which will provide the condition of temperature match.And it will provide temperature history curves for temperature-stress testing of basic concrete and HVFACDC that can serve the next study of cracking resistance performance at early age.