Research Of Thermal Stress Fields On Massive Anchorages With BIM Technology

Nowadays,with the level of science constantly improved,IT,a new technology in 21 century,has brought revolutionary changes to construction industry,machinery industry,manufacturing industry and so on.However,applying BIM to the bridge is still in a relatively low-level stage.Since the 12 th Five-year plan,the bridge industry have been needed to develop technology towards a direction of low energy consumption and high efficiency.With increasingly intense competition in the domestic and international bridge industry,BIM must be strongly promoted,developed and did researches as a product in new times.Based on the core concrete construction process of Yangsigang Yangtze River bridge anchor-mounds which is located in Hanyang as an engineering background and regarded temperature cracks which is caused by hydration of cement within concrete as subjects in the study,this paper utilize Midas FEA which is a large-scale finite element analysis software.And the module of the analysis of hydrated heat is used to study the analysis of thermal stress field of hydrated heat.In this thesis,the layout of cooling water pipe of massive-cored concrete is mainly optimized by BIM technology.In order to reduce the adverse effect of hydrated heat on the structure,the main research is as follows:Firstly,Combined with the BIM model,it introduced that BIM technology is applied to anchorage engineering.during the construction procedure of the anchorage,the application of BIM about the establishment of model and database,the control of the costing of construction process makes a foreshadowing for the following analysis of thermal stress fields.Secondly,through parameterized plug-in of Grasshopper which belongs to the Rhino,one of BIM software to adjust the diameter,the length,the distance and flow of the cooling water pipe in order to determine optimal layout of cooling water pipes,reducing the impact of hydrated heat on the concrete.Thirdly,based on the heat conduction theory of concrete,the finite element model of Midas FEA is established to analyze thermal stress field of massive concrete.Fourthly,introduced finite element model analysis about the comparison of not adding cooling pipe and adding cooling pipe.At the same time,though the comparison of measured data and simulation data,it is verified the feasibility of BIM for finite element analysis.Finally,through the analysis of thermal stress field,it is proved the worst location of thermal stress field about massive concrete.Before the start of the project,the project department can get feedback about the situation in order to control the generation of temperature cracks about massive concrete to the maximum extent.