Temperature Monitoring And Numerical Simulation For Mass Concrete Equipments Foundation

With the rapid development of infrastructure construction, equipment foundation ofmassive concrete structures is increasingly being used in industrial buildings. As the ownconditions of concrete material and the complex and changeable construction of concretematerials, they lead to temperature changes and produce great stress of heavy equipmentfoundation in the process of pouring, resulting in different degrees and forms of cracks instructure, which can create seriously affects on safety and durability of the structure,therefore, researching the temperature field and thermal stress of massive concretefoundation of heavy equipment is particularly important during construction.In this paper, based on the summary of mass concrete at home and abroad on the basisof the causes of temperatures cracks that combining with the actual projects of equipmentfoundation of massive concrete structures, from theoretical study, field monitoring andnumerical simulation, these three parts to have deeply research on the internal temperaturefield and temperature stress of concrete. This article main research objectives as follows:(1)To combine with the actual projects, and through early on the big volume concretefoundation temperature monitoring, to achieve the internal temperature developmentregulars of concrete, and some suggestions for the controlling and anti-cracking measuresof mass concrete.(2)According to the pouring sequence of actual construction, to establish thecorresponding three-dimensional solid finite element model in the finite element softwareABAQUS, and according to the secondary development of ABAQUS interface, usingFORTRAN language compiler FOR the format of user subroutine, analyzing itstemperature field simulation, will get the temperature field calculation results, and toanalyse and compare them with the actual monitoring data. The results show that,temperature field numerical simulation can provide a similar performance with thereal-time measure, the maximum error rate is5.85%. It shows that the use of ABAQUS formeasuring the temperature field of mass concrete is entirely feasible to predict.(3)Taking analysis method of sequentially coupled thermal stress, the calculationresults of temperature field as a predefined field imposed on the model, to get thedevelopment regularity of heavy equipment foundation temperature stress. The resultsshow that: on the concrete surface vertical corner protruding parts and near the edge of the area that tensile stress value is bigger.