Finite Element Method Analyses Big Volume Concrete Structure Temperature Strain

With the fact that promptness that the basis builds develops, concrete structure application has been more and more many, the concrete has already occupied very important position in modern engineering construction, disregarding what project, is to adopt reinforced concrete structure mostly, because of this building material comparing with in the past what be used brick stone wooden structure is good and cheap, the force being under construction going to the lavatory, bearing the weight of is big, may decorate the strong characteristic, welcoming accepting people gradually. Be still civil architecture in our country disregarding being an industrial architecture, the armoured concrete application so to speak is nowhere absent face to face.At present, the concrete temperature rift is in progress to big volume the tensile property being that this thinks during the past one o'clock, but cutting down cement dosages also will be uses a concrete from trying one's best to cut down cement dosages mainly reduces under the control of. That the temperature to the concrete breaks with slot therefore saying this method is not very good under the control of. And then we change a angle, can add some fine coal ash among them, such returns back to the dosages being able to stick to middle cement of concrete, be adding the temperature rift problem that some change nature material makes stir and mix the good concrete having certain tenacity, concrete, this way forming high-performance with regard to being able to resolve big volume concretes.The main body of a book take experiment as basis, face to face adulterate add fine coal ash, pulpex P and emulsification pitch etc. change nature material the concrete Mechanics function has carried out analysis studying, has built big volume concrete slabs finite element method analysis model, has carried out comparison, verification on test result and the theoretical analysis result adulterate add change nature material concrete oneself fights against temperature strain ability. Have carried out the following job mainly:â‘ On already some research results basis, according to conduction of heat basal principle and finite element method method, the mechanism having introduced rift cause of formation and dehiscence, has thought that Xu a series of factor such as changing, airing shrinkage causes effects on big volume concrete rifts hereof at the same time.â‘¡Change nature material by adulterating add a block of wood and constitutive sum quantity's within the concrete, the Mechanics function stirring and mixing the good concrete of small side door to such has carried out an experiment, has reached the main law:Fever of adulterating the fine coal ash and ganister sand adding appropriate amount, being able to reduce aquation, improves the intensity and density; Function adding pulpex P, being able to be an effective to improve concrete material limit stretcher strain and to resist to crack; Add the appropriate amount emulsification pitch, can improve peaceability, can play arrive at subtraction water role.â‘¢Have applied finite element method to analyse software MIDAS/gen, have built some project example temperature strain models, have studied big volume concrete temperature and temperature strain distribution law, and and adulterate have added the concrete changing nature material have carried out contrast, have verified new model feasibility in adulterating the high-performance concrete much applying to actual project.