Finite Element Analysis Of The Temperature Response Of Masonry Structure

With the advantage of economical investment,convenient construction and using local materials,Masonry structure has already extensively been applied in a lot of fields such as residences,schools,hospitals etc,and it is regarded as a structure pattern which has broad using prospect.However,there are a lot of shortcomings such as low tensile and shear strength in this structure,so there have lots of different forms of cracks in the course of the construction and using of buildings.It is a very common problem and has become a problem of puzzling us in long time,especially in residential commercialization.Firstly,in this paper,the cracks of buildings are classified in detail.On this basis, the principals of temperature crack controlling of the masonry buildings are analyzed,and a wide variety of methods used for computing the thermal stress are summed up.Adopting the nonlinear finite element method,the following conclusions can be made:with the increase of height deformation has become biger and biger,thermal deformation becomes bigger,appears at building bottom,and the biggest thermal top.Thermal stress is big in the end and small in the middle.Secondly,based on two conditions of normal working environment and abnormal working environment,thermal deformation of model are analyzed in four woking conditions.Thirdly,thermal stress in masonry structure is influenced by many factors,such as temperature,restriction degree of the structure,structural patterns and dimension,etc.In this paper,it is analyzed through different influencing parameters.Associating the principle of prestressed masonry some structural columns are applied with prestress on the top of masonry structure.and draw a conclusion that prestressing is an effective measure.Finally,some common temperature cracks of masonry buildings and differences of foreign and Chinese code are summed,and integrated measures are put forward to prevent the temperature cracks on the basis of the conclusion of FEA,which provides a good basis for the further research of structure behavior with the thermal action.