Discussion Of Relationship Between Space Length And Closing Time Of The Post Poured Belt Of Frame Structure

In order to meet the functional requirements in recent years, reinforced concrete frame Structure requires no or fewer expansion joints ,which results an increasing number of cracks in reinforced concrete structures . If we do not handle proerly in the structural design, reinforced concrete frame structure will product cracks in temperature deformation, contraction deformation of concrete materials and its effect. In severe cases, the structure will affect the normal use. buildings have complex form and calculation of thermal stress on the existence of great difficulties, which leads researchers and designers to some rough conclusions by simplify the calculation. Super long architectural design without considering the temperature effect in the majority, only structure treatment. Thus we should deal with temperature problem in structure design. Currently, the post poured belt is a construction method to prevent temperature cracks in engineering, but this method have also some problems in it. Such as: space length and closing time of the post poured belt is not clear,which will directly affect the method used in the actual project.The main work are the following areas:First, the beginning of the article describes the background of this research and introduces the stress analysis of concrete structures at home and abroad, thermal stress analysis method of structure and a review on post poured belt. Thesis expoundes temperature stress and shrinkage stress of the current structure and space length of the post poured belt, as well as some problems were analyzed and summarized to determine the content of this study and specific goals.Secondly, thesis introduces the concrete board of the main stress factors, and each of these factors will be analyzed. Through the study of the analysis of internal forces of steel bat and the establishment of model,we simplified calculation of the internal forces generated by temperature and Shrinkage contraction and get temperature and shrinkage stress value of Structure.And then we reduce or control temperature and shrinkage stress and deformation from views of the design, construction, materials.Then, the paper illustrates the design and construction with the post poured belt. The form, width, position of the post poured belt are analyzed, but the pape have a an detailed analysis to space length and closing time of the post poured belt. Through analysis of the relationship between space length and closing time of the post poured belt, I deduce how to derive closing time with how to derive closed after pouring time with poured with the spacing space length determined,which brings a theoretical basis for the construction.Finally, The conclusion summarizes the whole thesis , and the questiones which need to be researched for further are pointed out.