Analysis And Research On The Forces Of The Prefabricated Concrete Components In The Whole Process Under Different Transportation Conditions

In recent years,with the continuous development of industrial buildings in China,in the construction of new buildings and the reconstruction of old residential areas,prefabricated buildings are favored by constructors for their rapid processing and production capacity.The complete system of assembled buildings at this stage is mainly divided into design stage,production stage,transportation stage and hoisting of construction site stage.With the rapid development of prefabricated buildings,problems such as overall management and finished product control arise,which ensure the factory quality in the prefabricated factories,as well as problems that may arise in the transportation process.In this article,according to problems that the complexity of the transportation road,the degree of turbulence in the transportation process,and the collision with the steel frame during hoisting,will damage the prefabricated concrete components,this damage will affect the accuracy of the installation.Regarding to the existing transportation methods,the prefabricated components used in the construction of the Honglianyuan residence community,such as prefabricated wall panels,prefabricated balconies,prefabricated stairs,prefabricated wall panels,etc.,have been systematically experimented during the transportation process.And compared the finite element results with the test results to verify the accuracy of the model,and propose follow-up improvements.The main research contents are as follows:(1)Analysis the background and trend of current building industrialization,and points out that the protection of finished products of prefabricated components is also an important part.The protection of finished products can greatly reduce unnecessary losses,and summarizes the research status at domestic and abroad.Explain the overall idea and framework of the article.(2)To sort out the prefabricated concrete components and explain the reasons for the selection.(3)Go to the prefabricated factory for component selection and experiment,and draw conclusions through the experiment,summarize where the prefabricated components are subjected to greater stress,and what conditions will be subjected to greater stress during transportation,which will affect the components.(4)Use ABAQUS to carry out numerical simulation analysis and compare with experiment to verify its accuracy.And propose improvement plans and corresponding protection measures.Through experiment and finite element comparison,it is found that the main stress point of the side-leaning type prefabricated concrete components is the contact part with the steel frame during transportation.The stress at the opening of the wall panel with doors and windows is also greater than the general part.The vulnerable scope is mainly the corners where the bottom contacts the steel frame and the openings.For stacked prefabricated components such as prefabricated stairs and prefabricated balconies,the stress of the lower layer is greater than the stress of the upper layer,and the vulnerable range is mainly in the contact part of the stair step and the cushion block and the contact part of the balcony and the cushion block.It is necessary to paste soft materials on the steel frame and cushion blocks at the vulnerable parts,pre-protection during hoisting and loading,and buffering during transportation to protect the finished components.Figure [86] table [11] reference [60]...