Exploring The Renewal Stategies Of Urban Residential Building Stock In The Perspective Of Building Lifespan And FAR

In the process of rapid expansion and renewal of China’s cities,a large number of buildings that have not reached the designed service life have been dismantled because of various reasons.At the same time,real estate development often overlooks the overall social and environmental quality of the city,and carries out high intensity development to bring about a new environmental deterioration.The demolition and construction of building stock should not be cut apart.The main targets of this study are: to study and analyze the prediction method of the lifespan of building structure and the floor area ratio of new residential buildings in one area,in order to provide a scientific prediction model for the demolition and construction of the residential buildings stock,and to optimize the renewal simulation tool of the urban building stock,FRAGSIM,developed by the project team.The method and tool can support the decision making of the renewal strategies of the residential building stock.The study took Tianjin Hongshunli area as an urban fragment for case study.First,the basic information and history of the fragment are obtained the through literature study and field investigation,and the typical buildings are classified and selected.Then the prediction methods of architectural structural life are summarized and applied to predicted the remaining life of the typical buildings on the case study urban fragment.Moreover,the prediction method of the floor area ratio is defined by studying the factors affecting the floor area ratios,and the possible future floor area ratios of the fragment is predicted.Based on the research findings,the original simulation tool FRAGSIM is further developed and implemented on the case study fragment.This paper summarized the prediction methods of building structure life.The residual life prediction of concrete structures is calculated based on the stage model of concrete life,while the life of the brick concrete structure is greatly influenced by the environment,which is calculated by the coefficient method.The prediction of volume ratio of new residential buildings is based on experience deduction,population capacity and economic benefits of developers.On this basis,this paper will consider the life and volume ratio of architectural structure as a whole,optimize the FRAGSIM,and combine the typical buildings with the practice.Through the related simulation,it confirms the adverse effects of short life and overexploitation of the building on the resources and environment,and the optimal renewal strategy is drawn up through simulation for the study of the stock of different residential buildings.