Research On Dynamic Risksharing Of Large Project Underipd Model

The study of risk sharing is one of the hot issues in the construction of current projects.China's infrastructure industry is booming,and the scale of the project gradually increases,the main structure and functions are becoming more and more complex,leading to the increasing risk of the project.In traditional project delivery mode,all the participants in their own interests as the main target,make it ignore the interests of the whole project,there are cooperation,lack of effective communication between the parties and the innovation capacity is low and a series of problems,so even further increase the risk of the project.In today's society,higher economic benefits,better use requirements,and more complex designs are a huge challenge to traditional project delivery models.Based on this,a new delivery mode,IPD(Integrated Project Delivery)model,has been developed and has been accepted and applied by the industry.With the IPD model put forward,various countries continue to study and explore,hoping to implement a wide range of applications.However,there is widespread lack of cooperation and trust among project participants,which hinders the realization of these goals,and ultimately leads to dissatisfaction between contractors and owners of the results of the project implementation.In this case if the risk can not be estimated or promises can not be honored,the IPD team will face the collapse of the situation,so that at present only a handful of IPD project can finish.The IPD model successfully in the China,needs to establish a set of reasonable,the parties involved are fair risk sharing scheme,to improve the efficiency of cooperation between the participating parties,the real implementation of IPD model can reduce the project cost,which is of practical significance.This paper describes the basic theory of risk sharing,the concept and mode of IPD,and its key features,successful technology platform,mainly from the analysis of the "risk sharing,benefit sharing" perspective,sharing model will lay the theoretical foundation for the construction of IPD risk model.At present,there are too few studies on the risk sharing of large-scale engineering projects under IPD model in the society,therefore,IPD model large-scale project by Delphy method,initially identified 34 risk indicators,the combination of rough set,remove some relatively unimportant and redundant indexes,the remaining 15 indicators of the relative importance of risk.Then,using the OWA operator to determine the weight method and the grey relational analysis method,the risk sharing model based on the grey relational grade analysis method is established.The risk is divided into individual risk and common risk.For individual risk,the risk of each participant should be determined according to the degree of Association;the stochastic cooperative game method is used to calculate the proportional value of the risk shared by the participants.Finally,with the Shanghai expo garden state grid enterprise library as an example,on the basis of the model system has carried on the corresponding to its risk sharing research,and verify the rationality and feasibility of the model,and to provide the related reference for later study.