Study On Optimation And Coordination Of Prefabricated Building PC Supply Chain Planning With Resilience

The prefabricated construction brings forward higher requirements of the supply chain management of the prefabricated components(PC).However,the existing studies on the PC supply chain management are not deep enough,especially ignorance of the researches on optimization of the PC supply chain planning regarding coordination among multiple stages,uncertain disruption response,and coordination between staking and installation under dynamic and interactive environment,which has hindered from achieving the advantages of the prefabricated construction and correspondingly has restricted the development of construction industrialization and informatization in China.In view of the significance of the PC supply chain planning as well as coordination requirement among multiple stages in the supply chain,uncertain disruption response,and coordination impact between staking and installation under dynamic and interactive environment,this study proposes an optimization methodology for the PC supply chain planning with regards to coordination planning among multiple stages in the supply chain,supply chain resilience planning,and coordination planning for staking and installation.The supply chain management theory,synergetic theory,resilience theory,supply chain Just-In-Time(JIT)strategy,and the Particle Swarm Optimization(PSO)algorithm are integratedly utilized.Based on the analyses on development background of construction industrialization and the necessity of collaborative and resilient planning of the PC supply chain,the scientific problems resolved for studying the PC supply chain planning are put forward and refined.Then,literature review around the relevant studies is carried out,and related theoretical bases are presented and summarized.This study is carried out directed against the following aspects:(1)Study on optimization of multiple-stage collaborative plan for the PC supply chain:Regarding the interdependency and coordination requirement among multiple stages including production-supply,transportation,stacking-installation of the PC supply chain as well as the different interest goals of the participants including supplier,carrier and contractor,study the collaborative optimization model and the solving method with respect to order planning,transportation planning and stacking-installation planning for the PC supply chain based on the construction schedule plan and by applying the supply chain synergetic theory,just-in-time(JIT)strategy,lead-time buffering strategy,and the particle swarm optimization(PSO)algorithm.(2)Study on resilience-cost tradeoff optimization for the PC supply chain plan:Regarding that the prefabricated building component supply chain under uncertain disruptions may result in unpunctual supply and late delivery of the prefabricated components to the construction site and finally prolong the project duration,study the resilience-cost tradeoff optimization model and the solving method for the prefabricated building component supply chain plan with the resilient capability to deal with the uncertain disruptions through alternative supply sites and adjustable transportation schemes based on the construction scheduling plan,the coordination requirement and JIT strategy among the production-supply stage,transportation stage and installation stage as well as by applying the resilience theory,and the multiple-objective particle swarm optimization(MOPSO)algorithm.(3)Study on multi-phase dynamic optimization for stacking-installation collaborative plan of the PC under single-crane operation: Regarding the interactive and dynamic constraints that affect the coordination between stacking and installation,such as components’ arrival times,characteristics and installation locations,construction schedule,yard conditions and tower crane position,based on the installation construction schedule-based multiple-phase division and stacking-yard dynamic allocation strategy,study the multi-phase dynamic optimization model and the solving method for the stacking-installation collaborative plan of the PC under single tower crane operation by combining the JIT strategy,the lead-time buffering strategy and the PSO algorithm.(4)Study on dynamic optimization for stacking-installation collaborative plan of the PC under multiple-crane operation: In consideration of avoiding the collisions under multiplecrane operation as well as other dynamic and interactive constraints,based on the installation construction schedule-based multiple-phase division and stacking-yard dynamic allocation strategy,and the collision avoidance strategy for multiple-crane operation,study the multi-phase dynamic optimization model and the solving method for the stacking-installation collaborative plan concerning tower crane allocation for the PC under multiple-tower crane operation by combining the JIT strategy,the lead-time buffering strategy and the PSO algorithm.Finally,some cases of the prefabricated building projects are based to apply and analyze the above research results,thus justifying the rationality and validity of the proposed optimization method for the collaborative and resilient plan of the PC supply chain.The research results will improve the decision-making level,provide guides to action for achieving multiple-stage coordination of the PC supply chain,responding to uncertain disruption during the supplytransportation process as well as stacking-installation coordination under the dynamic and interact construction environment,so as to promote the schedule management and safety production efficiency for the prefabricated construction process,advance implementation of the prefabricated construction method’s advantages as well as promotion and development of the prefabricated building.This study will not only contribute to theoretical bases and technical supports for optimal decisions of the PC supply chain plan concerning multiple-stage coordination,responding to uncertain disruption and stacking-installation coordination,but also provide basic works for achieving intelligent monitoring and controlling on the prefabricated component supply chain by combining modern information and communication technologies,assisting in facilitating new building industrialization and realizing transformation and upgrading of the construction industry of China.