Abstract: In order to study the coordination and optimization of project duration in the two-level construction supply chain,which is constituted by the owner and the contractor,the op ti mizatio n mo del of traditional time-cost trade-off is built based on Activity-on-Arc network firstly.Aiming to the defects of traditional project duration optimization model,the dynamic project duration optimization model with fixed-resource-constrained is formed by considering the time value of capital.The mathematic model of project duration coordination and optimization in construction supply chain,is further proposed by considering the decision interaction between the owner and the contractor in the viewpoint of the whole supply chain,which is based on flexible-resource-constrained and bonus-penalty mechanism,considering the time value of capital.In addition,the solution algorithm of each model is given.Finally,the models are illustrated by an example.The results show that the outcomes of the traditional project duration optimization model are hard to be achieved in dynamic project duration optimization model,while it can be improved in the proposed model with bonus-penalty incentive.The proposed model can actualize the optimization of project duration coordination and Pareto improvement of construction supply chain as well.

Key words: construction supply chain, time-cost trade-off, time value of capital, project duration coordination, bonus-penalty incentive