Engineering, procurement, and construction (EPC) contracts are becoming the most common form of contracting in the hydropower trade for large-scale hydropower projects. Because of an increase in the complexity, variability, and uncertainty in hydropower engineering, project participants and stakeholders are increasingly cooperating in a collaboration network, which enables them to share risks, information, and resources as well as explore new experiences to jointly participate in the management of large-scale projects. Thus, this paper proposes a new methodology for the collaborative management of hydropower EPC (hydroEPC) projects using building information modeling (BIM) technology. In this paper, a work model of collaborative management using BIM technology for hydroEPC projects is introduced, and a BIM-based collaboration platform for the management of hydroEPC projects is developed using a three-tier architecture and web technologies, whose functions are implemented in five modules, including a model creation module, model management module, collaboration management module, workflow management module, and system administration module. The prototype system is applied in a selected case study of an ongoing project in southwest China to demonstrate the effectiveness of collaboration in a BIM environment. The results demonstrate that the prototype system can be used as a visual BIM-based collaborative management platform using BIM technology.

Structures made of Roller Compacted Concrete (RCC) may be subjected to dynamic loads during their service life. Understanding the dynamic material properties of RCC and the performance of RCC structures is essential for better analysis and design of RCC structures. As full-scale tests are often unaffordable, numerical simulation methods are continuously employed. However, in numerical simulations, determining a reasonable constitutive relationship for RCC materials is still limited due to the complexity of the composite and the special rolling and compacting construction technology. In this paper, the triaxial compressive test and split Hopkinson pressure bar (SHPB) experimental results for RCC are introduced as an experimental foundation. Parameter calibrations and modifications in terms of the strength yield surface, the strain rate effect and the failure criterion for the RCC materials are presented. Numerical verification is illustrated for simulating the SHPB experiment and predicting the dynamic compressive characteristics of RCC specimens with a modified HJC model. The results reveal that the simulation results for the modified model have better agreement with the test data than those with the model before modification and have better simulation results. Sensitivity studies of the key parameters on the yield surface of the modified HJC model are conducted to improve the simulation effect for numerically predicting the performance of RCC structures exposed to explosive and impact loads.