The 5th International Conference on Civil Engineering and Urban Planning (CEUP 2016)
August 23-26,2016, Xi'an, China
Prof. Kouros Mohammadian

Department of Civil and Materials Engineering
University of Illinois at Chicago, USA
Speech Title: Integrated Urban Systems: Transportation, Land-Use, Energy, and Environment
Abstract: Transportation system is multifaceted and influenced by various other urban systems. Undeniably, transportation system, built-environment, urban logistics, public health, environment, and energy resources are fundamentally linked. Therefore, they must be explicitly captured if the full impacts of urban policies are to be assessed. In this lecture, we will review a comprehensive urban system framework that allows exploring the interactions and interrelationships between connected urban systems. At the core of the integrated urban framework, are two large-scale microsimulation models of ADAPTS and FAME. The ADAPTS model presents the next generation activity-based travel demand modeling paradigm that is developed specifically to address many limitations of practical activity-based models by retaining the link at the individual level between activities and travel. It models the processes by which activity-travel patterns are developed. In that sense, ADAPTS takes the activity-based paradigm one step further by explicitly and dynamically representing the process of activity planning rather than relying on a sequential series of models. This allows the direct impacts of policies in the decisions made during activity planning. The FAME model represents a pioneering effort in freight demand modeling that has a separate component for supply chain configuration and has a wide geographical and industrial coverage. The model incorporates firms’ essential characteristics in replicating shipping behaviors, and aims at paving the way for more advanced behavioral freight microsimulation models. The models are currently further extended to include emission and dispersion models, as well as a public health impact model. In addition, the ADAPTS model is being expanded to include in-home activities that can help developing policy-sensitive and individual-level energy consumption and conservation models.

Ahmed MEBARKI

Professor Ahmed Mebarki at University Paris-Est, Lab. Modélisationet Simulation Multi Echelle(MSME / UMR 8208 CNRS), 5 Bd Descartes, 77454, Marne-La-Vallée, France
Speech Title: Risks and resilience: metrics, basins, attractors and sensitivity analysis for structures
Abstract: Under given conditions, a system may be damaged by occurrence of natural, technological or industrial hazards.For instance, in civil and urban engineering, structures and lifelines as well as human or economic societies may suffer from many kinds of hazards. In the case of physical systems such as structures, the bearing capacity or utility functions can suffer losses due to hazards damaging effects: case of earthquakes, tsunamis, floods, fires and explosions, and cascading effects.The author presents theoretical developments of the resilience which defines the capacity for recovery after prior drop of the utility functions or bearing capacities. A structure is considered for illustrative purposes: a metal beam under transversal loading (case of floods for instance). Its bearing capacity, damage and loss of capacity, plastic adaptation and recovery functions are developed by considering the material behavior. The sensitivity analysis carried out on a metal beam, as a physical demonstrator, shows that:
- the system is resilient as long as the damage does not affect more than 18.4% of the resisting area, in the case of a beam with one full support;- the system is more resilient in the case of two full supports;
- the recovery functions and the bearing capacity can be theoretically identified in ideal cases such as metal structures with one or two full supports;
- the operating space [Hazard, Fragility, Resilience] can be divided into easy-to-identify sub-domains for resiliency or non-resiliency. Potential functions for resilience and recovery can also be defined objectively so that basins and attractors can identify the cases of resiliency from those of impossible recovery. The final state (resilient or not) will depend on initial drop of capacity due to the damaging hazard, the material and sub-systems (components) interaction, the available resources and the capacityof adequate management. The adaptation to the case of human, social or socio-economic sciences can be easily done as long as the utility and recovery functions (as well as the identification of the interactions between its components and at its frontiers) can be objectively defined and assessed for the system under study.

Key words: Resilience, Hazard, Damages, Risk, Reliability, Fragility, Plasticity, Recovery, Structures

Professor Wenzhe Tang

Professor and Director Institute of Project Management and Construction Technology Dept. of Hydraulic Engineering Tsinghua University New Hydraulic Building
Speech Title: Sustainable Hydropower Development for China

Abstract: Sustainable hydropower development plays a critical role to reduce the environmental impacts arising from using fossil fuel. We presented solutions to sustainable hydropower development for China on three governance levels. At international level, China should establish partnering relationships with the neighboring countries to cooperatively manage the transboundary rivers associated with hydropower production, water sharing, environmental sustainability and climate change. China has a wealth of experience and technologies to contribute from its many previous hydropower projects. At the national level, there is a need to measure and understand the cascade effects of dams at river basin scale for optimizing the reservoir operation and environmental protection. Laws and regulations on hydroelectricity pricing and migrants’ compensation standards should be reformed and updated. Inter-regional transfer payments to the local authorities for balancing social and environmental losses of affected areas need to be developed for equitably allocating benefits/rewards among stakeholders. At the project level, more attention should be paid to migrant resettlement, land planning, natural resource preservation, and enhancing input in infrastructure development. Government should help migrants with education, employment, and forming new social networks, without devaluing their livelihoods and social capital. The scheme has both research and policy implications. The approaches can not only help to choose appropriate low-carbon development strategies for China, but also be applicable to global river basin management and hydropower developments, especially in developing countries.

Key words: Hydropower, Environmental sustainability, Migrant resettlement, Land planning, Social capital, Governance

Associate Professor Hua Jiang

Associate Professor Hua Jiang in Bridge Engineering at Chang’an University, China
Speech Title: Failure mechanism of a progressive collapse of multi-span continuous bridges caused by barge collision

Abstract: Multi-span continuous bridges are widely used for navigable waterways, but are susceptible of collapse when subjected to accidental vessel collision. This paper presents a numerical study on the progressive collapse of a multi-span continuous bridge caused by barge collision using an explicit finite element program LS-DYNA. A collapsed bridge occurred in China due to barge collision is taken as a case study in the investigation. The numerical simulation reproduces the real collapse process of the bridge reasonably well, and offers insightful failure mechanisms of the bridges.

Key words: Vessel-bridge collision; progressive collapse; continuous bridges; numerical simulation
The 5th International Conference on Civil Engineering and Urban Planning (CEUP 2016)
Contact Person: Dang Chunlei
Email: ceup@ceupconf.org   Tel: +86-15827144528