Interdisciplinary Seminar Series
>>Integrating Physical Chemical and Biological Technologies for Controlling Emissions From Combustion Sources
By Dr Alvaro Martinez
Integrating physical chemical and biological technologies for controlling emissions from combustion sources has the promise of reducing costs and providing a multi pollutant sustainable approach to air pollution control. Mercury and nitrogen oxides are emitted from coal power plants and from fossil fuel combustion in industrial operations. Existing air pollution control relies on either water absorption or particulate filters, and a technology that make those systems effective for mercury and nitrogen oxides is presented here. Enhanced oxidation using hydrogen peroxide converts those pollutants into soluble species which can be removed by absorption, and in the case of NOx, potentially treated by biofiltration. Furthermore promoting the formation of particulate mercury makes it suitable to be removed in the filters. Sustainability and optimization of the technology can be assessed by Life Cycle Assessment and Six-Sigma to benchmark this approach against other existing technologies
>>Elastic Buckling Capacities of Piles Subject to Partial Section Loss
By Dr Breanna Bailey
This presentation summarizes preliminary results from on-going research about the effects of corrosion on structural steel members placed in marine environments.
Finite element analyses were conducted to determine critical buckling loads for rectangular, hollow pipe, and I-shaped piles subject to corrosion losses in the splash zone. Elastic buckling analyses generated Euler buckling loads for models with partial section loss in the splash zone as well as section loss across the entire pile length. Cross-sections were subjected to 25%, 50%, and 75% material loss. Rectangular and hollow pipe piles retained more than 70% of their capacity even when 75% of the material was lost in the splash zone. The I-shaped pile, however, became unstable for material loss exceeding 25% because lost flange material significantly reduced the moment of inertia. Results for hollow pipe piles indicate that they are likely to experience inelastic yield prior to buckling. For all three cross-sections, critical buckling loads were higher when loss was limited to the splash zone versus the full pile length.
>>Transportation Engineering in China
By Hongchao Zhang
After 20 years breakneck construction, a comprehensive rapid transportation system also the world biggest was developed in China. It consisted of express railways travelling in 300~400 km/h, freeway networks, airports and harbours. Tibet, one of most inaccessible region in the world even can be reached by train since the operation of the Qinghai-Tibet Railway.
The milestone 80,000km has already stood by the roadside of the Chinese freeway. A new program of another 50,000 km freeway, 40,000 km express railway and 600 airports is undergoing. Where comes the investment? How to make the transportation plan? What techniques are badly needed? And what experience can be learnt?
In this presentation, Dr. Zhang will first introduce the background of the National Strategic Transportation Program. He will then discuss the questions above and the difference between US and China. In the end, he will introduce the research works made by Tongji University, and discuss the feasibilities of collaborative research/education.
This page was last updated on: October 04, 2012