详情

Optimala betongbrol�sningar med h�nsyn till klimatp�verkan och investeringskostnad

项目名称：	Optimala betongbrol�sningar med h�nsyn till klimatp�verkan och investeringskostnad
摘要：	Previous studies at KTH have shown the successful application of modern optimization techniques on cost optimization of reinforced concrete slab frame bridges (M. Solat et al. 2014). However, decision-making for bridges is not only governed by criteria such as cost, technical feasibility and durability but in a sustainable design, environmental performance should also be considered. This requires use of multi-dimensional criteria which in its turn may lead to controversy: the most environmental friendly solution may not be the cheapest or the most efficient one with regard to the construction process. Such confliction should be considered and compromised at an early design phase. Life Cycle Assessment (LCA) is a comprehensive and standardized approach for quantifying all emissions, resource consumption and related environmental and health impacts linked to a service or product. It has the potential to provide a reliable environmental profile of the structure and can thus be used in a structural optimization context as a tool for decision-makers. However, the application of LCA on bridges is very rare and often performed too late to make design improvements possible. Therefore, the proposed research project attempts to integrate LCA with the design optimization procedure from the early planning phase. The aim in this context is to holistically consider several criteria including structural performance, environmental impact and the associated cost. The work will be performed in close collaboration between KTH and bridge design experts at ELU Konsult. In this proposal, structural optimization, considering both LCA and investment cost, will be performed on specific types of reinforced concrete bridges. The goal is to find the most sustainable designs by reducing the environmental impact and the investment cost by as much as 10-20% without compromising the functionality and constructability of the structures. A further aim is to examine the relation between optimal designs with respect to investment costs and the most environment-friendly solutions. Combinations of these two criteria will be examined in a multi-objective optimization. The output of this research work will be design tables, LCA diagrams and a guideline for optimal designs of RC bridges considering not only the investment cost but also the environmental impact. The project results will be directly implementable in the design of new RC bridges leading to sustainable, time-effective, material-efficient and economic bridge solutions.
资金：	0.00
资助组织：	Trafikverket, Sweden
项目负责人：	Karoumi, Raid
执行机构：	Kungliga tekniska h�gskolan
开始时间：	20160501
预计完成日期：	20180531
实际结束时间：	0