详情

Förstudie: Ökad kapacitet för tunga fordon hos befintliga vägbroar

项目名称：	Förstudie: Ökad kapacitet för tunga fordon hos befintliga vägbroar
摘要：	The development of trucks in recent years has resulted in increased comfort for professionals in the transport industry. One of the reasons is that air suspension is used on heavy vehicles, which continuously adjusts the truck's suspension according to load weight. Our assessment is that this also has a positive impact on civil engineering designs as the dynamic effects of the vehicle decrease. Increased cooperation between the automotive and construction industries would thus make us use our existing designs more efficiently. When designing road bridges, traffic is normally considered as a static load. To include the effect of moving traffic, the load is multiplied by a dynamic addition. This factor is affected by the dynamic system of both the vehicle and the bridge, as well as unevenness in the road. In current norms for classification calculations in Sweden, the magnification factor is evaluated according to an empirical formula that depends on determining length of the bridge and the vehicle's maximum permissible speed. This method is presumed to be very conservative for some vehicles and bridges since the equation does not include all relevant parameters. In the proposed pre-study, a "state-of-the-art" literature study will be done, as well as numerical simulations for a couple of bridges. This will be achieved with refined calculation models that include vehicle-bridge interaction, as well as unevenness in the roadway. A reduced dynamic magnification factor has a positive impact on the environment as an existing bridge can be allowed to be used with heavier traffic without the need to replace or strengthen it. The results of the pre-study will be presented in a technical report that will form the basis for future project applications. The long-term goal is to develop a simplified model for road bridges to calculate the dynamic magnification factor. Unlike the model that is the norm today, the new model must take into account the dynamic system of the vehicle and the bridge.
资金：	0.00
资助组织：	Trafikverket
项目负责人：	Plos, Mario
执行机构：	Chalmers tekniska högskola AB
开始时间：	20200401
预计完成日期：	20210630
主题领域：	Bridges and other structures；Operations and Traffic Management；I24: Design of Bridges and Retaining Walls