Bierrum Worldwide Ltd provided the design and specialist building tools for the building of two new cooling towers on the Trino Vercellese energy plant in northern Italy. Bierrum used LUSAS Civil & Structural to help with its design of the 90m excessive structures for its shopper, Italy�s largest energy company, ENEL (Ente Nazionale per l�Energia eLettrica).
The cooling towers, which had been some of the first to be inbuilt Italy, include many state-of-the-art options; together with �dry?cooling expertise and the incorporation of meridional help columns and a central chimney. On coming into service in June 1998 it grew to become ENEL�s first fashionable, greenfield Gas Turbine and Combined-Cycle Plant. Bierrum were liable for the whole structural design of the towers, as well as for the availability of all specialist development tools and supervision.
Each cooling tower is supported on a 5.Eight metre extensive by 2.Zero metre excessive standard strengthened concrete annular ring basis. The foundations incorporate plinths for every of the 36 pre-cast concrete assist columns. As each column weighed in excess of 90 tonnes subtle lifting and temporary works schemes have been designed to help set up. The tower shells had been constructed using a patented climbing entry and formwork system that supplied easy access to the working face and allowed a 1.5m carry of concrete to be constructed every working day.
Typical mode shapeStress contours from wind loading
Modelling and analysis
The tower shell, assist columns and ring foundation had been all modelled. LUSAS command information (helpful for creating households of constructions) have been used to each create the 2 thousand ingredient mannequin as well as assist within the processing of the outcomes. Loading on the structures included lifeless and wind masses, temperature results, earthquake loads and stresses because of the settlement of the foundations. John Turner, Bierrum�s Chief Engineer on the time and now of John Turner (Engineering Consultants) Ltd.