THE FIRST USE OF UHPC (DUCTAL ? ) TECHNOLOGYFOR AN INNOVATIVE LRT STATION CANOPY-SHAWNESSY, CALGARY, AB

摘要

Twenty-four unique, thin-shelled canopies (5.1 m × 6 m and just 2 cm thick)supported on single columns, protect commuters from the elements at Calgary's new ShawnessyLRT station. The innovative design was made possible with a new, ultra-high performance, fibrereinforced material that offers a unique combination of superior technical characteristics includingductility, strength and durability while providing highly moldable products with a quality surface.The material provides compressive strengths of up to 200 MPa and flexural strengths up to 50MPa. The mechanical properties and design flexibility facilitated the architect and engineer'sability to create the thin, curved, off-white shell structure. This paper presents the fundamentals ofthe technology, material properties, design details, manufacturing, prototyping, full-scale loadtesting, erection and economics. Many economies gained from this new technology are a result ofengineering new solutions for old problems. By utilizing the material's unique combination ofsuperior properties, designs can eliminate passive reinforcing steel and experience reduced globalconstruction costs, formworks, labour and maintenance. Additionally, this relates to benefits suchas improved construction safety, speed of construction, extended usage life and others.