Seismic Design of Elevated Slurry Storage Tanks （泥浆储罐抗震设计的升高）.pdfVIP

Seismic Design of Elevated Slurry Storage Tanks for AS/NZS 1170 1 J. Rosart 1 Design Engineer, Outotec Pty Ltd, Sydney. Email: j oel.rosart @ Abstract Australia’s structural design actions standard, AS/NZS 1170, has been written with an emphasis on the requirements for new buildings and building-like structures. Consequently, the Australian earthquake actions section, AS1170.4, considers many non-building structures, including tanks containing liquid, to be outside its scope. A variety of elevated steel tanks are common in industrial and mining applications, so an engineer in Australia must look elsewhere for seismic design guidance. An alternative design code commonly referred to is API 650, “Welded Steel Tanks for Oil Storage”. This code refers to ASCE 7 for methodology but explicitly excludes elevated tanks when evaluating seismicity. It also assumes a homogenous liquid, but process tanks can contain mixtures of liquids, slurries and solids. The American ASCE 7 code, “Minimum Design Loads for Buildings and Other Structures” has seismic design actions for many non-building structures, including elevated storage tanks. Fluid properties and tank shapes are not restricted. This paper will present a methodology for applying AS1170.4 seismic parameters to ASCE 7 for seismic design of elevated slurry storage tanks. The seismic loads calculated are for limit states design and are therefore compatible for load combinations to AS/NZS 1170.0. Keywords: elevated tank, thickener, ASCE 7, liquid storage, slurry, sloshing 1. INTRODUCTION Outotec Pty Ltd designs mining and industrial thickeners for Australia and overseas. A common tank design is a cylindrical steel