Structural design loads on temporary spatial structures

Abstract

In this paper, the issue of design load on reduction in the structural design of temporary spatial structures is discussed using risk analysis tools. In chapter 2, actions due to loads are classified into two categories from the viewpoint of occurrence prediction. In addition, it will be shown that, when assuming target levels for design loads in structural design of spatial structures, both ordinary economic loss and loss of priceless possessions including human life have to be considered. Chapter 3 shows that; 1) reduction of design loads has economic advantage and leads to better cost performance in the range of shorter working years, 2) on the other hand, risk to priceless possessions and human lives in TSS are far bigger than that in ordinary spatial structures, and in order to reduce the risk to those in TSS, occurrence probability of safety limit load for TSS has to be reduced to the same level as for ordinary structures. In chapter 4, introduction of the safety control system is investigated for reducing structural design loads.