Research on Performance Matrix for Robustness of Steel Tall Buildings

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The aim of this research is to establish the scheme and methodology of performance design, in which structural robustness and construction cost is balanced during the design procedure on the basis of common understanding about building performance between designers and customers. The following major findings were achieved :1.The performance-based design in USA and EU were surveyed, referring to which the main fame of performance design feasible to Japan practice was established with the four categories of performance, i.e., functional, undamaged, reparable, and life safe levels.2.The cost and techniques of actually repaired buildings that were damaged during the 1995 Hyogoken-nanbu Earthquake were investigated, through which the relationships between repair cost and damage level are clarified, and the reparability limit state was defined in a mathematical form.3.Seismic damage analyses of buildings were conducted by means of numerical simulator which was developed in this project, from … More which the evaluation method of residual deflection are proposed for the reparability limit design.4.Fracture performance of steel structures, the data of which were not sufficient in the past research, were experimentally investigated, from which the relationships between seismic hysteresis and fracture were figured out.5.A large amount of past test data on buckling behaviors of steel members were extensively surveyed, from which data-base required for performance design was established.6.The limit behaviors of non-structural elements such as curtain walls and window glasses and building equipment such as air condition, ventilation, electricity, sanitary, and machinery were investigated on the basis of actually sustained damage during the Earthquake. From this, their performance descriptions were activated in the same manner of structural skeletons.7.A guideline of performance-based design for whole steel buildings including structural, non-structural, and equipment parts was established. The guideline was published in a volume and distributed in a symposium. Less