| Popis: |
Structures are generally regarded as having many attributes, including: 1) are self-supporting, 2) have the capacity to support gravity loads, and 3) have the capacity to resist seismic forces imposed at their base. Building codes historically are most interested in life safety and have historically concentrated on prescribing requirements for buildings occupied by the general public. Over time, the existence of nonbuilding structures has been acknowledged by building codes, with prescription requirements gradually being incorporated based on the performance of building structures. They have also recognized that some nonbuilding structures have building like systems (industrial frame structures, pipe racks) and some don't (tanks, vessels, silos, chimneys, cooling towers, etc.). This paper will show how nonbuilding structures similar to buildings have been handled in past building codes and summarize proposed changes for future building codes. |
