Inelastic earthquake control of weld failure Part II: Probability theory

✍ Scribed by Wong, Kevin K. F. ;Hart, Gary C.

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 260 KB
• Volume: 8
• Category: Article
• ISSN: 1062-8002
• DOI: 10.1002/(sici)1099-1794(199912)8:4<307::aid-tal138>3.0.co;2-v

✦ Synopsis

Active structural control of inelastic response is proposed on an existing building as a method to reduce the risk of steel building weld failure. Probability theory of analysis using maximum plastic rotation as the random variable is performed to study the number of earthquake records needed in order to accurately predict the probability of failure. Based on the characteristics of the plastic rotation, a new probability density function is developed that consists of both discrete and continuous random variables. Forty-nine earthquake ground motion time histories are used in this study, and numerical simulations show that at least 40 earthquake ground motions are necessary to accurately predict the probability of failure, which is contrary to the design criteria provided by the Uniform Building Code. The probability density function is then used to design the control system, and in the process the use of structural control is shown to be very effective in reducing the risk of weld failure to an acceptable level.