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... | @@ -18,7 +18,7 @@ This is an optional input. Users can input a string of characters (such as "Offi |
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# **Output**
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# **Output**
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The application uses three iterations to arrive at a ground motion value corresponding to a 1% probability of collapse in 50 years.
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The application uses three iterations (briefly described here) to arrive at a ground motion value corresponding to a 1% probability of collapse in 50 years. For more information about the calculation procedure, please see the paper by Luco, et al. noted in the References section.
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## First Iteration
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## First Iteration
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The application begins by using the uniform hazard ground motion (UHGM) with a 2% probability of being exceeded over a 50 year time period. This value is obtained during Step 1 and is used to arrive at an initial Probability of Collapse in 50 years in Steps 2 through 5.
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The application begins by using the uniform hazard ground motion (UHGM) with a 2% probability of being exceeded over a 50 year time period. This value is obtained during Step 1 and is used to arrive at an initial Probability of Collapse in 50 years in Steps 2 through 5.
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... | @@ -48,8 +48,6 @@ If the Conditional Probability of Collapse calculated during Iteration 1 exceeds |
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## Final Iteration
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## Final Iteration
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With the First and Second Iterations bracketing the target probability of collapse (1%), the ground motion for the Final Iteration can be precisely selected during Step 1 to result in Steps 2 through 5 to correspond to a 1% probability of structural collapse. This ground motion value is referred to as the risk-targeted ground motion, or "RTGM". The Risk Coefficient, or "RC", is simply the ratio of the RTGM divided by the uniform hazard ground motion ("UHGM").
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With the First and Second Iterations bracketing the target probability of collapse (1%), the ground motion for the Final Iteration can be precisely selected during Step 1 to result in Steps 2 through 5 to correspond to a 1% probability of structural collapse. This ground motion value is referred to as the risk-targeted ground motion, or "RTGM". The Risk Coefficient, or "RC", is simply the ratio of the RTGM divided by the uniform hazard ground motion ("UHGM").
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For more information about the calculation procedure, please see the paper by Luco, et al. in the References section.
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## Output summary (yellow box)
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## Output summary (yellow box)
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This section provides the risk-targeted ground motion (RTGM) corresponding to a 1% probability of collapse in 50 years. The uniform hazard ground motion (UHGM) used as a starting point for the calculations is provided, as is the Risk Coefficient (RC) representing the ratio of RTGM to UHGM for the site of interest.
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This section provides the risk-targeted ground motion (RTGM) corresponding to a 1% probability of collapse in 50 years. The uniform hazard ground motion (UHGM) used as a starting point for the calculations is provided, as is the Risk Coefficient (RC) representing the ratio of RTGM to UHGM for the site of interest.
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