Nomogram of use for risk-targeting in the context of seismic design
figureposted on 09.05.2019 by John Douglas
Figures are generally photos, graphs and static images that would be represented in traditional pdf publications.
Nomogram showing the sensitivity of the ratio lambda_ref/lambda_c to the values of X, beta and k1 within the context of risk-targeted seismic design. The isopleths show two example calculations using this graph by connecting with straight lines choices of lambda_ref/lambda_c and X and reading off the value of k1.
lambda_ref is the mean annual frequency of exceedance of S_a^ref
lambda_c is the mean annual frequency of collapse
X is the probability of collapse
beta is Standard deviation of S_a^c
k1 is the slope of the seismic hazard curve in log-log space
S_a^c is the pseudo-spectral acceleration at collapse
S_a^ref is the pseudo-spectral acceleration corresponding to ref
See Gkimprixis et al. (Comparison of methods to develop risk-targeted seismic design maps, doi: 10.1007/s10518-019-00629-w, 2019) for more details. This figure is Figure 11 of that open-access paper.
This nomogram was produced using Pynomo using Type 10 equations for three values of beta.