A question about the calculation of the response factor within RAM Concept:
When reading the RAM Concept Manual to understand how the response factor is calculated within RAM, the manual states that the baseline acceleration, alpha,RMS = 1 m/s2 (see snapshot below).
When reviewing the associated literature which the vibration analysis in RAM Concept is based off (Concrete Centre & P354), the concrete centre states that the response factor is calculated by dividing the calculated (or measured) RMS acceleration by the baseline acceleration. According to P354 the baseline acceleration is 0.005 m/s2 (see the snapshot below)
And from the concrete centre, the measure acceleration RMS can be evaluated from the graph shown below:
To achieve a response factor of 1, the measured acceleration RMS would be 0.005m/s2, and for frequencies above and below the range of 4-8Hz, this would result in a greater response factor due to a larger measured acceleration. However, I cannot see where a baseline acceleration value = 1m/s2 can be found, as per the RAM manual. Is the information in the RAM Concept manual a typo? Should baseline acceleration value be 0.005m/s2 and the response value limit is =1? Can someone provide an explanation to the calculation of the response factor in RAM please.
Thanks.