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  • Users: Jwiggins
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  1. Jwiggins

    Converting 5% damped response spectrum to 2% damping

    The USGS spectral response graphs are all based off of 5% damping, however IEEE-693 (6.9) and ASCE 113 (5.6.2.1) for electrical substation design both state that a maximum damping value of 2% must be assumed for all structures. These structures are basically inverted pendulums supporting...
  2. Jwiggins

    Converting 5% damped response spectrum to 2% damping

    The USGS spectral response graphs are all based off of 5% damping, however IEEE-693 and ASCE 113 for electrical substation design both state that a maximum damping value of 2% must be assumed for all structures. Is there a good way to convert the USGS 5% damped response spectrum into a 2%...
  3. Jwiggins

    Finding Ss and S1 values for a structure with 2% damping

    The USGS spectral response graphs are all based off of 5% damping, however IEEE-693 and ASCE 113 for electrical substation design both state that a maximum damping value of 2% must be assumed for all structures. Is there any way to convert the USGS 5% damped response spectrum into a 2% damped...
  4. Jwiggins

    Cable Connection (Pulley/Roller)

    I'm designing a simple guyed structure where the guy wires are strung across horizontal arms. Typically called a "Sidewalk" guy. The guy cable starts by attaching to the top of the pole and then drapes across a frictionless pulley on the extended horizontal arm before anchoring to the ground...

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