Design Response Spectrum to ASCE 7-16

Verified by the CalcTree engineering team on 23 September, 2024
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This calculator generates the Design Response Spectrum according to the ASCE 7-16 standard. The tool provides essential information for structural engineers to assess seismic demands and design structures to withstand earthquakes.
All calculations are performed in accordance with ASCE 7:2016 Chapter 11 - Seismic Design Criteria.
Calculation1. Definitions1.1 Seismic parameters
Values of mapped acceleration parameters and other seismic design parameters are provided at the U.S. Geological Survey (USGS) website 
﻿﻿SS
:0.421​
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0.2 sec Spectral Accel
USGS Seismic Design Geodatabase
﻿﻿S1
:0.324​
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1.0 sec Spectral Accel
USGS Seismic Design Geodatabase
﻿﻿T_L
:6s​
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Long-Period Transition Period 
Figs, 22-14 to 22-17
﻿﻿Soil
:C. Very dense soil and soft rock​
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Site Class 
Table 20.3.1
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2. Results2.1 Spectrum
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﻿﻿Scale
:log​
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X-Axis Scale
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2.2 Site information
﻿﻿Fa
:1.300​
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Short-Period Site Coefficient
Table 11.4-1
﻿﻿Fv
:1.500​
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Long-Period Site Coefficient for a period of 1.0sec
Table 11.4-2
﻿﻿SMS
:0.5473​
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Adjusted for site effects  for short periods
Eq 11.4.3
﻿﻿SM1
:0.4854​
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Adjusted for site effects  at 1sec
Eq 11.4.3
﻿﻿T_0
:0.18s​
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Basic Period
Cl 11,4.5-2
﻿﻿T_S
:0.89s​
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Short Period
Cl 11,4.5-2
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2.3 Calculated Values for Response Spectrum Curve
﻿﻿S_DS
:0.365​
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Design Spec Resp Accel parameter at short periods.
Eq. 11,4-1
﻿﻿S_D1
:0.324​
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Design Spec Resp Accel parameter at 1sec period.
Eq. 11,4-2
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