Input ground-motion in free-field site response analysis
Hello there,
I am performing a free-field site response analysis.
Plaxis's Manual suggests to set a " Compliant base " for the bottom boundary and " Free-field " for the lateral boundaries.
Now, in my specific case i have an outcropping ground motion…
02. How you define a Seismic load combination in AutoPIPE?
Applies To
Product(s):
AutoPIPE
Version(s):
ALL;
Area:
Load case
Date Logged & Current Version
Aug 2023 23.00.00.230
Problem:
How you define a Seismic load combination in AutoPIPE?
Solution:
To include the…
Free field boundary conditions for PLAXIS 2D: new improvements and recommendations for practical use
Application
PLAXIS 2D
Version
PLAXIS CONNECT Edition V22 Update 2 PLAXIS 2D 2023.1
Date created
20 March 2023
Date modified
20 March 2023
Introduction
One of the greatest challenges in dynamic finite element analysis…
Seismic Analysis - Moments Discrepancy
Question:
Discrepancy was found between the member forces plotted in the “MEMBER FORCES AND MOMENTS” table of the output listing file and the forces used for the member checks from the “Review/Redesign” dialog box in the Postvue data base directory…
12. Pushover
The 12nd option in the RM Bridge Enterprise Training Examples, 12. Pushover has the datasets and a description document for modeling and analysis of a Pushover bridge structure. It can be accessed at File\Examples\Training Examples by selecting 12. Pushover…
5. Earthquake - Response Spectrum
The option 5. in the RM Bridge Enterprise Training Examples is the Earthquake that has the datasets and a description document for the seismic analysis of a three span bridge using the response spectrum analysis with all necessary steps as listed below…
Time History Analysis
Greetings,
As understand from the SACS Help manual, while running time history analysis, one can define 3 time history function in one file.
I have few questions on this analysis as below,
1) How to decide the Directionality Factors? As per help…
CQCX - complete quadratic combination without sign adjustment
CQCX is the variant of the complete quadratic combination working without adjusting the sign of the result values . It's considered an evolution of the CQC rule. The following formulas are used in CQCX:
Rk,tot,max = √abs(ΣΣRk,i*ρij*Rk,j) and
Rk,tot…
Superposition Rules
Superposition Rules are used to combine the contributions of the individual natural modes in the final Seismic result including all. As shown in the image below, in the pull-down menu, the options are:
ABS - Absolute values
SRSS - Square Root of Sum…
Earthquake Load: Seismic events
In RM Bridge Schedule \ Load Definition \ Earthquake Load users can define the input for all seismic events to be analyzed in the structure. The Loads are called by the specified number and defined by the reference Modal-File *.mod that includes the model…
09. How to apply Seismic loads to part of model and not to complete model?
Applies to
Product(s):
AutoPIPE
Version(s):
ALL;
Area:
Modeling
Date Logged & Current Version
May. 2019 12.00.00.14
Problem:
How to apply Static Seismic G factor to part of the model, instead of the whole model…
Fundamentals of pseudo-static analysis in PLAXIS
Application
PLAXIS 2D PLAXIS 3D
Version
CONNECT Edition V20 and later
Date created
1 May 2020
Date modified
2 December 2022
Mechanisms developed in pseudo-static analysis
General aspects
Although time-domain…
PLAXIS 2D and 3D applications in geotechnical earthquake engineering
Application
PLAXIS 2D PLAXIS 3D
Version
PLAXIS 2D PLAXIS 3D
Original Author
A. Laera
Date created
02 November 2015
Date modified
24 October 2016
In current design practice, geotechnical earthquake engineers…
Free-field soil displacement due to lateral spreading load during earthquake
Dear sir,
During earthquake, soil liquefaction might be a concern especially when non-liquefied layer is underlying by liquefied soil.
Lateral spreading load due to non-liquefied soil movement on top of liquefied layer might be critical for pile…
Response Spectrum Matching Ground Motion
Dear Sir
Does SACs has any options to create Matching Input Time History to Target Response Spectrum i.e. Spectral Matching to Uniform Hazard Spectrum or Conditional Mean Spectrum?
if it is possible, please help to suggest the command or provide some…
08. How are "Sustained + Earthquake + Seismic Displacements" combined in an AutoPIPE model?
Applies To
Product(s):
AutoPIPE
Version(s):
ALL;
Area:
Combination
Date Logged & Current Version
April. 2018 11.03.00.08
Problem:
How are "Sustained + Earthquake + Seismic Displacements" combined in an AutoPIPE…
Direction of Earthquake Equivalent Static Loads
Hi Bentley Staffs,
Can you help to elaborate the sentence below a bit ?
I cut this from Dynamic Response Manual Section 2.2.1.3.2 Equivalent Static Loads
If I choose 'A' option in col.10 of EQKLOD, 20 EQ load cases will be generated in OCI…
13. What is the difference regarding seismic calculation between SLS (Serviceability Limit State) and ULS (Ultimate Limit State) when using AutoPIPE Vessel?
Applies To
Product(s):
AutoPIPE Vessel
Version(s):
ALL
Environment:
N/A
Original Author:
Bentley Technical Support Group
Date Logged & Current Version
July. 2017 40.03.00.08
Problem:
Except for accelerations…
RE: spectral analysis with dynamic response module
Hi aaa123,
I understand that your question is
Do you need to split SPLOAD command to be 3 commands for X Y and Z.
The answer is "NO NEED".
You can make it the same line. Directional spectrum will be combined by using SRSS method by SACS default…
Seismic Response Spectrum - Equivalent Static Load
Dear Sir,
I am curious about Equivalent Static Loads generated from Dynamic Response Module when we used ' Response Spectrum ' Approach.
Theoretically, for modal response, internal member force and moment for each mode will be combined by CQC or SRSS…
IS 1893-1 2002 Story Drift
Applies To
Product(s):
STAAD.Pro
Version(s):
ALL
Environment:
ALL
Area:
STAAD.Pro Analysis Solution
Subarea:
Seismic Analysis
Original Author:
Bentley Technical Support…
Seismic Analysis
Applies To
Product(s):
STAAD.Pro
Version(s):
All
Environment:
N/A
Area:
Analysis Solutions
Subarea:
Seismic Analysis Solutions
Original Author:
Bentley Technical Support…
Torsion consideration in IS 1893-2002 seismic analysis
Applies To
Product(s):
STAAD.Pro
Version(s):
All
Environment:
N/A
Area:
STAAD.Pro Analysis Solution
Subarea:
Seismic Analysis
Original Author:
Bentley Technical Support…
Seismic Load Based on IBC 2009 ASCE 7-10
Dear All,
Does StaadPro provide the seismic load definition based on IBC 2009 and or ASCE 7-10?
I checked but I only found IBC 2006 (which refer to ASCE 7-05).
And the default is using Zip Code to determine the Ss and S1, is this Zip Code based…