• Modeling a Structure with Wall shear

    Francisco Cartagena
    Francisco Cartagena
    Hello, I hope you are very well. 1. Why when I make models with walls (modeled with plates) and I do a spectral modal analysis with the IS1893 2002 standard, the participating mass of the modes does not reach 90% quickly, I have to place about 200 modes…
    • 3 months ago
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  • Response Spectrum Analysis & Design Forces Problem for Shear Wall Design in RCDC

    Ali Riza Yikilmaz
    Ali Riza Yikilmaz
    Hi everyone, I have faced a problem importing analysis forces from Staad Pro to RCDC for a shear wall example. I have performed seismic analysis by using the response spectrum method for a box-shaped and cantilever shear wall in StaadPro. I can determine…
    • Answered
    • 3 months ago
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  • No uplift while doing Response Spectrum Analysis

    Justin J
    Justin J
    While analyzing a structure for response spectrum seismic loading the response(base reactions, member end forces, etc.), comes to be in absolute value. This is due to the fact that the responses coming out of several modes are combined by using some predefined…
    • 4 months ago
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  • Modal Analysis Mass Distribution Uniformly along the length of member

    Asif Sani
    Asif Sani
    Is there an option in Staad to not lump the mass on nodes for Modal analysis and instead distribute the mass (like uniformly distributed load) along the length? This could be important as it may affect member design for response spectrum analysis. For…
    • 7 months ago
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  • What is the reason for designing of column without considering the worst load case even though I add several load combinations?

    Yadheesh Waran
    Yadheesh Waran
    In my model I analyze and design a G+8 RCC Structure, and the column is designed for only the first load case even though other load combinations give maximum axial force and moments. I attached the screenshots of output file below.
    • 8 months ago
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  • Staad.PRO Seismic Response Spectrum (CQC)

    Agustin Rowell
    Agustin Rowell
    Hi. I am working on a steel structure and i have some issues with the seismic loads. That are the flexure MZ diagrams for the pure seismic load case in X direction (longitudinal). It caught my attention the results for the beam element marked in…
    • over 1 year ago
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  • related to member fail in response spectrum analysis

    shanu kumar vishwakarma
    shanu kumar vishwakarma
    staad file with EQ analysis.rar I am designing a G+2 building but am unable to remove warnings. you can see the file I attached. if I am wrong please try to provide the sample file of response spectrum analysis file for reference.
    • Answered
    • over 1 year ago
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  • Vertical component of seismic load - NBCC

    Mahmoud Hassan
    Mahmoud Hassan
    Dear All, I am trying to consider vertical component of seismic load using National building code of Canada NBCC. I assume 70% of acceleration is vertical direction (see below), but I am getting errors. I would appreciate if you tell me where is the…
    • over 1 year ago
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  • PDELTA ANALYSIS WITH RESPONSE SPECTRUM LOAD CASE

    Raju Sahu
    Raju Sahu
    STAAD SPACE START JOB INFORMATION ENGINEER DATE 23-Aug-21 END JOB INFORMATION INPUT WIDTH 79 UNIT METER KN JOINT COORDINATES 1 0 17.2667 0; 2 2.59808 17.2667 -1.5; 3 0 17.2667 -3; 4 -2.59808 17.2667 -1.5; 5 -2.59808 17.2667 1.5; 6 0 17.2667 3; 7 2.59808…
    • over 2 years ago
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  • how can i eliminate this warning **WARNING: TENSION/COMPRESSION REQUESTED IN SAME RUN THAT INCLUDES A DYNAMIC ANALYSIS. and even after considering the Z direction in Response spectrum analysis i am not getting Z direction values

    Syed abdul matheen
    Syed abdul matheen
    PEB.RESPONSE SPECTRUM ANALYSIS.std
    • over 2 years ago
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  • How to apply sequence of loading for elevated water tank resting on sloping ground by using Response spectrum analysis?

    Anjali saindane
    Anjali saindane
    Hello.sir i m comparative study of elevated water tank resting on sloping ground & take slope varies from 0 to upto 30degree..I have dout in staad model.. actually I already model but my result not getting correct..means as per our study base shear will…
    • over 2 years ago
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  • RAM Frame Dynamic Analysis Criteria

    Joseph Donato
    Joseph Donato
    When performing a dynamic analysis for Response Spectrum in Ram Frame, is it correct to check the reduced stiffness for steel members in the criteria? I have a situation where I need to scale up my dynamic loads to achieve the 0.85*ELF forces. The question…
    • Answered
    • over 2 years ago
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  • Response Spectrum

    Thoudam Jagat Singh
    Thoudam Jagat Singh
    How to reference to the mass load can be done in physical model with respect to Response Spectra Loads?
    • Answered
    • over 2 years ago
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  • Warning when applying Response Spectrum Analysis

    Parishith J
    Parishith J
    Hello Experts, While analyzing the model by response spectrum analysis, I do receive the following warning while specifying seismic direction as "Y". ***WARNING : EARTHQUAKE MODE IS NOT AVAILABLE FOR X AND Z DIRECTIONS **** Whether this can be neglected…
    • over 2 years ago
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  • Response Spectrum Analysis as per Eurocode

    Parishith J
    Parishith J
    Hello Experts, I am not well versed with the dynamic analysis, since we could not perform linear static analysis for seismic load application as per Eurocode, Someone please guide me how to apply the response spectrum properly as per Eurocode. I tried…
    • over 2 years ago
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  • Dynamic Response Spectrum Inputs not affecting natural frequency results

    Jacob Cano
    Jacob Cano
    I am attempting to find the natural frequency of my staircase model as shown below using the total weight of the structure distributed evenly over every node as a nodal mass in the Ty direction. My issue is, I am able to get a frequency running the dynamic…
    • over 3 years ago
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  • RESPONSE SPECTRUM MODAL ANALYSIS

    SILVIA CONTI
    SILVIA CONTI
    Good morning, I'm trying to perform response spectrum modal analysis with Response spectrum user define data option on a multistory concrete building. The porpoise is to introduce in the FE model, seismic actions according to Italian design code (NTC2018…
    • Answered
    • over 3 years ago
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  • RAM Frame - IS 1893:2016 Response Spectra Analysis Scale Factor

    Daniel Slegh
    Daniel Slegh
    Could someone please confirm that scaling the Response Sectra Analysis generated in RAM Frame using the Indian Standard IS 1893:2016 code does not include an adjustment for the Zone Factor, Z? If this is the case, I would assume the scale factor should…
    • Answered
    • over 3 years ago
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  • Very Low Base Shear and Sign to be used for Loads

    Prash1730
    Prash1730
    Dear All, I hope you are all doing well. I am in the middle of a crucial assignment for which I am doing Response Spectrum analysis using custom spectrum. Base Shear and load sign.txt Seismic Spectrum.xlsx Client has provided the Ct and x values…
    • over 3 years ago
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  • Error no unsupported masses entered - check densities in seismic definition

    Subin kumar
    Subin kumar
    Dear all, Error found during the seismic definition analysis. Found the error "no unsupported masses found - check densities" . Kindly help me out from this . COLLEGE PROKECT.STD
    • over 3 years ago
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  • Unrealistic Deformation on Rigid Diaphragm in Ram SS

    Felix Dong
    Felix Dong
    Hi, I am currently modelling a 4 story concrete building with a single core with two levels of basement. I am trying to run the spectral analysis using AS1170.4 and I have set all my floor diaphragms to rigid diaphragm. The model dissipation for each…
    • over 3 years ago
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  • STAAD.PRO CONNECTION Need help to solve: "Error: External component has thrown an exception".

    Leonardo Ribeiro
    Leonardo Ribeiro
    Hello, good afternoon! The company I work for have recently installed the Staad.Pro CONNECTION V.22.02.00.26 in my PC, but it's not working well. For Analytical models or Building models, it works normally, but whenever I try to create or open a…
    • over 3 years ago
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  • Euro Code 8 Response Spectrum Seismic Analysis

    Sellappan Karthick
    Sellappan Karthick
    Dear STAAD Users, Please let me know why STAAD Pro is not graphically showing the vertical shear distribution of base shear calculated by using Euro Code 8 Response Spectrum. Please advise me how to know or how to calculate the vertical shear distribution…
    • over 4 years ago
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  • question regarding response spectrum analysis

    Rahul Sarker
    Rahul Sarker
    Hello Engineers, I have some question regarding response spectrum analysis. Your help is needed I HAVE DESIGNED A 10 STORY STEEL BUILDING WITH ALL STATIC LOAD COMBINATION AND PASSED ALL MEMBER AS PER CODE.THE DEFLECTION AT TOP IS 142 MM AND WHICH…
    • over 4 years ago
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  • RAM Frame Response Spectrum Base Shears

    Jeff_C
    Jeff_C
    I have a 2-story building modeled in RAM SS (v14.07), and I'm using Response Spectrum analysis in RAM Frame. The model contains a ground level framed floor, a raised 2nd floor, and a roof. The base is at the ground level framed floor (not the base). I…
    • Answered
    • over 8 years ago
    • RAM | STAAD | ADINA
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