ASCE 7-05 CHAPTER 22 PDF

ASCE 7-05 CHAPTER 22 PDF

ASCEJSEI Minimum Design Loads for Buildings and Other. Structures In the margin of Chapters 1 through 10, a bar has been placed to respect to its. motions in accordance with ASCE 7, excluding Chapter 14 and Appendix 11A. . T = long-period transition period, (given in ASCE Figure 22), which is the. ASCE Chapter 12 Seismic Design Requirements for Building Structures ASCE Chapter 22 Seismic Ground Motion and Long-Period Transition.

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Determine the zip code of the site under consideration.

Seismic Ground Motion Values

You may also manually input the value of Ss and S1 mentioned in equation STAAD determine Ss 7–05 site class B if the same has not been input manuallyyou will find this mentioned in equation The parameter Ss shall be determined from the 0.

The parameter S1 shall be determined from the 1 s spectral response accelerations shown on Figs.

Where S1, is less than or equal to 0. Determine the site class. It is explained in section The Ss and S1 values obtained in step 3 are for site class B. chapfer

If the actual site class, as obtained in step 2, is something besides “B”, then, an adjustment needs to be made. This is what leads to the calculation of Sms and Sm1 as mentioned in equations To do this, one needs Fa and Fv. Fa and Fv are obtained from table Next, go to Table Alternatively, go to Table It depends on type of resisting structures. It is also defined in Table These are used in sections Specify the site class as determined from step 4.

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Determine Ct and x.

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Ct is building period coefficient and x is the exponent used in the calculation of approximate time period by eqn These two parameters depend on the type of structure and are explained in Table It is correct that the Ct value and x are dependent on the structure type. So for these values to be considered correctly it is necessary for the software to understand whether the frame is a moment frame or a braced frame or whether it is completely restrained against lateral movement non sway type or free to move laterally or whether it is made of steel, concrete or any other material.

Whereas it is possible for the software to figure out the material, currently there is no way to input the other information.

So based on the material it assumes a reasonable value 7-055 Ct 0. It is because of this limitation that we provide the users with the option to define terms like Ct, Px, Pz etc. Ct when specified is used in computation of Ta. Moreover the user can directly specify Px and Pz which if specified are considered as fundamental periods in the respective directions.

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At each joint where a weight is located, the lateral seismic force acting at that joint is multiplied by this lever arm to obtain the torsional moment at that joint. Details of loads generated chpter a node by node basis.

ASCE Minimum Design Loads for buildings and other Structures | usp usp –

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SantoS over 4 years ago. I tried to calculate Ta but can’t find the same value as calculated by Staad. Up 0 Down Reply More Cancel.

Anonymous over 8 years ago. How do i get rid of the warning saying that i need to specify whether tension or compression.