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quarry regarding sap 2000 RCC building Model Analysis

 
This forum is locked: you cannot post, reply to, or edit topics.This topic is locked: you cannot edit posts or make replies. Thank Post    www.sefindia.org Forum Index -> E-conference on Durability of Concrete - Feb 27 to March 11 - 2012
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sagunshrestha
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Joined: 28 Oct 2011
Posts: 18

PostPosted: Sun Mar 04, 2012 9:47 am    Post subject: quarry regarding sap 2000 RCC building Model Analysis Reply with quote

Dear Sirs,

I have some quarry regarding sap 2000 RCC building Model Analysis and waiting for your valuable comments.

1.      I apply User coefficient for quake load of factor about (0.0Cool, should I expect the base share provided by the sap 2000results to be equal with the sum of Auto Seismic Loads to Horizontal Diaphragms?Actually it is equal when I don’t apply mesh in slab and beam- column. But when I apply mesh in slab (Area) or beam-column (frame) the sum of Auto Seismic Loads to Horizontal Diaphragms in of all level becomes less than base share!!!!Please have your valuable comment on this matter? Actually more the finer mesh size the larger reduction in sum of seismic loads to horizontal diaphragms obtained??? Shouldn’t the sum of horizontal seismic load be equal to Base Share?????  Why so? Note: sum of seismic load to all points is equal to the base share!!!!!!!!!!! But sum of seismic load to diaphragms is not equal????? (Here attached excel sample file). Should I apply seismic load separately?  

2.      Other thing I wanted to know is about “assigning the frame end length offset!!! “ my results are very different when I assign beam and column with “automatic from connectivity” and with “no offset!!!! “actually I found the % of reinforcement being very different in floors column!!!  What value of rigid zone value should be apply for RCC frame? “Zero rigid value Ok???” see uploaded a data with assigning the frame with end offset in beam-column and without end offset and also offset in beam only, offset in column only!!!!!!  


3.      When I provide Z beam in staircase the column joining to this Z beam always have more reinforcement!!!! Is this is because of short column effect?  

4.      Is it better to divide the frame/area or mesh the frame/area? I have never used divide option!



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