https://communities.bentley.com/members/a75007c4_2d00_f915_2d00_464f_2d00_be96_2d00_7be9a86c9cdbJustin J's recent activityen-USTelligent Community 12https://communities.bentley.com/achievements/460ac7df-7ccc-4c42-a204-9e05eef3be09Tue, 16 May 2023 00:50:02 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:efe546c6-4a7b-43fe-979e-59cec5814072Ask a question in a forum.https://communities.bentley.com/products/ram-staad/f/ram-staad-forum/245367/no-uplift-while-doing-response-spectrum-analysisTue, 16 May 2023 06:36:25 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:082fa67c-0682-443c-b7f0-21247b198429Justin J<p><span>While analyzing a structure for response spectrum seismic loading the response(base reactions, member end forces, etc.), comes to be in absolute value.</span><br /><br /><span>This is due to the fact that the responses coming out of several modes are combined by using some predefined methods like SRSS or CQC &amp; thus the result is always +ve or absolute value.</span></p> <p><span>Actual push-pull of support reactions, coming out of horizontal loading on structure, does not come into the picture.</span></p> <p><span>While I check the reaction, the support only shows up compression value, and no tension /uplift is generated.&nbsp;</span></p><div style="clear:both;"></div>