https://communities.bentley.com/products/ram-staad/f/ram-staad-forum/245367/no-uplift-while-doing-response-spectrum-analysisWhile 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 predefineden-USTelligent Community 12https://communities.bentley.com/thread/765769?ContentTypeID=1Tue, 16 May 2023 06:56:07 GMT6dad98f5-dbc9-4c4d-a9ba-e9da8dc6aa8e:a62aa432-727c-4fe0-b6ea-044765081ff3Abhisek M<p>hello,</p> <p>You can use the signed response spectrum option as discussed in the below link.</p> <p>&nbsp;<a href="https://communities.bentley.com/products/ram-staad/f/ram-staad-forum/123938/signed-response-spectrum">Signed Response Spectrum</a>&nbsp;</p><div style="clear:both;"></div>