Lead Rubber Bearing Properties in SAP2000 - Printable Version +- Civil Engineering Association (https://forum.civilea.com) +-- Forum: Civil Engineering Resource (https://forum.civilea.com/forum-1.html) +--- Forum: Civil Engineering Documents (https://forum.civilea.com/forum-89.html) +---- Forum: Engineering Spreadsheet (https://forum.civilea.com/forum-43.html) +---- Thread: Lead Rubber Bearing Properties in SAP2000 (/thread-39692.html) |
Lead Rubber Bearing Properties in SAP2000 - pezhmankhan - 11-12-2012 Input your data in INPUT sheet and get outputs in SAP2000 sheet. I'm waiting for your opinion. Code: *************************************** RE: Lead Rubber Bearing Properties in SAP2000 - ruaumoko - 09-10-2014 Dear pezhmankhan , thank you very much for this useful file. I'm wonder if you could advise where is coming the value of effective damping (0.038) of your example (tab sap2000 : for U2 & U3). what units should have this property ? In the input tab I couldn't find this value to see the equation used. Or is a typo and should be 0.088 ? please confirm really appreciate your comments, thanks in advance, RE: Lead Rubber Bearing Properties in SAP2000 - pezhmankhan - 09-10-2014 Hi, When you defined effective damping of isolators in SAP2000 (in the horizontal direction, U2 & U3), you should deduct the damping ratio of superstructure from it. Software will automatically add damping ratio of superstructure to effective damping of isolator. So I put unit to kN-mm and after that I deductive 0.05 from effective damping to consider 5% superstructure damping. RE: Lead Rubber Bearing Properties in SAP2000 - ruaumoko - 09-10-2014 Thanks for your time ! pezhmankhan, This mean, the unit is a ratio in the input of SAP2000? Im a bit confuse, when I read in the CSI knowledge base website where explains the unit of effective damping is Force-Second/Length or Force/Velocityā€¯ I misunderstand something? thank you very much, [/code] RE: Lead Rubber Bearing Properties in SAP2000 - pezhmankhan - 09-10-2014 Yes, You are true. But in HOLMES spreadsheet they defined effective damping such this. And because this spreadsheet is written by Trver Kelly, I am sure that this way is true. |