Multiframe tutorial Copyright Prof Schierle 2011 1Defines structures by:• Members connecting• Joints (X, Y, Z-coordinates) for structural design / analysis3D Model: 90’x90’; 8 stories @ 14’Frame WindowIn View select American units and 0 decimal #s3 bays 30’ bay size4 frames 30’ spacingBeams W18x211Columns W14x233(orient center columns to resist north-south load;assign beam/column moment resisting joints)Floor bracing: ST 6x6x1/2 (substitute floor diaphragm)Load WindowGravity beam load 3 klf (100psfx30’/1000)Lateral joint load 12k (~28psfx30’x14’/1000)Multiframe tutorial Copyright Prof Schierle 2011 2Select columns individuallynot as a group, otherwise beams would rotate as wellRotate 2 column rowsto resist north-south loadSelect vertical members to size columns, horizontalmembers to size beamsIn Front View select column bases to Restrain them as moment resistant jointsMultiframe tutorial Copyright Prof Schierle 2011 3Draw braces from column tocolumn not as single lines!Use Member Release tosimulate pin joint braces Duplicate braces 7 timesfor all 8 levelsSelect braces and assign ST 6x6x1/2Select horiz.members forglobal distributedLoad (3klf)Select left joints forjoint load (12k)SelectLoadWindowRe-selectFrame Window(add bracesafter loadto avoid loadon braces)Multiframe tutorial Copyright Prof Schierle 2011 4Plot bendingmoments, etc.Plot bendingstress and combinedaxial+bending stress, etc.Click any member for detailed infoMove dotted bar to get respective info SelectCaseAnalyze Staticto analyze structureSelectWindowPlotTo plot resultsSelectDisplayActions (k, k’)orStress (ksi)Multiframe tutorial Copyright Prof Schierle 2011 5Plot shearstressPlot axialstress3-d animationPlot deflectionand combinedaxial+bendingstress(assignmax. stressfor stress barred = 22 ksi)Multiframe tutorial Copyright Prof Schierle 2011 6Clip side bays to add bracing tocenter bay onlyIn Front Viewselect center bay beams, divide them to add bracingUse member release to assign pin joints to bracingDuplicate bracing 7 timesin minus y-directionThen duplicate bracingonce in z-directionSelect no clippingSelect sloping members Assign TS 6x6x1/2 tubingAnalyze again andrepeat above