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1、建筑框架练习4梁模型4.梁模型建筑框架确定建筑物框架由于重力和0.25psi的“雪载荷”引起的变形和应力。假定:数据库文件含几何模型和已定义的材料特性。January30,2001Inventory#001444W4-4.梁模型建筑框架1.按教师指定的工作目录，用“bldg”作为作业名，进入ANSYS。2.恢复“bldg-geom.db1”数据库文件,然后画线，观察完整几何模型。January30,2001Inventory#001444W4-4.梁模型建筑框架3.定义三种工字型截面和一种箱型截面，然后存储数据
2、库。MainMenu>Preprocessor>Sections>-Beam-CommonSectns..ID=1,Name=column,Sub-Type=IW1=12,W2=12,W3=12.12,t1=0.605,t2=0.605,t3=0.39按[Apply]ID=2,Name=girder,Sub-Type=IW1=10.425,W2=10.425,W3=16.97,t1=0.985,t2=0.985,t3=0.585按[Apply]ID=3,Name=beam,Sub-Type=IW1=6.535,
3、W2=6.535,W3=8.06,t1=0.465,t2=0.465,t3=0.285按[Apply]ID=4,Name=peak,Sub-Type=(hollowrectangle)W1=6,W2=6,t1=0.25,t2=0.25,t3=0.25,t4=0.25按[OK]在工具条上按SAVE_DBJanuary30,2001Inventory#001444W4-4.梁模型建筑框架3.(续)或使用命令:/PREP7SECTYPE,1,BEAM,I,COLUMNSECDATA,12,12,12.12,.605,
4、.605,.39SECTYPE,2,BEAM,I,GIRDERSECDATA,10.425,10.425,16.97,.985,.985,.585SECTYPE,3,BEAM,I,BEAMSECDATA,6.535,6.535,8.06,.465,.465,.285SECTYPE,4,BEAM,HREC,PEAKSECDATA,6,6,.25,.25,.25,.25,0,0,0,0SAVEJanuary30,2001Inventory#001444W4-4.梁模型建筑框架4.指定“column”梁截面，剖分垂直
5、线网格。UtilityMenu>WorkPlane>ChangeActiveCSto>GlobalCartesianUtilityMenu>Select>Entities...按z坐标Min=0，Max=119，选择线。从全部中选择,按[Apply],按[Replot]MainMenu>Preprocessor>MeshTool…单元特性:设置为[Lines]，并按[Set]。拾取[PickAll]MAT=1,TYPE=1,SECT=1,PickOrientationkeypoints=Yes,按[OK]键入定
6、位关键点号102，按Enter键,然后按[OK]网格尺寸控制:Lines，按[Set][PickAll]在对话框中设定NDIV=4,然后按[OK]剖分网格:设置为[Lines]，然后按[Mesh][PickAll]UtilityMenu>PlotCtrls>Style>SizeandShape.../ESHAPE=ON[OK]January30,2001Inventory#001444W4-4.梁模型建筑框架4.(续)或使用命令:CSYS,0LSEL,S,LOC,Z,0,119LATT,1,,1,,102,,1
7、LESIZE,ALL,,,4LMESH,ALL/ESHAPE,1EPLOTJanuary30,2001Inventory#001444W4-4.梁模型建筑框架5.指定“girder”梁截面，剖分水平线网格。选择实体:按Y坐标Min,Max=480，选择线从全部中选择,按[Apply],按[Plot]设定Min,Max=240追加选择,按[Apply],按[Replot]Min,Max=0追加选择,按[Apply],按[Replot]设置Z坐标;Min,Max=0,119反选择,按[Apply],按[Replot
8、]网格工具:单元特性:[Lines]:按[Set][PickAll]设置MAT=1,TYPE=1,SECT=2,PickOrientationkeypoints=Yes,按[OK]键入定位关键点号101，按Enter键,然后按[OK]网格尺寸控制:Lines:按[Set][PickAll]在对话框中设定NDIV=6,然后按[OK]按[Mesh][PickAll]January30,20
