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1、1.命令流：!预应力简支梁弹性分析---实体切分法FINISH/CLEAR/PREP7!0.定义变量EMST=1.95E5AS=139TF=180E3!力筋弹性模量、面积、张拉力、力筋质量密度DENSS=7921E-12EMCOM=3.45E4DENSC=2300E-12!混凝土弹性模量和质量密度R0=9000B=150H=200!曲线半径、梁宽、梁高、力筋关键点位置D0=40DD=200-2*D0SPANL=3000!力筋最高最低点距离、跨度D1=(39-3*SQRT(29))/35*DD-D0!切线交点到梁底的距离（考虑与半径、跨度关系）!1.定义单
2、元与材料属性ET,1,SOLID95ET,2,LINK8MP,EX,1,EMCOMMP,PRXY,1,0.2MP,DENS,1,DENSCMP,EX,2,EMSTMP,PRXY,2,0.3MP,DENS,2,DENSSR,1R,2,AS,TF/(EMST*AS)*1.0271!2.切分体形成力筋线BLC4,,,B,H,SPANLLSEL,NONEK,9,-10,H-D0K,10,-10,-D1,SPANL/2k,11,-10,H-D0,SPANLL,9,10L,10,11LFILLT,13,14,R0LCOMB,ALLK,14,B+10,H-D0L,9,
3、14ADRAG,13,,,,,,14LSEL,ALLVSBA,1,7WPCS,-1WPOFF,B/2WPROTA,,,90VSBW,ALLWPCS,-1WPOFF,,,SPANL/2VSBW,ALLWPCS,-1!3.划分网格LSEL,S,LOC,X,B/2LSEL,U,LOC,Z,0LSEL,U,LOC,Z,SPANL/2LSEL,U,LOC,Z,SPANLLSEL,U,LOC,Y,0LSEL,U,LOC,Y,HLATT,2,2,2LESIZE,ALL,40LMESH,ALLESIZE,40VATT,1,1,1MSHAPE,0MSHKEY,1VMESH
4、,ALLALLSEL,ALL!约束、加载、求解LSEL,S,LOC,Y,0LSEL,R,LOC,Z,0DL,ALL,,UYLSEL,S,LOC,Y,0LSEL,R,LOC,Z,3000DL,ALL,,UYDK,KP(0,0,0),UX,,,,UZDK,KP(0,0,3000),UXALLSEL,ALL/SOLUACEL,,9800SOLVEFINISH!查看结果/POST1PLDISP,1ETABLE,SIGS,LS,1PLLS,SIGS,SIGS,1ETABLE,SIGS,U,YPLLS,SIGS,SIGS,1PATH,KZHX,2PPATH,1,,0
5、,0,SPANL/2PPATH,2,,B,0,SPANL/2PDEF,SIGC,S,ZPLPATH,SIGCPATH,KZSX,2PPATH,1,,B/2,0,SPANL/2PPATH,2,,B/2,H,SPANL/2PDEF,SIGC,S,ZPLPATH,SIGC2.计算模型及结果图1预应力混凝土梁有限元计算模型图2预应力钢筋的有限元计算模型图3变形图图4梁在Y轴方向的位移图图5梁顶横向应力分布图6梁高方向上的应力分布
