abaqus有限元分析简支梁 - 图文

1.梁C的主要参数：

其中：梁长3000mm，高为406mm，上下部保护层厚度为38mm，纵筋端部保护层厚度为25mm 抗压强度：35.1MPa 抗拉强度：2.721MPa

受拉钢筋为2Y16，受压钢筋为2Y9.5，屈服强度均为440MPa 箍筋：Y7@102，屈服强度为596MPa

2.混凝土及钢筋的本构关系

1、运用陈光明老师的论文（Chen et al. 2011）来确定混凝土的本构关系： 受压强度：

其中a?EC=28020，???fc?，???0.002 2、受压强度与开裂位移的相互关系：

其中c1?3.0,c2?6.93 3、损伤因子：

其中hc?e2 e=10（选取网格为10mm） 4、钢筋取理想弹塑性

5、名义应力应变和真实应力及对数应变的转换：

?true??nom(1??nom)?Plln?ln(1??nom)??true E6、混凝土最终输入的本构关系如下：

compressive behavior

tensile behavior

tension damage

yield stress inelastic strain yield stress displacement parameter displacement

21.50274036

25.56359281 28.88477336 31.43501884 33.24951537 34.40787673 35.01203181 35.16872106 34.97805548 34.52749204 33.88973649 33.17350898 32.38173508 31.54367693 30.68161799 0

2.72247E-05 8.85105E-05 0.000177278 0.000292271 0.000430648 0.000588772 0.000762833 0.000949259 0.001144928 0.001347245 0.001541185 0.001737792 0.001936023 0.002135082 2.721

2.683556882 2.646628319 2.610210508 2.574299562 2.538891515 2.503982327 2.46956789 2.435644029 2.402206512 2.369251048 2.336773294 2.30476886 2.27323331 2.242162167 0

0.0003129 0.0006258 0.0009387 0.0012516 0.0015645 0.0018774 0.0021903 0.0025032 0.0028161 0.003129 0.0034419 0.0037548 0.0040677 0.0043806 0

0.18766492 0.31902609 0.41606933 0.49065237 0.54973463 0.5976698 0.63732097 0.67064827 0.69903885 0.72350194 0.74478941 0.76347284 0.77999451 0.79470205 0

0.0003129 0.0006258 0.0009387 0.0012516 0.0015645 0.0018774 0.0021903 0.0025032 0.0028161 0.003129 0.0034419 0.0037548 0.0040677 0.0043806

29.81223971 28.94780823 28.09715868 27.26649041 26.45999792 25.68036458 24.9291453 24.20706088 23.51422292 0.002334374 0.002533461 0.002732028 0.002929854 0.003126788 0.003322736 0.003517641 0.003711478 0.003904244 2.211550916 2.181395011 2.151689871 2.12243089 2.093613436 2.065232857 1.811529794 1.594228557 1.409074138 0.0046935 0.0050064 0.0053193 0.0056322 0.0059451 0.006258 0.00929484 0.01233168 0.01536852 0.8078724 0.81972898 0.83045397 0.84019745 0.84908413 0.85721852 0.91044231 0.93874748 0.95577145 0.0046935 0.0050064 0.0053193 0.0056322 0.0059451 0.006258 0.00929484 0.01233168 0.01536852 22.85030486 22.21467144 21.60647616 21.02473425 19.46615199 18.09649573 16.88924056 15.82079897 14.87092257 14.0225145 13.26124068 12.57510634 11.95406409 11.38967485 10.8748243 10.40348957 9.970548886 9.571626813 9.202968392 8.861336697 8.543929179 8.248309139 7.972349361 7.714185579 7.472177877 7.244878552 7.03100523 6.829418289 6.639101829 6.459147548 6.28874105 6.127150156 5.973714902 5.827838946 5.688982154 0.004095949 0.004286616 0.004476276 0.004664963 0.005211136 0.005750325 0.006283479 0.006811438 0.007334926 0.007854553 0.008370831 0.008884188 0.009394984 0.009903518 0.010410047 0.010914784 0.011417913 0.01191959 0.01241995 0.012919108 0.013417164 0.013914206 0.01441031 0.014905542 0.015399962 0.015893621 0.016386565 0.016878835 0.017370468 0.017861496 0.018351948 0.018841851 0.019331229 0.019820104 0.020308493 1.251989877 1.119164686 1.007104262 0.912655765 0.83301335 0.76571027 0.70860194 0.659843281 0.617862826 0.581335427 0.549154863 0.520407288 0.494346111 0.470368707 0.447995166 0.426849151 0.406640876 0.387152119 0.368223154 0.349741479 0.331632153 0.313849623 0.296370844 0.279189562 0.262311613 0.245751087 0.229527257 0.21366215 0.19817866 0.183099114 0.168444224 0.154232347 0.140478996 0.127196557 0.11439417 0.01840536 0.0214422 0.02447904 0.02751588 0.03055272 0.03358956 0.0366264 0.03966324 0.04270008 0.04573692 0.04877376 0.0518106 0.05484744 0.05788428 0.06092112 0.06395796 0.0669948 0.07003164 0.07306848 0.07610532 0.07914216 0.082179 0.08521584 0.08825268 0.09128952 0.09432636 0.0973632 0.10040004 0.10343688 0.10647372 0.10951056 0.1125474 0.11558424 0.11862108 0.12165792 0.96680725 0.97433278 0.97965764 0.98353505 0.98642583 0.98862533 0.99032981 0.99167339 0.9927498 0.99362574 0.9943494 0.994956 0.99547154 0.99591542 0.9963022 0.99664288 0.99694586 0.99721757 0.99746298 0.99768595 0.99788954 0.99807615 0.99824773 0.99840586 0.99855185 0.99868678 0.99881158 0.99892706 0.99903393 0.99913281 0.99922427 0.99930883 0.99938695 0.99945909 0.99952564 0.01840536 0.0214422 0.02447904 0.02751588 0.03055272 0.03358956 0.0366264 0.03966324 0.04270008 0.04573692 0.04877376 0.0518106 0.05484744 0.05788428 0.06092112 0.06395796 0.0669948 0.07003164 0.07306848 0.07610532 0.07914216 0.082179 0.08521584 0.08825268 0.09128952 0.09432636 0.0973632 0.10040004 0.10343688 0.10647372 0.10951056 0.1125474 0.11558424 0.11862108 0.12165792

5.556654195 5.430408983 5.309839835 5.194575252

0.020796417 0.021283889 0.021770927 0.022257541 0.102077724 0.09024996 0.078910632 0.068056727 0.057682705 0.047780771 0.038341146 0.02935234 0.12469476 0.1277316 0.13076844 0.13380528 0.13684212 0.13987896 0.1429158 0.14595264 0.999587 0.99964352 0.99969553 0.99974335 0.99978729 0.99982763 0.99986461 0.99989851 0.12469476 0.1277316 0.13076844 0.13380528 0.13684212 0.13987896 0.1429158 0.14595264

3.建模过程

1、Part

梁和垫块选择shell，钢筋选择wire 2、Property

混凝土：density以及Elastic的数值参考老师的论文

Concrete damaged plasticity：数值为前面的本构关系值。