abaqus有限元分析簡(jiǎn)支梁

1、1.梁C的主要參數(shù)：其中：梁長(zhǎng)3000mm，高為406mm，上下部保護(hù)層厚度為38mm，縱筋端部保護(hù)層厚度為25mm抗壓強(qiáng)度：35.1MPa抗拉強(qiáng)度：2.721MPa受拉鋼筋為2Y16，受壓鋼筋為2Y9.5，屈服強(qiáng)度均為440MPa箍筋：Y7102，屈服強(qiáng)度為596MPa2.混凝土及鋼筋的本構(gòu)關(guān)系1、運(yùn)用陳光明老師的論文（Chen et al. 2011）來確定混凝土的本構(gòu)關(guān)系：受壓強(qiáng)度：其中=28020，2、受壓強(qiáng)度與開裂位移的相互關(guān)系：其中3、損傷因子：其中 e=10（選取網(wǎng)格為10mm）4、鋼筋取理想彈塑性5、名義應(yīng)力應(yīng)變和真實(shí)應(yīng)力及對(duì)數(shù)應(yīng)變的轉(zhuǎn)換：6、混凝土最終輸入的本構(gòu)關(guān)系如下：co

2、mpressive behaviortensile behaviortension damageyield stressinelastic strainyield stressdisplacementparameterdisplacement21.5027403602.72100025.563592812.72247E-052.6835568820.00031290.187664920.000312928.884773368.85105E-052.6466283190.00062580.319026090.000625831.435018840.0001772782.6102105080.00

3、093870.416069330.000938733.249515370.0002922712.5742995620.00125160.490652370.001251634.407876730.0004306482.5388915150.00156450.549734630.001564535.012031810.0005887722.5039823270.00187740.59766980.001877435.168721060.0007628332.469567890.00219030.637320970.002190334.978055480.0009492592.4356440290

4、.00250320.670648270.002503234.527492040.0011449282.4022065120.00281610.699038850.002816133.889736490.0013472452.3692510480.0031290.723501940.00312933.173508980.0015411852.3367732940.00344190.744789410.003441932.381735080.0017377922.304768860.00375480.763472840.003754831.5436769330.681617990.00193602

5、30.0021350822.273233312.2421621670.00406770.00438060.779994510.794702050.00406770.004380629.812239710.0023343742.2115509160.00469350.80787240.004693528.947808230.0025334612.1813950110.00500640.819728980.005006428.097158680.0027320282.1516898710.00531930.830453970.005319327.266490410.0029298542.12243

6、0890.00563220.840197450.005632226.459997920.0031267882.0936134360.00594510.849084130.005945125.680364580.0033227362.0652328570.0062580.857218520.00625824.92914530.0035176411.8115297940.009294840.910442310.0092948424.207060880.0037114781.5942285570.012331680.938747480.0123316823.514222920.0039042441.

7、4090741380.015368520.955771450.0153685222.850304860.0040959491.2519898770.018405360.966807250.0184053622.214671440.0042866161.1191646860.02144220.974332780.021442221.606476160.0044762761.0071042620.024479040.979657640.0244790421.024734250.0046649630.9126557650.027515880.983535050.0275158819.46615199

8、0.0052111360.833013350.030552720.986425830.0305527218.096495730.0057503250.765710270.033589560.988625330.0335895616.889240560.0062834790.708601940.03662640.990329810.036626415.820798970.0068114380.6598432810.039663240.991673390.0396632414.870922570.0073349260.6178628260.042700080.99274980.0427000814

9、.02251450.0078545530.5813354270.045736920.993625740.0457369213.261240680.0083708310.5491548630.048773760.99434940.0487737612.575106340.0088841880.5204072880.05181060.9949560.051810611.954064090.0093949840.4943461110.054847440.995471540.0548474411.389674850.0099035180.4703687070.057884280.995915420.0

10、578842810.87482430.0104100470.4479951660.060921120.99630220.0609211210.403489570.0109147840.4268491510.063957960.996642880.063957969.9705488860.0114179130.4066408760.06699480.996945860.06699489.5716268130.011919590.3871521190.070031640.997217570.070031649.2029683920.012419950.3682231540.073068480.99

11、7462980.073068488.8613366970.0129191080.3497414790.076105320.997685950.076105328.5439291790.0134171640.3316321530.079142160.997889540.079142168.2483091390.0139142060.3138496230.0821790.998076150.0821797.9723493610.014410310.2963708440.085215840.998247730.085215847.7141855790.0149055420.2791895620.08

12、8252680.998405860.088252687.4721778770.0153999620.2623116130.091289520.998551850.091289527.2448785520.0158936210.2457510870.094326360.998686780.094326367.031005230.0163865650.2295272570.09736320.998811580.09736326.8294182890.0168788350.213662150.100400040.998927060.100400046.6391018290.0173704680.19

13、8178660.103436880.999033930.103436886.4591475480.0178614960.1830991140.106473720.999132810.106473726.288741050.0183519480.1684442240.109510560.999224270.109510566.1271501560.0188418510.1542323470.11254740.999308830.11254745.9737149020.0193312290.1404789960.115584240.999386950.115584245.8278389465.68

14、89821540.0198201040.0203084930.1271965570.114394170.118621080.121657920.999459090.999525640.118621080.121657925.5566541950.0207964170.1020777240.124694760.9995870.124694765.4304089830.0212838890.090249960.12773160.999643520.12773165.3098398350.0217709270.0789106320.130768440.999695530.130768445.1945

15、752520.0222575410.0680567270.133805280.999743350.133805280.0576827050.136842120.999787290.136842120.0477807710.139878960.999827630.139878960.0383411460.14291580.999864610.14291580.029352340.145952640.999898510.145952643.建模過程1、 Part 梁和墊塊選擇shell，鋼筋選擇wire2、 Property混凝土：density以及Elastic的數(shù)值參考老師的論文Concret

16、e damaged plasticity：數(shù)值為前面的本構(gòu)關(guān)系值。粘性參數(shù)取0.0005截面的定義： 梁及墊塊類型選擇均質(zhì)實(shí)體，鋼筋類型選擇桁架箍筋被賦予截面屬性：3、 Assembly4、 Step建立名為Step-1的分析步5、 Interaction 約束有幾種情況a. 對(duì)墊塊與梁的相互作用，選擇tieb. 參考點(diǎn)的相互作用，選擇couplingc. 對(duì)鋼筋整體與梁的相互作用，選擇embedded region約束后的效果圖：6、 Load各分析步設(shè)置過程：加載方式采用位移加載，對(duì)模型進(jìn)行過 “-12”“-10”“-7”“-5”的加載對(duì)于下墊塊的約束為約束墊塊中點(diǎn)的Y軸（選擇U2），梁右

17、邊約束X軸（選擇U1）。約束后的梁示意圖：8、Mesh 先對(duì)梁結(jié)構(gòu)形式進(jìn)行轉(zhuǎn)變：進(jìn)行布種：劃分網(wǎng)格后效果圖：對(duì)鋼筋骨架形式進(jìn)行修改：9、Job提交工作過程：4.結(jié)果輸出位移加載值為-10mm，單元為10mm時(shí)的結(jié)果：不使用混凝土“粘性參數(shù)”時(shí)生成的裂縫：使用混凝土粘性參數(shù)=0.0005時(shí)生成的裂縫:荷載-位移圖:受拉區(qū)混凝土應(yīng)力-應(yīng)變圖:受壓區(qū)混凝土應(yīng)力-應(yīng)變圖:箍筋應(yīng)力-應(yīng)變圖：受拉鋼筋應(yīng)力-應(yīng)變圖：受壓鋼筋應(yīng)力-應(yīng)變圖：5.心得體會(huì)：經(jīng)過兩個(gè)月的學(xué)習(xí)，對(duì)于abaqus有了初步的認(rèn)識(shí)，熟悉了大概的操作。從剛開始按照參考書上的三維案例自己建模，熟悉操作過程，到自己摸索二維建模，和同學(xué)討論中間遇到的各種問題，讓我對(duì)abaqus有了更深入的認(rèn)識(shí)，了解到了abaqus計(jì)算能力的強(qiáng)大，也為以后繼續(xù)學(xué)習(xí)abaqus打下了基礎(chǔ)。在這里談?wù)勛约旱囊恍┬牡皿w會(huì)，通過以上的學(xué)習(xí)和老師上課的講解，讓我了解到力學(xué)基礎(chǔ)知識(shí)的重要性，尤其是老師的講解，對(duì)力學(xué)基本問題的分析，使我認(rèn)識(shí)到自己本科學(xué)習(xí)的知識(shí)是很淺顯的，這里還有非常多我不了解的知識(shí)，未來可以慢慢學(xué)習(xí)研究。對(duì)于abaqus的本構(gòu)關(guān)系中，輸入的各種應(yīng)力應(yīng)變值、損傷因子等，也是以