The force of picket side frictional resistance that is based on ABAQUS emulates an analysis

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Summary: ? Earth of picket of imitate of software of BAQUS of Man of take along sth to sb the osculatory problem in interaction, in using ABAQUS software advocate one from osculatory algorithm, the contact is built to introduce stretch model to picket body to; between picket side and earthy system, earthy system is used rub one coulomb model undertakes Er imitate, consider the impact of initiative crustal stress. Pass computation, got the distributinging case of force of picket side frictional resistance, calculating the imitate in the exemple the force of picket side frictional resistance that some tries picket project and picket top always sedimentation, with the spot the test agrees as a result. Keyword: ? ; of force of frictional resistance of side of picket of? of Yong of プ of  makings Ao sedimentations;ABAQUS0 foreword picket base the core problem of the design, it is nothing more than sedimentation and bear the weight of force two respects. Be in before in the design, it seems that force of picket side frictional resistance is a changeless value only, and often had estimated small. In fact, the value of force of picket side frictional resistance is carry load on the head as picket, and deepness wait for all sorts of elements and change, and deepness effect is relatively apparent. To attrition single stake, its bear the weight of force basically is assumed by force of picket side frictional resistance. So, of proper analysis and force of frictional resistance of computational picket side distributing reach influencing factor is crucial. Traditional method is the ruinous load test that does picket. However, the spot load test that does picket takes a lot of work already costly, especially to big diameter picket, should undertake this kind of experiment needs to bring to bear on very big experiment load, no matter be to load condition, still experiment the technology is very difficult. How to concern a material according to what indoor experiment gets, the method that uses emulation analysis will decide case of effect of strength of picket side frictional resistance, the vertical stroke that decides picket then to bear the weight of force, it is the problem that deserves wide attention. 1 build the Zhou Tu of nonlinear, picket that model of picket earth computation is considering ground between earth of statified, picket nonlinear end of mutual influence, picket has put end of broken bits, picket and picket side to note oar consolidate, picket to grow the diameter that reach stake when the element such as change, finite yuan the law is to show the method with the most applicable phase, because try picket difficulty and actual measurement charge,it can be solved big and the problem that cannot have in great quantities. 1.

1 finite in the osculatory imitate of yuan of model ABAQUS, want to build the surface on each component in the model, build a contact to be opposite, use advocate one from (Master-Slave) contact is algorithmic. Choice advocate, from exterior principle the reseau that is appurtenant surface differentiates more careful, be like reseau density close, should choose softer material surface to be appurtenant surface. Accordingly, appearance of choice land system is appurtenant surface here, if pursue 1 not. Graph 1 interface model is on geometrical model, come with large size imitate system of half infinite space, the radius of system of the land when computation is far the radius that is more than picket cross section (the 40^-60 that if earthy system radius is taken,is radius of picket cross section times) . Get carry on one's shoulder to the axial of stake of single big diameter train in excess specified length finite yuan of analysis, can simplify to have consideration for issue of axial symmetry plane. Unit of axial symmetry of 4 node bilinear is used in article. Calculate an error to decrease Xiaoji, also calculate to shorten at the same time time, what unit around picket earth interface reseau differentiates is fine, and in the earthy system that is far from interface, reseau differentiates relatively few and far between, if pursue,2 are shown. Use elastomer analysis to picket body, earthy system is used play plasticity body analysis. A variety of plasticity were offerred in ABAQUS this compose model cabinet, the project is used to go up in article commonly used rub one coulomb of Er model. ABAQUS software can consider coefficient of pressure of side direction earth, initiative crustal stress and lateral pressure coefficient are installed in · INITIALCONDITIONS, can be in ' balance of the implementation in GEOSTATIC pace. This is very effective to problem of imitate cliff earth. Graph enlarge of ministry of 2 networks structure pursues 1.

Ceng Di of To Ol An of model of 2 coulomb attrition goes out, in picket Zhou Weijun pledges earthy condition falls, no matter be general attrition picket,still embed cliff picket, when obstruction of computational picket side, picket carries force of frictional resistance of side managing stake to press average 2 times take a cost, this is mature the result to effect of aggrandizement of force of picket side frictional resistance plain. Use ABAQUS software, can the graph that deepness of edge of obstruction of side of picket of very easy imitate changes, and appearance and spot test curve are similar, if pursue,3 are shown. Graph obstruction of 3 picket side 2 calculate project of exemple Nantong some bridge to try picket to be picket of 6 bore perfusion in all, among them boreal bank 3. Be opposite in article boreal bank 1 " the force of picket side frictional resistance that tries picket undertakes numerical value is emulated. According to data of spot actual measurement, the radius of earthy system takes 30 M, coefficient of side direction pressure is taken 0.

5, material parameter sees a table 1 with the watch 2. 2.

Force of frictional resistance of 1 picket side and picket carry those who return power to partake to try picket this static the imitate cost that holds experiment and ABAQUS sees a table 3. Picket carries load on the head to answer to turn over force to be assumed respectively by force of picket side frictional resistance and picket end, but the stake that the force of picket side frictional resistance of this picket assumed the majority carries load on the head, in picket only top load reachs fair value when, the stake that just has little share carries the generation that return power. When load achieves 8o0kN, force of picket side frictional resistance still occupies the 9% above that carry load on the head to picket, continue to load arrives 10000kN, picket end returns power very small still. Force of frictional resistance of to load later period fills minute of play, addition load one fraction is assumed by picket end, this shows the trait of typical attrition picket. So to attrition picket, the attrition power that increases picket earth interface as far as possible is crucial. 2.

2 sedimentation computation delivers formula according to load of bore perfusion picket, does body of each paragraphs of picket compress a quantity to you can press type is calculated: ? The actual measurement value that  ? always sedimentations, imitate value and the calculation that use type to reach are worth, if pursue,4 are shown. Graph 4 photographs look to formulary calculative result, the imitate watch of ABAQUS is added approach actual measurement to be worth. 3 epilogue used AB AQUS software to build the joint action model that picket earth contacts, the force of picket side frictional resistance that analysed attrition picket distributings circumstance, right consider an exemple medium 1 " force of frictional resistance trying picket and sedimentation undertook emulation an analysis, computational result and real phase be identical, the specification produces BAQUS to be opposite picket earth the height of interaction is nonlinear the problem is having very good processing capacity. CNC Milling