本文選題：拉索 + 絞捻特性　； 參考：《天津大學(xué)學(xué)報(自然科學(xué)與工程技術(shù)版)》2017年S1期

【摘要】：針對索撐節(jié)點處產(chǎn)生局部彎曲的連續(xù)索,采用ABAQUS建立了鋼拉索拉-彎耦合效應(yīng)下的精細(xì)化有限元模型,同時進(jìn)行了高釩索拉-彎耦合效應(yīng)下受力性能的試驗研究,得到高釩索拉-彎耦合效應(yīng)下的破壞模式、破斷力、極限應(yīng)變,并與拉索單純受拉伸狀態(tài)下受力性能數(shù)值模擬結(jié)果進(jìn)行對比,驗證了鋼拉索拉-彎耦合效應(yīng)精細(xì)化有限元模型的正確性.分析表明:拉索在索夾端部的彎曲導(dǎo)致局部鋼絲擠壓接觸面積增大,影響整股鋼絲傳力,造成局部受力增大而率先發(fā)生破斷;拉-彎耦合效應(yīng)對拉索的受力不利,極限應(yīng)變降低,將顯著降低拉索的塑性變形能力,使結(jié)構(gòu)發(fā)生脆性破壞,應(yīng)優(yōu)化索撐節(jié)點設(shè)計并注意施工過程安全.
[Abstract]:Aiming at the continuous cables with local bending at the cable-braced joints, Abaqus is used to establish the fine finite element model under the coupling effect of steel cable tension and bending, and the experimental study on the mechanical behavior of the cable tension bending coupling effect with high vanadium content is carried out at the same time. The failure mode, breaking force, ultimate strain under the coupling effect of cable tension and bending with high vanadium are obtained, and the results are compared with the numerical simulation results of the tensile behavior of the cable under simple tensile condition. The precision finite element model of steel cable tension-bending coupling effect is verified. The analysis shows that the bending of the cable at the end of the cable leads to the increase of the contact area of the local steel wire extrusion, which affects the transmission of force of the whole steel wire, and results in the increase of the local force and leads to the first breakage, and the coupling effect of tension and bending is unfavorable to the force of the cable. If the limit strain is reduced, the plastic deformation ability of the cable will be significantly reduced, and the structure will be brittle. Therefore, the design of the cable-braced joints should be optimized and the safety of the construction process should be paid attention to.
【作者單位】： 北京工業(yè)大學(xué)建筑工程學(xué)院;
【基金】：國家自然科學(xué)青年基金資助項目(51408016) 北京市博士后科學(xué)基金資助項目(2015ZZ-30)
【分類號】：TU394

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