钢拉索拉-弯耦合效应受力性能研究

发布时间：2018-07-05 12:04

本文选题：拉索 + 绞捻特性　；参考：《天津大学学报(自然科学与工程技术版)》2017年S1期

【摘要】：针对索撑节点处产生局部弯曲的连续索,采用ABAQUS建立了钢拉索拉-弯耦合效应下的精细化有限元模型,同时进行了高钒索拉-弯耦合效应下受力性能的试验研究,得到高钒索拉-弯耦合效应下的破坏模式、破断力、极限应变,并与拉索单纯受拉伸状态下受力性能数值模拟结果进行对比,验证了钢拉索拉-弯耦合效应精细化有限元模型的正确性.分析表明:拉索在索夹端部的弯曲导致局部钢丝挤压接触面积增大,影响整股钢丝传力,造成局部受力增大而率先发生破断;拉-弯耦合效应对拉索的受力不利,极限应变降低,将显著降低拉索的塑性变形能力,使结构发生脆性破坏,应优化索撑节点设计并注意施工过程安全.
[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.
【作者单位】：北京工业大学建筑工程学院;
【基金】：国家自然科学青年基金资助项目(51408016) 北京市博士后科学基金资助项目(2015ZZ-30)
【分类号】：TU394

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