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Q460高强钢螺栓接头受力性能分析与评价
Analysis and Evaluation on Mechanical Performance of Q460 High-Strength Steel Bolt Joints
投稿时间: 2017-08-13  最后修改时间: 2018-01-10
DOI:
中文关键词:  关键词:高强度钢材  高强螺栓  应力分布  承压型  接触刚度
英文关键词:Keywords : high-strength steel  high-strength bolts  stress distribution  bearing type  contact stiffness.
基金项目:国家自然科学基金项目(51308454),国家重点实验室科学研究计划项目(2017ZZKT-8),西安理工大学科技新星项目
作者单位E-mail
肖枫 西安理工大学 584637242@qq.com 
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中文摘要:
      摘要:在试验研究的基础上,对Q460高强钢螺栓横排和纵排下连接接头的应力分布、破坏模式、螺栓受力及承载性能进行了有限元模拟,并与EC3规范关于孔壁承压、螺栓抗剪、净截面破坏及板件撕裂的理论计算值进行了对比。研究结果表明:有限元分析的荷载位移曲线规律及连接接头的极限承载力与试验结果基本吻合。当螺栓横向布置时,两孔受力较均匀,应力云图及塑性区域呈对称分布,拟合曲线点分布较离散,采用EC3规范理论计算值富裕度较大;当螺栓纵向布置时,两孔受力不均,端部螺栓孔变形较大,EC3规范计算端部螺栓和中部螺栓承载力均比较准确。研究为高强钢螺栓连接设计方法提供数据参考。
英文摘要:
      Abstract : Based on the experimental research, this paper analyzes the stress distribution, failure modes, bolt tension force and the bearing capability of Q460 high-strength steel bolts under horizontal and longitudinal joints in finite element simulation, and compares the results with the theoretical calculating value of EC3 specification on the bearing stresses along the bolt holes, shear bearing capacity, net section stress failure and plate tearing. By study, the load-displacement curve and the ultimate bearing capacity of joints of the finite element analysis are in good agreement with the experimental results. When the bolt is laterally arranged, the two holes are more evenly stressed; the stress nephogram and the plastic range are distributed symmetrically; the distribution of the curve points is more discrete and the margin of applying EC3 standard theory is relatively large; while longitudinally arranged, the two holes are unevenly stressed with the end of the bolt holes being deformed greatly, and meanwhile the bearing capacity of the end bolt and the center bolt is more accurate under the calculation of EC3 specification. In a word, this study provides data reference for the design method of high-strength steel bolt connection.
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