摘要
研究巨型钢框架--拉索支撑结构中预应力拉索的抗侧机理,为确定拉索参数提供理论依据.基于预应力的作用形态及力学原理分析得到预应力拉索的抗侧机理,推导了预应力拉索抗侧刚度理论公式.从模型试验的角度进一步研究,将模型试验的结果与理论推导及数值分析的结果进行对比分析,最终验证了预应力拉索的抗侧机理:预应力为柔性拉索建立轴向刚度和稳定性,使预紧过的拉索既可承受拉力,也可承受压力,从而为结构提供弹性约束支撑.
This paper studies the lateral supporting mechanism of the prestressed cable for a mega steel frame-cable bracing structure to provide a theoretical basis for determining cable＇s parameters. Based on the mechanism and by analyzing the prestress, a theoretical equations for cable＇s lateral stiffness is derived. After the model test and a comparison with the theoretical result and the numerical value, the lateral supporting mechanism of the prestressed cable is finally verified. With the prestressing force offering the axial stiffness and the stability for the cable, the prestressed cable can sustain tension and pressure and provide an elastic restraint support for the mega steel frame-cable bracing structure.
出处
《力学与实践》
北大核心
2014年第2期180-184,共5页
Mechanics in Engineering
基金
国家自然科学基金(50948035)
住建部科技计划(2012-K2-28)
江苏省自然科学基金(BK2009723)资助项目
关键词
巨型钢框架
预应力拉索
模型试验
抗侧机理
mega steel frame, prestressed cable, model test, lateral resistant mechanism
