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In consideration of the randomness of elastic restraint stiffeness and both cable stiffeness and cable pretension, the general formulas for analyzing random internal forces of the prestressed steel truss by perturbation methed are obtained. 考虑到弹性约束刚度、拉索刚度和预拉力的随机性，进一步得到了随机参数预应力钢架随机内力摄动分析的一般公式。
Optimization design of prestressed steel trusses not only includes the optimization of sectional dimension of the bar but also the optimization of the different schemes of steel cables and the different pretensions of steel cables. 预应力钢桁架优化设计不仅包括钢桁架杆件截面优化 ,还包括布索方案和预拉力值的优化。
Random internal force analysis of prestressed steel truss with random cable stiffness on perturbation method 具有随机拉索刚度的预应力钢桁架随机内力摄动分析
prestressed steel truss 预应力钢桁架
OPTIMAL DESIGN AND COST-CURVE STUDY FOR LARGE-SPAN PRESTRESSED STEEL TRUSSES 大跨预应力钢桁架优化设计和最优造价曲线研究
Prestressed steel strand extension machine? 预应力钢绞线拉伸设备?
Iterative perturbation methods for inversive analysis of stiffeness of prestressed steel trusses 予应力钢桁架刚度反演分析的摄动迭代法
The results of the research indicate that the assembled highway bridge steel truss is an effective means to resolve the common problems of falsework over river for construction of cast-in-situ prestressed concrete continuous girders. 研究表明，采用装配式公路钢桥桁架解决跨河预应力混凝土连续梁现浇混凝土施工支架问题是有效的。
RELIABILITY ANALYSIS OF PLANAR PRESTRESSED STEEL TRUSSES BASED UPON REFLECTION TRANSFORMATION METHOD 基于映射变换法的平面预应力钢桁架整体可靠性分析
internal prestressed steel roof truss 体内预应力钢屋架
Investigation on Lateral Dynamics Behaviour of Half-Across Steel Truss Bridge and Its Reinforcing Measures? 半穿式桁梁桥横向动力性能及其改善措施的研究?
Incomplete penetration is the main defect in the welding root of the tubular joint in steel truss framework. 钢桁架结构管节点焊缝根部存在的主要缺陷为未焊透,它的存在对焊缝的质量有很大的影响。
The conclusions obtained through numerical simulation have valuable reference to aseismic design of steel truss bridge. 通过数值模拟得出了几点结论，对于钢桁架桥梁的抗震设计有一定的参考价值。
The prestressed steel bars shall be threaded in loop by loop with manual work during the slipform elevation process. 预应力筋应随滑模提升过程逐圈用人工穿入。
In this paper,the structural shape,feature and welding technique of integral node of steel truss girder are discussed. 介绍了钢桁梁整体节点构造的结构形式、特点及焊接技术要求；
The steel truss girder block units were first assembled at the outermost parts of the pier-side brackets. 钢桁式腹板组合截面能有效地减少结构自重,在大跨径梁桥应用其优点显著。
To expound the approach to get low relaxation property of prestress steel products and its effect factors, and the mechanism is discussed. 阐述了获取低松弛预应力钢材的途径及其影响因素,研究与探讨了预应力钢材低松弛性能的获取机理。
In the evaluation of highway steel truss bridges based on the method of fracture mechanics, the plane fracture toughness K IC must be detected firstly. 应用断裂力学方法对公路钢桁桥的安全性能进行评估中,必须首先测出平面应变断裂韧度K IC。
The steel truss was hinged to brackets on frame columns. Moment from the bracket was balanced by a concrete wall between the two columns behind. 钢桁架与框架柱上安装的牛腿铰接连接,通过牛腿背面框架柱间的混凝土墙平衡牛腿传来的弯矩。
The material properties of prestressed steel strand post high temperatures are studied by experiments and various cooling patterns are considered in the experiments. 试验研究预应力钢绞线在经历高温作用并冷却至室温后的力学性能。