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1)  superlong prestressed structure
超长预应力结构
2)  ultra-long prestressed concrete structure
超长预应力混凝土结构
1.
Analysis of temperature variation and shrinkage effects on ultra-long prestressed concrete structure
超长预应力混凝土结构温差收缩效应分析
3)  super-long and continuous prestressed concrete structures
超长预应力混凝土连续结构
1.
Based on the experience of design and construction for super-long and continuous prestressed concrete structures,some splicing methods of prestressed strand tendons,which are sectionalized in laying and tensioning,are compared and analyzed,and then the relative design suggestions proposed.
结合超长预应力混凝土连续结构的设计与施工经验,本文对此类结构中常用的几种钢绞线预应力筋连接构造进行了介绍、比较与分析,在此基础上提出了相应设计建议。
4)  prestressed hyperstatic strucure
预应力超静定结构
1.
This paper introduces the moment modification suggestions in several countries to prestressed hyperstatic strucure.
介绍了国内外混凝土设计规范和各研究机构对预应力超静定结构考虑塑性内力重分布的弯矩调幅设计建议;总结出影响预应力混凝土超静定结构弯矩调幅设计建议的主要因素是截面相对受压区高度和次弯矩;深入讨论了各调幅建议在处理受压区高度和次弯矩上的分歧;提出应对预应力超静定结构的弯矩调幅设计建议。
5)  prestressed structures
预应力结构
1.
A variety of factors,such as cable loosen,would make prestressed structures work in error state,which will influence the function of structures.
预应力结构在使用过程中由于索松弛等原因导致结构处于误差状态,影响结构的正常使用。
2.
The phylogeny and the tendency of the prestressed structures are analysed in this paper, and the function and status of prestressed cables are also immulated, the classification performance and state-of arts of prestressed cables are summarized and the importance of the research for linear expansion factor of the cables is proposed in this paper.
分析了预应力结构的发展历史和趋势,阐明了预应力索在现代预应力结构体系中的作用和地位,总结了预应力索的分类、性能及国内外对索的研究现状,提出了索的线性膨胀系数研究的重要性,并对利用拉索对结构施加预应力的主要方法(拉索法和支座位移法)进行了总结分析。
3.
In this paper ths cables in prestressed structures are treated as two-node elements.
本文将预应力结构中的张拉索处理为具有两个铰接节点的索单元,导出了索单元中总分布荷载的表达式和索的大位移增量刚度矩阵以及索元的一致质量矩阵,基于虚功原理建立了索元的静动力非线性平衡方程。
6)  pre-stressed structure
预应力结构
1.
Based on the bond and failure mechanism of the pre-stressed structure and the material parameter depression in the temperature field under fire,this paper analyzed the mechanical behavior of the pre-stressed hollow slab by the non-linear finite element method,and obtained the pre-stressed steel strand stress relaxation under the high temperature.
依据预应力结构的粘结与破坏机理,在火灾温度场下,考虑高温区域内板梁材料参数的降低,采用非线性有限元的方法分析板梁的受力性能,得出高温下预应力钢绞线的应力松弛程度,并在合理假定条件下研究钢绞线随局部失效长度的变化,以及整根钢绞线发生粘结滑移情况,为桥梁的检测评定以及维修加固提供理论依据。
补充资料:预应力
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性质:试验中试样所受到的预加的恒定静态应力,单位为Pa。在生热性疲劳试验中,如固特里奇屈挠试验中,一般都施加一恒定预应力,使试样产生一静态变形,再叠加一周期压缩变形进行试验,通常预应力的大小会影响试样的疲劳寿命,预应力越大,则试样寿命会越明显缩短。也有的先施加一静态压缩变形,再叠加周期性剪切变形进行试验。

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