桁架结构

The rectangular tube plan truss has been used in the roof structure of more and more long-span builds , because the form is novelty and the outline is mellifluence.

矩形管平面桁架由于形式新颖，线条流畅，已越来越多地应用于各类跨度较大场馆的屋盖结构中。

The topologies of a classical Michell truss and three kinds of arch bridges are optimized as numerical examples.

最后，以1个经典Michell桁架和3种形式的拱桥为数值算例，演示了其结构拓扑优化过程。

Pipe truss by purlin, even between a beam and the whole structure by supporting system.

管桁架之间通过檩条、连系梁和支撑系统把整个结构连成整体。

During the roof design, combined with the functional demand,the novel hyperboloidal roof with prestressed cabled truss system was adopted.

屋面设计中，结合建筑功能要求，采用了新颖的预应力索桁架双曲屋面结构体系。

Based on the load transmission mechanism of space truss, and referenced theanalysis of test materials, a formula for calculating the bearing capacity of reinforcedconcrete compression strut is introduced. By using the theory of plastic hinge-line, anupper limit solution of bent bearing capacity for four-pile cap, which coincidesprecisely with the practical measurements, is obtained. By utilizing the reaction ofthe soil under cap and by basing on the method of plastic ultimate analysis, an upperlimit solution of punching shear bearing capacity for pile cap is acquired, which. coincides precisely with the practical measurements, and the formula is similar to thecode.A brief discuss on cooperative work of strip beam of foundation and single rankof piles is made. Separately considering the pile-cap and the pile-group, thencoupling their matrix of rigidity, the inner force of pile-cap is solved by the numericalmethod under some reasonable supposition. In comparison with other method, thecalculating results are exact, reliable and convenient in using. The method provides apowerful tQol fOr further analysis and research on this kind of structure.

本文以空间桁架传力机理为基础，结合试验资料分析，推导了钢筋混凝土等边三桩承台受冲切承载力计算公式；根据塑性铰线理论，导得了与试验结果吻合良好的四桩承台受弯承载力的上限解；利用承台底土反力分布，根据塑性极限分析方法，导得了桩基承台受冲切承载力的上限解，在此基础上，通过简化假定，得到与规范公式相类似的承台受冲切承载力实用公式，该公式能方便考虑台底土反力作用，与试验结果的吻合程度比规范公式好；简要讨论了桩基条形承台梁与单排桩的协同工作分析；在一些合理假定的基础上，将承台与群桩分开考虑，分别得到其刚度矩阵后进行耦合，通过数值方法求解承台内力，算例表明，该方法结果准确，使用方便，为该类结构的进一步分析研究及工程设计提供了强有力的工具。

Base on the model analysis method of ANSYS finite element calculation software, the effect caused by deferent parameters on the free vibration properties of the prestressed space composite trass were dicussed.

本课题研究的预应力空间组合桁架，具有受力合理、质量轻巧、省材经济等优点，是值得作进一步深入研究和推广应用的结构体系。

The conclusion of this paper can be used in the research of structural characteristic and majorized design of prestressed concrete chord-stayed truss bridge later.

本文分析研究所得结论对今后预应力混凝土斜拉桁架桥结构特性的进一步研究和优化设计具有一定的借鉴作用。

One of the most noticeable structual differences between the cable-stayed bridge and the truss and girder types lies in the field of flexibility.

斜拉桥与桁架和梁式类型桥之间，在结构上的一个最显著不同之处，在于柔度方面。

Extracting Truss bridge structure data in AutoCAD, then transforms it into ansys.

提取AutoCAD中的实体信息，将桁架桥等杆系结构模型导入到ANSYS中。

And AutoCAD tool software is utilized to draw the working drawing of steel structure truss.

并运用AutoCAD工具软件绘制出钢结构桁架的工作图。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。