预应力钢结构 meaning in English
prestressed steel structure
prestressed tendon
Examples
- Pre - stressed steel structure , a new kind of structure in which combined pre - stress with steel structure , can take full advantage of the elastic strength of steel , and multiple pre - stressed steel structure can repetitively make full use of the elastic strength of steel , thus it can enhance the structural capacity and further improve the rigidity of structure , proving that it is more economic than single pre - stress . therefore , it is both theoretically and practically important to conduct in - depth research on multiple pre - stressed steel structure
预应力钢结构是一种将预应力与钢结构相结合的新型结构，预应力钢结构通过施加预应力以充分利用钢材弹性范围内强度，而多次预应力钢结构可以反复利用钢材弹性范围内极限强度，提高结构承载能力并进一步提高结构刚度，比单次预应力具有更好的经济效益，因此，对预应力钢结构进行深入研究具有重要的理论意义和工程应用价值。 - The main work of this paper was as fellows : ( 1 ) generalized the development of pre - stressed steel structure in our nation and abroad , and pointed out the main problem in practice ; ( 2 ) presented the mechanism of pre - stressed steel structure and revealed its applicable range ; ( 3 ) established the optimization design model for pre - stressed steel structure , which accounts for constraints on stresses and displacements of structure ; ( 4 ) brought forward the optimization design method , which combined linear programming and the principle of full restriction , through which we can obtain the magnitude of each time pre - stress and the optimized sections of each members of structure ; ( 5 ) analyzed the best times of pre - stress and pointed out that 2 ~ 3 times is preferable ; ( 6 ) conducted optimization design on large - space steel roof , horizontal parallel steel truss with local cables , horizontal parallel steel truss with global cable , and ultra - static steel truss , the result of which indicated that the multiple pre - stress structure is very economic ; ( 7 ) compared different schemes of cable placement for horizontal parallel steel truss , and the results showed that the local cable only unloaded the second girders , but had no response on the first girders and stomach poles , while global cable could unload the second girders and the stomach poles outside of turning point of cable , thus proving that global cable is more economic than local - cable
本文的主要工作是：对国内外预应力钢结构的发展历史及现状作了综述和总结，指出当前预应力钢结构工程实践中存在的主要问题；阐述了预应力钢结构的受力机理，并指出预应力钢结构的适用范围和特点；在考虑结构应力和变位约束的条件下，建立预应力钢结构优化设计模型；提出多次预应力钢结构优化设计方法和步骤，采用线性规划和满约束准则相结合的优化方法，可优化设计出施加的每一级预应力的大小，并得到结构各部分的优化截面；对多次预应力最佳的施加次数作了分析，并建议以2 3次为宜；为验证文中理论和方法，分别对大跨多次预应力钢屋架、局部布索的水平平行弦钢桁架、整体布索的水平平行弦钢桁架和局部布索的超静定钢桁架等算例进行了优化设计，经济效益明显；对水平平行弦钢桁架的几种施加预应力的方案进行比较，对于局部布索，预应力只对下弦起到卸载作用，对上弦和腹杆基本不起作用；而整体布索预应力除对下弦卸载外，对索折点以外部分腹杆也起到卸载作用，经济效益好于局部布索。 - The study of this paper show that considering reliability in pre - stress steel structure is necessary and can answer the structure design criterion as well as standard demand . besides , the research methods provide the theoretical base for applying the reliability in practical pre - stress steel structure optimal design
本文工作表明，在预应力钢结构的优化设计中考虑到可靠性是有必要的，符合国家结构设计规范和标准要求，本文的方法为基于可靠度进行预应力钢结构优化设计的工程应用奠定了基础。 - An optimal model of pre - stress steel truss is presented based on reliability . the reliability index is replaced by subentry coefficient in optimal model restrict equation , and deal with corresponding restrict conditions with applied expressions . linear programming associated with full - constrained methods are used in this paper , which improve the profit of multi - pre - stress steel structure design and the reliability of structures as well as model and arithmetic
本文分析考虑可靠性的预应力钢结构的优化理论，建立了基于可靠性的预应力钢结构的优化模型，将可靠度指标以分项系数的形式引入优化模型的约束方程当中，以实用表达式形式处理相应的约束条件，并采用线性规划和满约束准则结合的方法进行优化，既提高了多次预应力钢结构设计的效益，又保证了结构的可靠性，模型和算法更加完善。