upper chord meaning in English
上弦杆
上楔材料
Examples
- The possible shear of the upper chord will change beam from flexural member to member under flexure and compression force . this is emphasised through design example . as a result ， we find that composite floor system is good for reducing the height of floor system
在组合楼盖体系设计中，笔者指出，可能的桁架弦杆剪力会使作为桁架弦杆侧向支承的梁由弯曲构件变为压弯构件，这是在与桁架体系相适应的楼盖体系设计中应该注意的一个环节。 - The paper presented a large annular cantilever beam string stadium roof structure using the theory of beam string structure . the stadium roof structure is a novel structure that is reasonable in bearing force by using the character of the tendon and beam fully . the struts in the structure avoided enduring big moment , moreover the pre - stress upper chord tendon and the annular beam work together to resist upward and downward load , as embody the structure ' s artifice and wonderful space mechanical property
本文利用张弦梁原理，给出了一种大型环状悬臂型张弦梁挑蓬结构，该种体育场挑蓬结构新颖，充分利用了拉索和立体桁架受力的特点，使得结构受力更加合理，避免了柱子承受较大的弯矩，上弦索的预张力和圈梁使结构共同作用抵抗上下荷载，更体现了结构的巧妙和良好的空间受力性能。 - To meet the demands for large space and flexible compartmentation of buildings , laminated vierendeel trusses are adopted in high - position transfer story structures . first the bearing characteristics are analyzed , in which reasonable stiffness ratio of the upper chord , middle chord , and lower chord is derived . then combined with an actual engineering model ( 1 8 similar ratio ) , the static loading and pseudo - dynamic tests of two models for laminated vierendeel truss used in transfer story structures are conducted , in which one model adopts reinforced concrete , and the other adopts prestressed concrete and shape steel concrete . seismic behaviors are analyzed , including inter - story displacement , base shear - displacement skeleton curves , and equivalent viscosity - damping curves . a program is programmed to carry out the elasto - plastic dynamic analysis , and displacement time - history curves of the two models are derived . the test and analysis results show that the laminated vierendeel truss with prestressed concrete and shape steel concrete has excellent seismic behaviors . it can solve the disadvantages of laminated vierendeel trusses used in transfer story structures . finally , some design suggestions are put forward , which can be referenced by similar engineering
为满足建筑物大空间和灵活隔断要求,在高位转换层结构中采用迭层空腹桁架结构.首先分析了其受力性能,得出了空腹桁架各构件合理的截面刚度以及布局形式.然后结合一实际工程,进行了两榀迭层空腹桁架转换结构模型( 1 : 8相似比)的竖向荷载下静力试验以及拟动力试验.其中一榀为普通混凝土迭层空腹桁架,另一榀配置了预应力和钢骨混凝土,对比分析了两模型的层间位移比、骨架曲线以及等效粘质阻力系数等抗震性能的比较,并进行了弹塑性动力分析.试验和分析结果表明,配置预应力和型钢混凝土的迭层空腹桁架转换结构具有良好的抗震性能,可以成功地解决迭层空腹桁架作为转换层结构所产生的弊端问题,最后对这类转换层结构提出了相应的设计建议