1) top chord
上弦
1.
Planar BSS with top chords of H-section can be made conveniently,and its joints can be connected easily,but the system is sensitive to the imperfection out of plane because the member of H-section has small stiffness out of plane.
H形截面上弦平面张弦梁结构具有制作方便、便于节点连接的优点,但由于H钢截面构件具有平面外刚度较小的特点,对平面外的缺陷非常敏感,在施工过程中若对此没有采取有效措施,结构会发生平面外失稳,以至无法施工。
2) top boom
顶弦,上弦
3) around beam
上弦梁
1.
Analyzing the influence of the around beam s stiffness on the strength and stiffness of the locomotive body;
上弦梁刚度对机车车体强度和刚度的影响分析
4) wave on dichotomy
弦上波
1.
The paper introduces wave on dichotomy and stationary wave and the difference between them.
本文主要介绍了弦上波与驻波及其之间的差
6) Continuous beam disconnection
上弦断开
补充资料：上弦
见月相。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条