1) multi span beams
多跨梁
1.
In this paper, dynamic response of multi span beams caused by moving vehicles has been analyzed by using modal superposition method and the finite element method.
分析多跨梁在移动车载作用下的动响应 。
2) multi-span beam with elastic supports
弹性支撑多跨梁
3) multi-span
多跨
1.
Simulation Analysis for Staged Construction of a Multi-span Prestressed Continuous Bridge;
一座多跨预应力混凝土连续梁桥的施工过程分析
2.
Research on the Key Technology in Construction Control of Multi-span Continuous Beam Bridge;
多跨预应力混凝土连续梁桥施工控制关键问题研究
3.
The main contents of design and the characteristic of long continuous unit and multi-span bridge were introduced.
王万线松花江大桥主桥采用了中间一孔为刚构的( 60+9×96 +60 )m的预应力混凝土刚构连续梁桥,联长达986m,集长联、大跨于一体,且位于严寒地区,介绍该桥的主要设计内容和长联多跨桥设计中的特殊问题。
4) multi-span tube
多跨管
1.
Computer-aided calculation for the natural frequencies of multi-span tube;
多跨管自振频率的计算机程序
5) multi-span steel beam
多跨钢梁
6) multi-story and multi-span
多层多跨
1.
In the design of the multi-story and multi-span prestressed concrete frame structures(PCFS),tendons of frame beams usually were designed by crack resistance capacity and it was hard to avoid "strong beam-weak column" and "strong element-weak joint" around inner beam-column joints.
在设计多层多跨预应力混凝土框架结构时,一般按抗裂度控制条件计算预应力筋后再按允许的预应力度确定普通钢筋的数量,则节点抗剪强度不足和“强梁弱柱”难以避免;如果满足梁的截面相对受压区高度的结构位移延性规定,则梁的抗裂度不易满足。
参考词条
补充资料：多苯基多亚甲基多异氰酸酯
多苯基多亚甲基多异氰酸酯，简称PAPI，或称粗MDI，浅黄色至褐色粘稠液体．有刺激性气味。相对密度(20℃／20 ℃)1．2，燃点218℃。PAPI实际上是由50％MDI与50％官能度大于2以上的多异氰酸酯组成的混合物。升温时能发生自聚作用。溶于氯苯、邻二氯苯、甲苯等。PAPI的活性低，蒸气压低，只是TDI的百分之一，故毒性很低。
用于制造聚氨脂胶粘剂。也可直接加入橡胶胶粘剂中，改善橡胶与尼龙或聚酯线的粘接性能。贮存于阴凉、通风、干燥的库房内，远离火种、热源。严格防水、防潮，避免光照。
用于制造聚氨脂胶粘剂。也可直接加入橡胶胶粘剂中，改善橡胶与尼龙或聚酯线的粘接性能。贮存于阴凉、通风、干燥的库房内，远离火种、热源。严格防水、防潮，避免光照。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。