portal span

Analysis of Applied load and Displacement of More Than One Span Steel Structure of Portal Frames With and Without Hinges

多跨无铰与有铰钢结构门式框架承载力及位移的对比分析

This thesis investigates the parameters, such as the initial tension of cable, the cross-section of cable, the wind load, the span of frame, the height of frame and the spacing of frame, which influence the load-carrying behavior of the prestressed portal frame.

研究了拉索的初拉力、拉索的截面积、风荷载、门架的跨度、门架的高度、门架的间距等参数对预应力门式刚架受力性能的影响；

It is easily collapsed for shallow and unsymmetrical large-span tunnel near portal in soft rock.

软岩地区浅埋偏压大 跨度 隧道进口段极易塌方.

The text introduces construction technics of install upside crossbeam on ice in winter which adopt span pillar portal frame when stage of construction was cross two years in cold area.

主要介绍了寒冷地区跨年施工的桥梁采用跨墩龙门利用冬季冰面安装上部大梁的施工工艺。