不等跨 meaning in Chinese

unequal span

Finite element simulation of whole excavation operation of a unequal - span double - arch tunnel
不等跨连拱隧道施工全过程的有限元模拟
In staged construction process , study is primarily aimed at the truss load resistance capacity and flexural performance under construction and design load , combination performances of steel trusses in conjunction with concrete beam , the vertical displacement difference of two steel trusses with different span and their lateral stability , the glide displacement of the steel truss end during construction , the load resistance performance of steel trusses and concrete structure at the designed load , and the extreme limit loads and the breaking appearance of the combined steel trusses
主要研究了在阶段施工过程中，钢桁架在施工荷载及设计荷载下的受力性能和变形能力；钢桁架与混凝土梁板的共同工作性能；两榀不等跨钢桁架在整体受力下的竖向位移差及其对结构的作用和侧向稳定性；钢桁架端部在施工阶段的滑动情况；使用阶段钢桁架及其端部混凝土结构的受力性能；组合钢桁架结构的极限承载力和破坏形态。