Single-girder bridge by a single main beam and in the end beam span both sides of the composition, dual-beam bridge consists of two main beams and side beams formed.

单主梁桥架由单根主梁和位于跨度两边的端梁组成，双梁桥架由两根主梁和端梁组成。

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Based upon dozens of analysis cases on gabled frames with different beam span, column height and roof grade, the behavior or influence of tension rod to frame stress and frame stability is determined.

本文依据刚架不同的横梁跨度、立柱高度、横梁坡度、设计了一系列的算例，在大量的算例分析结果的基础上，得到了横梁拉杆设置与设置位置对刚架梁柱构件内力、应力、稳定性影响的变化规律。

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In this dissertation, the shear lag effect for large span box-section beam structure and the structural nonlinear anti-seismic capability have been theoretically and experimentally investigated.

本论文主要针对大跨度箱形截面梁结构剪力滞效应和结构非线性抗震性能进行了较深入的理论分析和一定的试验对比研究。

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As the officers crawled on a beam, the span "seemed to shift, " and they could hear rivets popping amid victims' cries for help, Nelson said.

CNN: Officers sprang into action to help victims of bridge collapse