在管道跨越工程中，常用三角形截面组合管拱，由三角形截面桁梁的受力分析图，分析推导出其抗剪刚度。
The pipeline bridge is built up with triangle sections, its shear stiffness can be derived from the stress diagram for the truss with triangle section.
柱梁线刚度比影响初始的弹性弯矩图，其中包括初始次弯矩。
The ratio of column rigidity to beam influences the original elastic moment and the secondary moment.
又由逐渐趋于稳定的应力条纹图得出梁的最大冲击应力并做了相应的讨论。
The maximum impact stress is determined by means of stress fringe patters tending to be stable and relevant discussion is made.
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