水平桁
平板围壁应该使用垂直扶强材和水平桁加强并且提供有扶手的步行平台。
The flat steel plate wall shall be strengthened by the vertical stiffeners and horizontal webs, and provided with walking platform with handrails.
结果表明：在钢桁梁桥弦杆内填混凝土能降低杆件的应力水平，提高桥梁的整体刚度。
The results show that the stresses of chord members of partially concrete-filled steel truss bridge are decreased, while its integral stiffness is increased.
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