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我国没有声屏障结构设计规范,更很少考虑设置声屏障对桥梁结构的力学影响。本文将其影响分为三种:桥面板的横向弯矩、主梁扭矩及独柱桥墩横向弯矩。建议声屏障结构设计基本风速重现期取50年,风荷载应考虑活载风与极限风两种情况,重要性系数取1.0。有限元分析结果表明,在风速较大、声屏障较高及桥墩较高时,桥梁段声屏障设计必须考虑其对桥梁结构的影响。
Our country does not have sound barrier structure design norms, and seldom consider the mechanical impact of setting sound barrier on bridge structure. This article divides its influence into three kinds: the transverse bending moment of deck slab, the torsion of main beam and the transverse bending moment of bridge pier. It is suggested that the design of acoustic barrier should take 50 years to reproduce the basic wind speed. The wind load should consider both the live load wind and the extreme wind condition, and the importance coefficient should be taken as 1.0. The results of finite element analysis show that in the case of large wind speed, high sound barrier and high piers, the design of bridge sound barrier must consider its influence on bridge structure.