一、前言 钢桥历来采用油漆来防锈防腐蚀,但近年来油漆费用昂贵,致使钢桥造价和维护费用大增,所以节省维修费用就成为主要课题。 为此,无油漆的耐候性桥梁,很早就受到了极大的关注。 日本国营铁路为了节省油漆费用,首次使用耐候性钢材建成了无油漆桥梁(国营铁路会 I. INTRODUCTION Steel Bridge has traditionally used paint to prevent rust and corrosion. However, the cost of paint is expensive in recent years, resulting in a substantial increase in the cost and maintenance cost of steel bridges. Therefore, saving maintenance costs has become a major issue. To this end, paint-free weathering bridge, has long been a great concern. Japanese state-owned railway In order to save paint costs, the first use of weatherable steel built without paint bridges (State Railway