日本三井和风桥(Mii Soyokaze Brodge)位于神奈川县相模原市绿区的津久井湖,与三井大桥相邻(见图1),是一座长231m的人行桥,结构形式为单跨加劲悬索桥,桥面净宽3.0m,设计荷载为人群荷载(2.59kN/m2)+紧急车辆(70kN/台),总用钢量403.5t。既有的三井大桥于1964年建成,是一座钢系杆拱桥,桥面净宽5.5m,2车道,限载标准为14t。当地居民要求三井大桥能增设人行道,但由于既有桥 Miyagi, Japan’s Mii Soyokaze Brodge is located in Tsugaru Lake, a green area in Sagamihara, Kanagawa Prefecture, adjacent to the Mitsui Bridge (Figure 1). It is a 231m long pedestrian bridge with a single span suspension stiffening suspension bridge and a bridge deck Width 3.0m, design load for the crowd load (2.59kN / m2) + emergency vehicles (70kN / unit), the total amount of steel 403.5t. The existing Mitsui Bridge was completed in 1964. It is a steel tied arch bridge with a clear net width of 5.5m and two lanes with a limit load of 14t. Residents asked the Mitsui Bridge to add sidewalks, but because of the existing bridge