Research on Application of Steel-Concrete Composite Members filled with Rigid Urethane to Structures

硬质聚氨酯填充钢-混凝土组合构件在结构中的应用研究

• 批准号: 15560419
• 负责人: OTA Teiji
• 金额: $ 2.37万
• 依托单位: Takamatsu National College of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560419/
• 关键词: Rigid Urethane; Steel-Concrete Composite Bridge; Vibration Test; Damping Ratio; 振動減衰; 鋼コンクリート合成床版橋; 現場振動計測

Steel-concrete composite member, the tension side concrete of which is replaced with light weight urethane, is used efficiently in low height bridges because it helps to reduce bridge weight. However, low height bridges tend to vibrate easily. In the first stage of the research (in 2003), we verified the effect of urethane, performing vibration tests on three steel-concrete composite slab bridges ; two filled with rigid urethane and one filled completely with concrete. The test result showed that rigid urethane increases damping ratio by more than 50 percent.In the second stage (in 2004-2005), we verified vibration property of steel plates with rigid urethane because we thought that rigid urethane attached to steel plates could reduce noise from the bridge. We performed two kinds of vibration tests (impact loading test and vibration test on a shaking table) on steel plates with various urethane thickness.Impact loading test : When we dropped a golf ball on a 3mm-thick steel plate with 150mm-thick urethane to check vibration in high-frequency region, damping ratio was approx. 4 times comparing a steel plate without urethane. When we dropped a softball on the above plate to check vibration in low-frequency region, damping ratio was approx. 2 times.Vibration test on a shaking table : On the other hand, it was confirmed that attaching urethane to steel plates increases the acceleration response of steel plates when vibrating steel plates with rigid urethane on a shaking table.

钢质混凝土复合构件，其张力侧混凝土被轻巧的氨基甲酸酯代替，在低高度桥梁中有效使用，因为它有助于降低桥梁的重量。但是，低的高度桥往往容易振动。在研究的第一阶段（2003年），我们验证了尿电烷的作用，对三个钢结构复合板桥进行了振动测试。两个充满刚性的氨基甲酸酯，一个完全充满混凝土。测试结果表明，刚性的尿电烷将阻尼比增加了50％以上。在第二阶段（2004-2005），我们验证了具有刚性氨基甲酸酯的钢板的振动特性，因为我们认为与钢板上的刚性尿氨酸固定在钢板上可以减少桥梁的噪声。我们对具有各种尿素厚度的钢板进行了两种振动测试（在摇动台上进行冲击负载测试和振动测试）。Impact负载测试：当我们将高尔夫球放在带有150mm厚的钢板上的高尔夫球上，带有150mm厚的尿道氨基烷烷，以检查高频率区域的振动时，湿率是湿率的振动。 4次比较没有氨基甲异烷的钢板。当我们将垒球放在上板上以检查低频区域的振动时，阻尼比约为。 2次。振动桌子上的振动测试：另一方面，确认将氨基甲酸酯连接到钢板上会增加钢板的加速度响应，而在摇动桌上振动用刚性尿氨酸的钢板进行振动。