桥梁检测与加固实验报告（华中科技大学）(2)

实验二、悬索桥缩尺模型实验

【实验时间】

2015年12月18日下午

【实验说明】

（一）静载试验 1、贴应变片； 2、安装位移计；

3、预加载：预加载一级荷载（在主跨L/2、L/4、3L/4，边跨L/2上同时加载），每加载点15kN，每级停歇5分钟后读取数据。同时检查试验装置，试件和仪表工作是否正常，然后卸载，发现问题及时排除；

4、正式加载：仪表重新调零后，重新加载试验，共加载三种荷载工况，具体如下：

1）主跨满载：在主跨L/2、L/4、3L/4的加载点上分两级加载，每级加载点15kN，每级停歇5分钟后读取试验数据；

2）边跨满载：在边跨L/2加载点上分两级加载，每级每加载点15kN，每级停歇5分钟后读取试验数据；

3）全桥满载：在边跨L/2和主跨L/2上分两级加载，每级每加载点15kN，每级停歇5分钟后读取试验数据；

4）卸载：在以上各加载工况下分两级卸载，每级15kN，并停歇5分钟读取试验数据；

5）重复一次加载、卸载，读取试验数据。

（二）动载试验

1、结构模型上传感器与动态应变仪连接，设置好位移计，将全部仪器调零；

2、加载车按一定的速度在桥梁模型上运动，测量各测点的应变和跨中的动挠度；

3、改变加载车的运动速度，重复以上步骤。

【实验数据及分析】

一、测点布置、试验装置和测试系统图

二、数据

静载实验数据一、 通道1-8 通道1-9 通道1-10 通道1-11 通道1-12 通道1-13 通道1-14 通道1-15 通道1-16 通道1-17 通道1-18 通道1-19 通道1-20 通道1-21 时间 工程信息 0.760.76(0.00)0.00(0.00)(1.53)1.53(0.76)2.29(0.76)(0.00)0.00(5.34)179.2942356.60归零1(5.34)12.9711.4448.8357.9893.0887.7474.0183.1628.2326.700.7660.27138.8642356.60归零2(6.10)12.9711.4448.8357.9893.0887.7474.0183.9228.2326.700.0060.27116.7342356.61归零3(0.76)0.00(0.00)0.76(0.00)(1.53)1.53(0.76)2.29(0.76)(0.00)0.76(7.63)(38.15)42356.61归零49.9212.9711.4466.3880.11128.17121.31102.23116.7338.9137.387.63173.19189.2142356.61预压50N(0.76)0.00(0.76)0.763.05(2.29)4.58(1.53)5.34(0.76)0.760.76(15.26)(48.07)42356.61预载卸载8.3912.9711.4472.4890.79135.04134.28108.34128.1741.2041.203.81163.27184.6342356.61主跨满载121.3626.7024.41139.62167.85273.13260.93217.44247.9683.9280.871.53443.27471.5042356.61主跨满载212.9715.2613.7363.3270.19132.75122.07105.29116.7340.4438.152.29214.39251.7742356.61主跨卸载10.760.00(0.00)0.000.76(1.53)2.29(0.76)3.05(0.76)0.761.53(9.16)(36.62)42356.61主跨卸载21.53(1.53)(1.53)(2.29)(2.29)(6.10)(3.81)(3.81)(3.05)(2.29)(1.53)(1.53)(12.97)(64.85)42356.62变跨满载13.05(3.05)(2.29)(5.34)(5.34)(13.73)(9.16)(9.92)(7.63)(4.58)(3.05)(0.76)(9.92)(83.92)42356.62边跨满载20.76(2.29)(2.29)(2.29)(0.76)(6.10)(2.29)(3.81)(0.76)(2.29)(0.76)0.00(21.36)(77.06)42356.62边跨卸载1(0.76)(0.76)(0.76)1.533.810.003.81(0.00)4.58(0.76)0.760.00(25.18)(57.98)42356.62边跨卸载2(0.76)(0.76)(0.76)1.533.810.003.81(0.00)4.58(0.76)0.760.00(25.18)(57.98)42356.62边跨卸载3(0.76)8.397.6327.4736.6249.5950.3540.4448.8315.2615.260.7637.3835.1042356.62全桥满载10.0017.5515.2652.6466.3899.1896.1380.1192.3229.7628.993.05124.36141.1442356.62全桥满载20.768.397.6326.7032.8151.1249.5941.2048.0715.2615.263.8156.4657.2242356.62全桥卸载10.00(1.53)(0.76)0.763.05(0.76)3.05(0.00)3.81(0.00)0.760.00(20.60)(52.64)42356.62全桥卸载2 静载实验数据二、

页面 通道1-1 通道1-2 通道1-3 通道1-4 通道1-5 通道1-6 通道1-7 通道1-8 通道1-9 通道1-10 通道1-11 通道1-12 通道1-13 通道1-14 通道1-15 通道1-16 通道1-17 通道1-18 通道1-19 通道1-20 通道1-21 时间 工程信息 1.00(0.76)(0.00)0.00(0.00)0.000.00(0.00)0.000.00(0.00)0.00(0.00)0.00(0.00)(0.00)(0.00)(0.76)(0.00)0.001.530.0042356.62归零2.001.531.530.00(0.00)3.813.057.639.9212.2110.6867.9082.40130.46121.31103.76115.2039.6737.384.58179.29218.2042356.63预载3.00(0.76)(0.00)(0.76)(0.00)0.760.000.760.00(0.76)(0.76)0.00(0.76)0.00(0.76)(0.00)(0.76)(0.00)(0.00)1.535.346.1042356.63预载卸载读数4.001.531.53(2.29)(2.29)4.583.056.878.3913.7312.2170.9588.50135.04130.46107.57123.6041.2040.442.29173.95231.1742356.63主跨满载15.003.053.05(3.05)(2.29)8.396.1016.0220.6027.4724.41138.86167.85273.13258.64216.67244.9083.9280.113.81389.86506.5942356.63主跨满载26.001.531.53(1.53)(2.29)4.583.059.1612.2115.2613.7362.5668.67133.51119.78106.05113.6841.2037.383.05225.83292.2142356.63主跨卸载17.00(0.76)(0.76)0.00(0.00)0.760.000.760.000.00(0.00)0.760.760.00(1.53)(0.00)(1.53)(0.00)(0.00)2.291.532.2942356.63主跨卸载28.00(0.76)(0.76)4.583.050.000.001.531.53(0.76)(1.53)(3.05)(3.05)(6.87)(7.63)(5.34)(6.87)(2.29)(2.29)(1.53)(0.76)(20.60)42356.63边跨满载19.00(1.53)(0.76)8.396.870.00(0.76)3.053.05(1.53)(2.29)(6.10)(6.87)(13.73)(12.21)(10.68)(11.44)(4.58)(3.81)(1.53)7.63(35.10)42356.63边跨满载210.00(1.53)(0.76)3.813.050.000.001.530.76(0.76)(1.53)(2.29)(1.53)(6.10)(6.87)(4.58)(6.87)(2.29)(2.29)(1.53)(3.81)(23.65)42356.63边跨卸载111.00(1.53)(0.76)0.00(0.00)0.000.00(0.00)(0.76)0.00(0.76)0.762.290.00(0.00)(0.00)(0.76)(0.76)(0.00)(1.53)(6.87)(11.44)42356.63边跨卸载212.00(0.76)(0.00)3.051.532.291.531.530.009.928.3928.2335.1051.8848.8341.2045.7815.2615.26(1.53)66.3899.9542356.63全桥满载113.000.000.766.103.053.812.290.76(1.53)19.0716.7952.6467.9099.1896.1379.3590.7929.7629.763.05128.17190.7442356.63全桥满载214.00(0.76)(0.00)2.291.531.530.761.530.009.928.3926.7032.0450.3548.0741.2045.0115.2614.502.2971.7299.1842356.64全桥卸载1 15.00(1.53)(0.76)0.00(0.00)0.760.000.760.000.76(0.00)1.531.530.00(0.00)(0.00)(0.00)(0.00)(0.00)(2.29)(3.05)(3.05)42356.64全桥卸载2

三、悬索桥缆索变化计算与分析（图中，S代表索力，B代表位移，Y代表应变） a、主跨满载时

1、主梁内力—荷载曲线图

左半桥

右半桥

2、主塔内力—荷载曲线图

3、索力—荷载曲线图

左半桥

右半桥

4、位移—荷载曲线图

b、边跨满载时

1、主梁内力—荷载曲线图

左半桥

右半桥

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