Experimental investigation of composite materials for sliding friction dampers: data, plots, photos and videos of the tests

Folder DATA This folder contains the data acquired by testing the friction pads M1, M2, M3, M4 and M5 under the following loading protocols: Linear static loading (M); Cyclic loading with constant amplitude (CA); Cyclic loading with decreasing amplitude at low rate (DA); Cyclic loading with increasing amplitude at low rate (IA); Cyclic loading with increasing amplitude at moderate rate (IA-H); Cyclic loading with increasing amplitude at high rate (IA-HH); Pulse-like loading protocol (PL); Mainshock-aftershock protocol (MS-AS): mainshock (MS), first aftershock (AS1) and second aftershock (AS2). The data include: Time: time (unit: second); F: axial force experienced by the sliding friction damper (unit: kN); N_bolt: bolt preload (unit: kN); mu: friction coefficient of the considered pad (unit: dimensionless); delta: axial displacement experienced by the sliding friction damper (unit: mm); Cum. delta: total cumulative displacement experienced by the sliding friction damper (unit: mm); Cum. E: total cumulative energy dissipated by the sliding friction damper (unit: kJ); max Tin: maximum temperature tracked close to the sliding interface (unit: Celsius); Tout: temperature tracked at the surface of the inner slotted plate (unit: Celsius). The data are organized as follows: Folder T100 This folder contains the data acquired under the linear static loading protocol (M) for a tightening torque of 100 Nm. Each EXCEL file T100_M_Y saved in the folder T100 contains the data obtained by testing the friction pad Y (Y = M1, M2, M3, M4, M5) under the loading protocol M. Folder T200 This folder contains the data acquired under the linear static loading protocol (M) for a tightening torque of 200 Nm. Each EXCEL file T200_M_Y saved in the folder T200 contains the data obtained by testing the friction pad Y (Y = M1, M2, M3, M4, M5) under the loading protocol M. Folder Fs150 This folder contains the data acquired for an expected slip load of 150 kN. Each subfolder Fs150_X contains the data obtained under the loading protocol X (X = M, CA, DA, IA, IA-H). Each EXCEL file Fs150_X_Y saved in the subfolder Fs150_X contains the data obtained by testing the friction pad Y (Y = M1, M2, M3, M4, M5) under the loading protocol X. Folder Fs300 This folder contains the data acquired for an expected slip load of 300 kN. Each subfolder Fs300_X contains the data obtained under the loading protocol X (X = M, CA, DA, IA, IA-H, IA-HH, PL, MS, AS1, AS2). Each EXCEL file Fs300_X_Y saved in the subfolder Fs300_X contains the data obtained by testing the friction pad Y (Y = M1, M2, M3, M4, M5) under the loading protocol X. Folder PHOTOS This folder contains the following photos: Folder 01_FrictionDamper: photos of the sliding friction damper and its components. Folder 02_Instrumentation: photos of the instrumentation used for the data acquisition during the experimental campaign. Folder 03_FrictionPads: Subfolder BeforeTesting: photos of the friction pads before the experimental campaign. Subfolder AfterTesting: photos of the friction pads at the end of each loading protocol. The photo Fs150vs300_X_Y shows the condition of the pad Y (Y = M1, M2, M3, M4, M5) at the end of the loading protocol X (X = M, CA, DA, IA, IA-H, IA-HH, PL, MS, AS1, AS2) performed for an expected slip load of 150 kN and 300 kN (the pads shown at the top of each photo are those tested for an expected slip load of 150 kN). Similarly, the photo Fs300_X_Y shows the condition of the pad Y at the end of the loading protocol X performed for an expected slip load of 300 kN. Folder 04_Tests: photos taken from the east and north side of the sliding friction damper during the loading protocols that caused the fracture of the pads Subfolder Fs150: photos taken during the tests conducted for an expected slip load of 150 kN. Each folder Fs150_X_Y contains the photos taken by testing the pad Y (Y = M1, M2, M4, M5) during the loading protocol X (X = CA, DA, IA, IA-H). Subfolder Fs300: photos taken during the tests conducted for an expected slip load of 300 kN. Each folder Fs300_X_Y contains the photos taken by testing the pad Y (Y = M1, M2, M4, M5) during the loading protocol X (X = CA, IA, IA-H). A video was recorded live during the loading protocols IA-HH, PL, MS, AS1 and AS2 (see folder VIDEOS). Folder PLOTS This folder contains the following MATLAB plots: Force-Disp: axial force – axial displacement response of the sliding friction damper; Preload-CumDisp: bolt preload as a function of the total cumulative displacement experienced by the sliding friction damper; FrictionCoeff-CumDisp: friction coefficient of the considered pad as a function of the total cumulative displacement experienced by the sliding friction damper; Temp-CumDisp: rise in temperature as a function of the total cumulative displacement experienced by the sliding friction damper (the temperature values reported for the expected slip load of 150 kN correspond to “max Tin”, whereas those reported for the expected slip load of 300 kN correspond to “Tout”); FrictionCoeff-LoadingHistoryEffect: friction coefficient of the considered pad as a function of the total cumulative displacement experienced by the sliding friction damper under different loading protocols; FrictionCoeff-RateEffect: friction coefficient of the considered pad as a function of sliding velocity experienced by the sliding friction damper under different loading protocols; FrictionCoeff-TempEffect: friction coefficient of the considered pad as a function of the rise in temperature tracked during different loading protocols; FrictionCoeff-PressureDependency: mean and standard deviation of the friction coefficient of the considered pad obtained for different expected slip loads and loading protocols; FrictionCoeffStaticDynamic-PressureDependency: mean of the static and dynamic friction coefficient of the considered pad obtained for different expected slip loads and loading protocols. The MATLAB plots are organized as follows: Folder T200 The MATLAB plots saved in this folder illustrate the data obtained by testing the friction pads M1, M2, M3, M4 and M5 under the linear static loading protocol (M) for a tightening torque of 200 Nm. Folder Fs150 and Fs300 The MATLAB plots saved in this folder illustrate the data obtained by testing the friction pads M1, M2, M3, M4 and M5 under the considered loading protocol (M, CA, DA, IA, IA-H, IA-HH, PL, MS-AS) for an expected slip load of 150 kN and 300 kN. Folder VIDEOS This folder contains the following videos: Folder T100: videos created from the photos taken during the tests conducted for a tightening torque of 100 Nm under the linear static loading protocol (M). The videos T100_M_Y_East and T100_M_Y_North show the test conducted on the pad Y (Y = M1, M2, M3, M4, M5) from the east and north side of the sliding friction damper respectively. Folder T200: videos created from the photos taken during the tests conducted for a tightening torque of 200 Nm under the linear static loading protocol (M). The videos T200_M_Y_East and T200_M_Y_North show the test conducted on the pad Y (Y = M1, M2, M3, M4, M5) from the east and north side of the sliding friction damper respectively. Folder Fs150: videos created from the photos taken during the tests conducted for an expected slip load of 150 kN. The videos Fs150_X_Y_East and Fs150_X_Y_North show the loading protocol X (X = M, CA, DA, IA, IA-H) applied to the pad Y (Y = M1, M2, M3, M4, M5) from the east and north side of the sliding friction damper respectively. Folder Fs300: videos created from the photos taken during the tests conducted for an expected slip load of 300 kN. The videos Fs300_X_Y_East and Fs300_X_Y_North show the loading protocol X (X = M, CA, DA, IA, IA-H) applied to the pad Y (Y = M1, M2, M3, M4, M5) from the east and north side of the sliding friction damper respectively. The videos obtained for the loading protocols IA-HH, PL, MS, AS1 and AS2 were recorded live during each test.## 文件夹 DATA 本文件夹存储了摩擦衬片（friction pad）M1、M2、M3、M4及M5在以下加载工况下的试验数据： 1. 线性静态加载（Linear static loading, M）； 2. 等幅循环加载（Cyclic loading with constant amplitude, CA）； 3. 低速递减幅循环加载（Cyclic loading with decreasing amplitude at low rate, DA）； 4. 低速递增幅循环加载（Cyclic loading with increasing amplitude at low rate, IA）； 5. 中速递增幅循环加载（Cyclic loading with increasing amplitude at moderate rate, IA-H）； 6. 高速递增幅循环加载（Cyclic loading with increasing amplitude at high rate, IA-HH）； 7. 脉冲类加载工况（Pulse-like loading protocol, PL）； 8. 主震-余震加载工况（Mainshock-aftershock protocol, MS-AS）：包含主震（Mainshock, MS）、第一余震（first aftershock, AS1）及第二余震（second aftershock, AS2）。 本数据集包含以下参数： - Time：时间（单位：秒，second）； - F：滑动摩擦阻尼器（sliding friction damper）承受的轴向力（单位：千牛，kN）； - N_bolt：螺栓预紧力（单位：千牛，kN）； - mu：待测摩擦衬片的摩擦系数（无量纲，dimensionless）； - delta：滑动摩擦阻尼器的轴向位移（单位：毫米，mm）； - Cum. delta：滑动摩擦阻尼器的总累积位移（单位：毫米，mm）； - Cum. E：滑动摩擦阻尼器耗散的总累积能量（单位：千焦，kJ）； - max Tin：滑动界面附近测得的最高温度（单位：摄氏度，Celsius）； - Tout：开槽内板表面测得的温度（单位：摄氏度，Celsius）。 ### 数据组织结构 1. **子文件夹 T100**：本文件夹存储了拧紧扭矩为100牛米（Nm）时，采用线性静态加载工况（M）的试验数据。文件夹T100内的每个Excel文件`T100_M_Y`，对应摩擦衬片Y（Y=M1, M2, M3, M4, M5）在加载工况M下的试验数据。 2. **子文件夹 T200**：本文件夹存储了拧紧扭矩为200牛米（Nm）时，采用线性静态加载工况（M）的试验数据。文件夹T200内的每个Excel文件`T200_M_Y`，对应摩擦衬片Y（Y=M1, M2, M3, M4, M5）在加载工况M下的试验数据。 3. **子文件夹 Fs150**：本文件夹存储了预期滑移荷载为150千牛（kN）时的试验数据。每个子文件夹`Fs150_X`对应加载工况X（X=M, CA, DA, IA, IA-H）的试验数据。子文件夹`Fs150_X`内的每个Excel文件`Fs150_X_Y`，对应摩擦衬片Y（Y=M1, M2, M3, M4, M5）在加载工况X下的试验数据。 4. **子文件夹 Fs300**：本文件夹存储了预期滑移荷载为300千牛（kN）时的试验数据。每个子文件夹`Fs300_X`对应加载工况X（X=M, CA, DA, IA, IA-H, IA-HH, PL, MS, AS1, AS2）的试验数据。子文件夹`Fs300_X`内的每个Excel文件`Fs300_X_Y`，对应摩擦衬片Y（Y=M1, M2, M3, M4, M5）在加载工况X下的试验数据。 --- ## 文件夹 PHOTOS 本文件夹包含以下照片集： 1. **子文件夹 01_FrictionDamper**：滑动摩擦阻尼器及其组成部件的照片。 2. **子文件夹 02_Instrumentation**：试验过程中数据采集所用仪器设备的照片。 3. **子文件夹 03_FrictionPads** - **子文件夹 BeforeTesting**：试验开始前的摩擦衬片照片。 - **子文件夹 AfterTesting**：各加载工况结束后的摩擦衬片照片。其中，照片`Fs150vs300_X_Y`展示了预期滑移荷载分别为150kN和300kN时，摩擦衬片Y（Y=M1~M5）在加载工况X（X=M, CA, DA, IA, IA-H, IA-HH, PL, MS, AS1, AS2）结束后的状态：每张照片上方的衬片为预期滑移荷载150kN工况下的试件。同理，照片`Fs300_X_Y`展示了预期滑移荷载300kN工况下，摩擦衬片Y在加载工况X结束后的状态。 4. **子文件夹 04_Tests**：导致摩擦衬片断裂的加载试验过程中，从滑动摩擦阻尼器东侧和北侧拍摄的照片 - **子文件夹 Fs150**：预期滑移荷载150kN工况下的试验照片。每个子文件夹`Fs150_X_Y`存储了摩擦衬片Y（Y=M1, M2, M4, M5）在加载工况X（X=CA, DA, IA, IA-H）试验过程中拍摄的照片。 - **子文件夹 Fs300**：预期滑移荷载300kN工况下的试验照片。每个子文件夹`Fs300_X_Y`存储了摩擦衬片Y（Y=M1, M2, M4, M5）在加载工况X（X=CA, IA, IA-H）试验过程中拍摄的照片。在加载工况IA-HH、PL、MS、AS1、AS2的试验过程中，同步录制了现场视频（详见文件夹VIDEOS）。 --- ## 文件夹 PLOTS 本文件夹包含以下MATLAB绘图文件： - **Force-Disp**：滑动摩擦阻尼器的轴向力-轴向位移响应曲线； - **Preload-CumDisp**：螺栓预紧力随滑动摩擦阻尼器总累积位移的变化曲线； - **FrictionCoeff-CumDisp**：待测摩擦衬片的摩擦系数随总累积位移的变化曲线； - **Temp-CumDisp**：温升随滑动摩擦阻尼器总累积位移的变化曲线（其中，预期滑移荷载150kN工况下的温度数据对应`max Tin`，300kN工况下对应`Tout`）； - **FrictionCoeff-LoadingHistoryEffect**：不同加载工况下，待测摩擦衬片的摩擦系数随总累积位移的变化曲线； - **FrictionCoeff-RateEffect**：不同加载工况下，待测摩擦衬片的摩擦系数随滑动摩擦阻尼器滑动速度的变化曲线； - **FrictionCoeff-TempEffect**：不同加载工况下，待测摩擦衬片的摩擦系数随试验过程中测得的温升的变化曲线； - **FrictionCoeff-PressureDependency**：不同预期滑移荷载及加载工况下，待测摩擦衬片摩擦系数的均值与标准差； - **FrictionCoeffStaticDynamic-PressureDependency**：不同预期滑移荷载及加载工况下，待测摩擦衬片静、动摩擦系数的均值。 ### MATLAB绘图文件的组织结构 1. **子文件夹 T200**：本文件夹内的MATLAB绘图展示了拧紧扭矩200Nm工况下，摩擦衬片M1~M5在线性静态加载工况（M）下的试验数据。 2. **子文件夹 Fs150 与 Fs300**：本文件夹内的MATLAB绘图展示了预期滑移荷载分别为150kN和300kN时，摩擦衬片M1~M5在各加载工况（M, CA, DA, IA, IA-H, IA-HH, PL, MS-AS）下的试验数据。 --- ## 文件夹 VIDEOS 本文件夹包含以下视频集： 1. **子文件夹 T100**：由拧紧扭矩100Nm、线性静态加载工况（M）下的试验照片生成的视频。视频`T100_M_Y_East`与`T100_M_Y_North`分别为从滑动摩擦阻尼器东侧、北侧拍摄的摩擦衬片Y（Y=M1~M5）的试验过程视频。 2. **子文件夹 T200**：由拧紧扭矩200Nm、线性静态加载工况（M）下的试验照片生成的视频。视频`T200_M_Y_East`与`T200_M_Y_North`分别为从滑动摩擦阻尼器东侧、北侧拍摄的摩擦衬片Y（Y=M1~M5）的试验过程视频。 3. **子文件夹 Fs150**：由预期滑移荷载150kN工况下的试验照片生成的视频。视频`Fs150_X_Y_East`与`Fs150_X_Y_North`分别为从东侧、北侧拍摄的，对摩擦衬片Y（Y=M1~M5）施加加载工况X（X=M, CA, DA, IA, IA-H）的试验过程视频。 4. **子文件夹 Fs300**：由预期滑移荷载300kN工况下的试验照片生成的视频。视频`Fs300_X_Y_East`与`Fs300_X_Y_North`分别为从东侧、北侧拍摄的，对摩擦衬片Y（Y=M1~M5）施加加载工况X（X=M, CA, DA, IA, IA-H）的试验过程视频。针对加载工况IA-HH、PL、MS、AS1、AS2的试验，已在每场试验中同步录制了现场原始视频。