Time history response and numerical models of a 3D shear frame

All the laboratory tests reported here have been conducted in the i4S laboratory, Indian Institute of Technology Mandi in India. The operating temperature has been the ambient room temperature which has been observed to be consistent within a range of 15-20o C which has been considered insignificant to cause any substantial thermal induced changes. The test setup is of a three-dimensional frame model that is designed in such a convenient manner that elements of this frame can be easily assembled or dismantled as needed without much complexity. The frame is excited using an impact hammer in different directions and locations (for more details see the section 2.4). A total of sixteen datasets for undamaged and three damaged conditions of the structure are recorded and shared in the raw format. Data contains following folders as- Experimental Data: A undamaged_section folder which contains Data file name as und_position1_28th_jan.xlsx with the abbreviations should be read as: und- undamaged, position1 –force is applied at 1st position, 28th_jan – 28th January 2022, similarly for damage types (Folder named as e.g., Damaged_type1) are represented as heavy, lightbeam, reduc for type 1, 2 and 3 damages respectively. Supporting MATLAB codes are also attached in respective folders. MATLAB Model: This folder contains 3 excel file as Damaged_type1, Damaged_type2, Undamaged, which represent heavy, light beam and undamaged beam respectively. This folder contains MATLAB files of 3D frame structure. ABAQUS Model: This folder contains 4 folders named as Damaged_type1, Damaged_type2, Damaged_type3, Undamaged, which represent heavy, light beam, reduced cross section and undamaged beam respectively. The folder contains ABAQUS files (e.g., project1.cae, project1.jnl) of 3D frame structure. Dynamic Analysis: This folder contains Abaqus1.xlsx file in which the acceleration response of Abaqus as well as experimental stored and in MATLAB file (Acceleration_comparision.m) Both responses compared. Frequencies comparison: In this folder there is a file named comparision.xlsx, which is created for the comparison of frequencies of damaged and undamaged section. Nano-indentation test Data: This data is used for the determination of modulus of elasticity of material. In this folder there is three files named as sample_pos (1,2,3) which means data collected from 3 different position of sample. Noise Data: In this folder, there is a file (named main.m) used for the calculation of noise and covariance of noise of the instrument (accelerometer, strain sensor, impact hammer) and a Test_cov.xlsx is the data file of the noise of respective instrument. Nonlinear Stress-Strain data: This folder contains 2 file ( rambur_osgoods.m and ramburg osgoods.xlsx) which contains actual stress-strain data and optimized ramburg osgoods data of the material.

本研究报告的全部实验室测试均于印度曼迪印度理工学院的i4S实验室（i4S Laboratory, Indian Institute of Technology Mandi, India）完成。测试环境温度为室内室温，经观测其波动范围稳定在15~20℃，该温度波动幅度极小，不会引发显著的热诱导变化。本次测试采用三维框架模型搭建试验台，该模型设计便捷，框架构件可根据需求轻松组装或拆卸，操作复杂度极低。试验通过冲击锤（impact hammer）在不同方向与位置对框架施加激励（详细说明参见2.4节）。本数据集共包含16组原始格式的测试数据，分别对应结构的1种未损伤工况与3种损伤工况。数据包含以下文件夹：
1. "Experimental Data（试验数据）"：内含undamaged_section（未损伤组）文件夹，其中数据文件命名为`und_position1_28th_jan.xlsx`，命名规则说明如下：`und`代表未损伤（undamaged），`position1`表示在第1个位置施加激励，`28th_jan`代表2022年1月28日。损伤类型对应的文件夹命名示例如下：以`Damaged_type1`（损伤类型1）为例，分别对应重度损伤、轻梁损伤与截面缩减损伤（对应损伤类型1、2、3）。各文件夹中还附带了配套的MATLAB代码。
2. "MATLAB Model（MATLAB模型）"：内含3个Excel文件，分别为`Damaged_type1.xlsx`、`Damaged_type2.xlsx`与`Undamaged.xlsx`，依次对应重度损伤、轻梁损伤与未损伤工况的梁模型。该文件夹还包含三维框架结构的MATLAB相关文件。
3. "ABAQUS Model（ABAQUS模型）"：内含4个文件夹，分别为`Damaged_type1`、`Damaged_type2`、`Damaged_type3`与`Undamaged`，依次对应重度损伤、轻梁损伤、截面缩减损伤与未损伤工况。该文件夹包含三维框架结构的ABAQUS文件（如`project1.cae`、`project1.jnl`）。
4. "Dynamic Analysis（动力学分析）"：内含`Abaqus1.xlsx`文件，存储了ABAQUS仿真与试验获取的加速度响应数据；同时附带MATLAB文件`Acceleration_comparision.m`，用于对比两类加速度响应结果。
5. "Frequencies comparison（频率对比）"：内含`comparision.xlsx`文件，用于对比损伤与未损伤工况下结构的固有频率。
6. "Nano-indentation test Data（纳米压痕测试数据）"：该部分数据用于测定材料的弹性模量。文件夹内含3个文件，命名为`sample_pos(1,2,3)`，分别代表从试样3个不同位置采集的测试数据。
7. "Noise Data（噪声数据）"：内含文件`main.m`，用于计算试验仪器（加速度传感器（accelerometer）、应变传感器（strain sensor）、冲击锤（impact hammer））的噪声与噪声协方差；另有`Test_cov.xlsx`文件，存储了各仪器的噪声测试数据。
8. "Nonlinear Stress-Strain data（非线性应力-应变数据）"：内含2个文件，分别为`rambur_osgoods.m`与`ramburg osgoods.xlsx`，存储了材料的实测应力-应变数据与优化后的Ramburg-Osgood本构模型数据。