Design and application of strain monitoring system in real size steel buildings

• Main Authors: Wen-JunWu, 吳文俊
• Other Authors: Sheng-Hao Zhu
• Format: Others
• Language: en_US
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/d8h2xj

碩士 === 國立成功大學 === 土木工程學系 === 105 === The construction of large-scale engineering facilities is increasing with the demand of society. Some large-span bridges and large space structures are affected by coupling factors such as environmental erosion, material aging, fatigue strain, etc., resulting in structural damage accumulation and resistance to natural disaster capacity decline, and even cause unexpected accidents. Before the accident, the structure has appeared cracks or deformation, if appropriate testing and monitoring measurements are taken, it is likely to avoid accidents or minimize the damage of accidents. The structure health monitoring systems have been increasingly applied to various types of practical structures. The primary method for evaluating the safety of a structure is to consider the maximum stress or strain generated in a structure by gravity loads, wind loads, seismic loads and unexpected loads. The strain monitoring system is composed of monitoring instruments and data acquisition system. The strain gauges are used to measure the strains of the real size steel building. The 6411 series strain amplifiers are used to amplify and adjust the low-level signals of strain gauges, and then supply to the USB data acquisition system. The measurement program is used to display the strain during the experiment and archive the data. Next, the finite element model is performed to analyze the strains of the real size steel building. The results of the finite element analysis are compared with the experimental results. The monitoring system can effectively measure the strain of the structure during the whole static load experiment. Finally, for the problems in the experiment, improve the measurement program and test the program, so that the entire strain monitoring system can be better applied to the strain measurement.