| Summary: | 碩士 === 中華大學 === 土木與工程資訊學系碩士班 === 95 === The occupational injury in construction is always in high proportion. The collapses of high-rise bridge structure steel supporting systems own a large portion of it, and also have large influence on the society. Because many national traffic infrastructure projects have been sprouted these years, the use of structure steel supporting systems becomes more and more often. So it’s very important to make some strategies to cope with the accidences. From the statistics of occupational accidences, the large sized structural steel supporting systems often cause serious injuries and capital loss. To prevent the occurrence of the accidences, the safety performance of the structure steel supporting system should be raised first.
The concept of reliability is used in this research as the basis to study the performance of the structural steel supporting system. The factors of the collapse and the key elements were found via accidences and structural analysis. By finite-element analysis as well as analyze and discuss of the model based on reliability (the Load and Resistence Factor Design, LRFD), a structure with uniform reliability can be obtained. We find out the oppress damage and the strength medal by sap2000, and the influence of oppressive stress, oppressive stress, unbalance geography. Each parameter to the reliability of the system can be quantified in a theoretically consistent way. Best design parameters and collapse prevention guide are made for the construction industry to prevent the accidences.
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