| Summary: | 碩士 === 國立高雄應用科技大學 === 土木工程與防災科技研究所 === 98 === Walls are important structural elements in a building and often be vertically arranged to enclose or partition a designed area. Two kinds of walls are encountered in the structural designs, one is bearing wall and the other is not (such as space-partitioning walls). When walls are constructed to be a closed confined integration they play two roles: addition of stiffness of beams and columns as well as its damage provides the earthquake engineers an information on the judgment of overall seismic capacity of the building and therefore become the first benchmark of earthquake resistance. Most of the preliminary seismic assessment methods developed in recent years major focus on the inadequate amount of wall in bottom region of a building and were not applicable to those with weak layers above the first floor. This thesis is thus proposed to study the improvement of previously developed preliminary seismic assessment method to extend for analysis two to five-storey buildings containing one-floor discontinuous wall. Though experimental investigations have been conducted on the wall effects on the seismic performance of buildings, their high cost and manpower resources become a tremendous trade-off. This thesis presents an improved seismic assessment approach using ETABS based on the seismic assessment criteria developed by NCREE. In the improved method nonlinear static analysis (push-over analysis) is employed and analyzed through ETABS software. Classical typical school buildings are taken to be the cases to investigate the effects of wall amount of vertical corridor of brick partition walls on the overall seismic resistance performance. Among these cases of I-shape school buildings, there are two, three, four to five-storey structures are employed to make comparison study through ETABS modeling and analysis. Some items of the previous developed assessment tables such as “Adjustment Factors”, “Equivalent Strength of Column in Y-direction”, “Types of Wall,” “Basic Aseismic Performance E in Y-direction,” and so forth. Furthermore, inclusion of total area of floors above the weak layers has been attempted to propose an innovative approach for seismic assessment of school buildings with weak floors. It is shown that the results from the improved assessment table of weak layer in Y-direction above second floor are in agreement with the Ap values from the pushover analysis. The slopes of two curves are close to each other. The improved assessment tables proposed in this thesis can be applied to preliminary aseismic assessment of school buildings containing weak layers above first storey.
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