A Case Study of Braced Portal Frame System and Light Weight Concrete Material for A Primary School Building on Seismic Resistance

• Main Authors: Jia-Lun Liu, 劉佳倫
• Other Authors: Guan-Chyun Shiah
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/83215173005750103085

碩士 === 國立高雄應用科技大學 === 土木工程與防災科技研究所 === 99 === This paper makes a case study of an elementary school in Feng-shan District, Kaohsiung City. According to “handbook for seismic evaluation and standard of school buildings” issued by National Center for Research on Earthquake Engineering (NCREE) in 2009, this study analyzes elementary school building adopting lightweight aggregate concrete and frame bracing retrofit system, conducts seismic evaluation, as well as compares its seismic performance with normal-weight-concrete structural system, shear-wall retrofit structure and concrete-jacketing structural system. If space permits, frame bracing retrofit system can be applied into school building retrofit scheme; its seismic performance is compared with shear wall and concrete jacketingproposals. Adopting shear wall and concrete jacketing retrofit affects main structure of school building. The construction will make existed Reinforced Concrete crack, especially old school building whose structure strength is greatly influenced. Therefore, frame bracing is proposed as a new way of retrofitting. This paper uses ETABS program to make a seismic evaluation for structural system of the study object. It also compares the research object with commonly-used shear wall retrofit and concrete jacketing, thus to judge whether it meets requirements stipulated in seismic standards issued by NCREE and provide an easier way of retrofit construction. Moreover, this study applies lightweight aggregate concrete into the target school building and evaluates its seismic performance. During site operation, the application of frame bracing retrofit doesn’t destroy the framework system of school building and affect its usability so much. In addition, this method brings an improvement in seismic capacity and A P value. Consequently, it provides more and better ways of school building retrofit nationwide. The replacement of current concrete with lightweight aggregate concrete reduces the weight of building structure although it doesn’t significantly enhance AP value. Through a preliminary investigation, this study finds the calculation of AP value is closely related with school building cycle.