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Jiajun Tao,Xiaoshuang Ding 한국중국어교육학회 2022 중국어교육과연구 Vol.- No.37
开展来华研究生学术汉语需求调查研究是构建学术汉语教学与研究体系的起点和基础。本研究采用深度访谈法,对20名来华研究生的学术汉语需求进行了调查。访谈对象包括11名硕士生和9名博士生,所学专业涉及经济学、法学、教育学、文学及管理学等多个学科。访谈结果显示,来华研究生普遍存在学术汉语能力有限、难以胜任学术研究的情况;其对学术汉语存在较大需求,亟需开设相关的学术汉语课程,尤其是学术汉语写作课程。针对留学生的需求以及存在的问题,本文建议完善汉语水平考试(HSK)体系,增设学术类汉语水平考试;鼓励高校分专业开展学术汉语诊断性评估测试;适当增设学术汉语相关课程。
Analytical and Experimental Studies on All-Steel Buckling Restrained Brace with Double Steel Tubes
Jinhe Gao,Jiahuan Xi,Jiajun Ding,Yuwen Xu,Junwen Zhu,Yi Chang 한국강구조학회 2022 International Journal of Steel Structures Vol.22 No.1
This study proposes a new type of all-steel buckling restrained brace with double steel tubes composed of an inner round steel tube and an outer square steel tube, the inner core adopting a cruciform section and an H-section. These two types of cross-sectional inner cores have larger cross-sectional stiff ness than round bars and better meet the requirement that inner core should be easy to yield but not easy to buckle. In this study, a theoretical design method for designing the proposed BRB in a simplifi ed and optimal way is presented. The assembly scheme, constraint system, and overall structure are defi ned. The quasi-static tests of two brace specimens under a cyclic load are carried out to verify the brace's mechanical performance, axial strain distribution, and energy dissipation capacity. These results show that, relying on these two types of cross-sections, the hysteresis curves of all-steel buckling restrained braces with double-steel tubes are overall in good shape and stable. In addition, its energy dissipation performance is stable without any widespread instability phenomena. Also, the inner core has a stable plastic deformation capacity even after yielding, based on the comparative analysis of axial strain response of each components. Both specimens can meet the requirements of seismic design.