Basic Principal and Design Methodology of Progressive Storey Collapse Resistance in a New Type RC Twin-frame Structure
According to earthquake hazard, normal frame structures could hardly avoid failure of Strong Beam and Weak Column, weak layer and even progressive storey collapse under strong earthquakes, a main reason is the lack of second seismic fortification line in frame structure. Based on the design thought of multiple seismic fortification lines, reinforced concrete twin-frame structure is initiated in this paper. Major feature is increases of redundant constraints and load paths due to added outer limbcolumns could take effect as the second seismic fortification line. Twin-frame structure could not only fulfill the demand of three levels, two stages in seismic code, but also have been designed through the third stage of resist progressive collapse, using key member method to promote safety storage and deformability of outer limb-columns, using removal key member method to verify vertical ultimate load of frame beams in weak layer. Though twin-frame structure could not completely avoid plastic hinges in column ends, progressive storey collapse will not appear in this kind of structure. Twin-frame structure is a new structure system which could be applied in constituting new projects as well as strengthening and rebuilding existing projects, further research can be done on this structure system.
RC Twin-frame Structure Outer Limb-columns Stiff-flexible Mixed Structure Second Seismic Fortification Line Resist Progressive Collapse Design Method
Haohua Jia Demin Wei
China Construction Design International Consultants Co. ltd., Shenzhen, 518048, China School of Civi School of Civil and Transportation Engineering, South China University of Technology Guangzhou,Guang
国际会议
西安
英文
247-253
2011-09-22（万方平台首次上网日期，不代表论文的发表时间）