期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
A tendon system to re-center steel moment frames with weak stories
1
作者 Wang Tao Wang Fei Masayoshi Nakashima 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2024年第4期1057-1072,共16页
A wide open bottom story of a frame building is often expected by owners for use as a garage or shops.However,this leads to weak stories due to abrupt changes in lateral stiffness and often results in unexpected story... A wide open bottom story of a frame building is often expected by owners for use as a garage or shops.However,this leads to weak stories due to abrupt changes in lateral stiffness and often results in unexpected story collapse as observed in many previous earthquakes.To retrofit frame buildings that have experienced weak story damage,a tendon system is proposed in this study,which consists of a set of swaying columns and tendons.The swaying columns are used to uniformly redistribute the lateral deformation along the height,while the tendons provide extra lateral stiffness and renders the entire structural system a re-centering capability.To avoid unnecessary forces to swaying columns,pin-connections are used at the bottom.Tendons are placed over the entire story to gain large elastic displacements.Parametric analysis reveals that the swaying column,with a stiffness of about 0.9 times that of the weak story,and the tendons attached at the roof,with a stiffness of 0.04 times that of the weak story,can provide the optimal performance with a maximum residual story drift angle of less than 0.5%.Online hybrid tests were carried out,which demonstrated that uniformly distributed story drifts and acceptable residual deformation could be achieved by the proposed tendon system. 展开更多
关键词 tendon system re-centering capability residual deformation REHABILITATION collapse prevention
下载PDF
Rapid report of seismic damage to hospitals in the 2023 Turkey earthquake sequences 被引量:2
2
作者 Zhe Qu Feijian Wang +2 位作者 Xiangzhao Chen Xiaoting Wang Zhiguang Zhou 《Earthquake Research Advances》 CSCD 2023年第4期3-26,共24页
The seismic performance of medical systems is crucial for the seismic resilience of communities.The report summarizes the observed damage to twelve hospital buildings in the area affected by the MW 7.8 and MW 7.5 eart... The seismic performance of medical systems is crucial for the seismic resilience of communities.The report summarizes the observed damage to twelve hospital buildings in the area affected by the MW 7.8 and MW 7.5 earthquakes on February 6,2023 in Turkey.They include five base-isolated buildings and seven fixed-base buildings in southcentral Turkey's seven most heavily affected provinces.By relating the post-quake occupancy statuses of the hospitals with the estimated seismic demands during the earthquake doublet,the report offers the following observations:(1)the base-isolated hospital buildings on friction pendulum bearings generally exhibited superior performance of achieving the goal of immediate occupancy and provided better protection for nonstructural elements than fixed-base counterparts did;(2)the fixed-base hospital buildings of reinforced concrete structures constructed after 2001 successfully achieved the goal of collapse prevention even under very high seismic demands;(3)some fixed-base hospitals also remained operational even if they were very close to the fault rupture and were subjected to higher-than-design-level earthquake ground motions. 展开更多
关键词 Medical facility Base isolation Friction pendulum bearing Near-fault region Immediate occupancy Nonstructural element Seismic resilience RC frame Collapse prevention
下载PDF
Investigation on a mitigation scheme to resist the progressive collapse of reinforced concrete buildings
3
作者 Iman TABAEYE IZADI Abdolrasoul RANJBARAN 《Frontiers of Structural and Civil Engineering》 SCIE EI 2012年第4期421-430,共10页
This study presents the investigation of the approach which was presented by Thaer M.Saeed Alrudaini to provide the alternate load path to redistribute residual loads and preventing from the potential progressive coll... This study presents the investigation of the approach which was presented by Thaer M.Saeed Alrudaini to provide the alternate load path to redistribute residual loads and preventing from the potential progressive collapse of RC buildings.It was proposed to transfer the residual loads upwards above the failed column of RC buildings by vertical cables hanged at the top to a hat steel braced frame seated on top of the building which in turn redistributes the residual loads to the adjacent columns.In this study a ten-storey regular structural building has been considered to investigate progressive collapse potential.Structural design is based on ACI 318-08 concrete building code for special RC frames and the nonlinear dynamic analysis is carried out using SAP2000 software,following UFC4-023-03 document.Nine independent failure scenarios are adopted in the investigation,including six external removal cases in different floors and three removal cases in the first floor.A new detail is proposed by using barrel and wedge to improve residual forces transfer to the cables after removal of the columns.Simulation results show that progressive collapse of building that resulted from potential failure of columns located in floors can be efficiently resisted by using this method. 展开更多
关键词 prevent progressive collapse alternate load path reinforced concrete buildings nonlinear dynamic retrofitting cable steel hat braced frame barrel and wedge
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部