为研究悬臂梁段拼接节点对带填充墙钢框架的抗震性能影响,进行了一榀1/2缩尺带砌体填充墙的悬臂梁拼接钢框架的拟静力试验,并进行了ANSYS有限元验证及参数分析。对结构的全阶段加载的破坏模式、应变变化、滞回曲线、位移延性、骨架曲线...为研究悬臂梁段拼接节点对带填充墙钢框架的抗震性能影响,进行了一榀1/2缩尺带砌体填充墙的悬臂梁拼接钢框架的拟静力试验,并进行了ANSYS有限元验证及参数分析。对结构的全阶段加载的破坏模式、应变变化、滞回曲线、位移延性、骨架曲线、割线刚度及其退化规律和等效黏滞阻尼比等进行分析。试验结果表明:该结构的承载力为183 k N,极限位移为11 mm,位移延性系数为1.88,具有良好的承载能力和位移延性;填充墙先于拼接节点发生破坏,在加载过程中对节点具有保护作用;结构的滞回性能良好,其割线刚度没有发生明显退化。有限元分析结果表明:墙体厚度和框架跨度的改变对结构耗能能力均有不同程度的影响,而框架层高的改变对结构耗能能力影响不明显。展开更多
The strength and stiffness contribution of infill masonry is generally ignored in the design, due to the uncertainty in the strength properties of masonry, separation of infill from frame, low tensile strength, brittl...The strength and stiffness contribution of infill masonry is generally ignored in the design, due to the uncertainty in the strength properties of masonry, separation of infill from frame, low tensile strength, brittle characteristics of masonry walls, less out of plane strength and stiffness, etc.. They are considered as nonstructural elements which is reasonable for the frames under gravity loads but it is not true for the frames under seismic loads. Contained masonry as infill in RC （reinforced concrete） frames provides better contact at the interface and a higher out of plane strength and stiffness. Considering the seismic action on the frames which are likely to be subjected to in-plane as well as out of plane shaking, a research work has been carried out by the authors to investigate the seismic performance of RC frames with and without contained masonry infill panels using FE （finite element） computer program （ANSYS-Ver. l 1） and experimentally using the tri-axial shake table to evaluate the methods proposed in IS-1893-2002 to calculate the fundamental natural frequency. The RC frames were designed and detailed as per IS （Indian Standard） specifications such as IS 456-2000, IS 1893-2002 and IS 13920-1993. Based on the experimental and analytical investigations, the contained masonry infill panels significantly affect the seismic load resisting characteristics of the RC frames. The IS 1893-2002 formulation does not predict the values and hence the recommendation needs to be validated with experimental results.展开更多
文摘为研究悬臂梁段拼接节点对带填充墙钢框架的抗震性能影响,进行了一榀1/2缩尺带砌体填充墙的悬臂梁拼接钢框架的拟静力试验,并进行了ANSYS有限元验证及参数分析。对结构的全阶段加载的破坏模式、应变变化、滞回曲线、位移延性、骨架曲线、割线刚度及其退化规律和等效黏滞阻尼比等进行分析。试验结果表明:该结构的承载力为183 k N,极限位移为11 mm,位移延性系数为1.88,具有良好的承载能力和位移延性;填充墙先于拼接节点发生破坏,在加载过程中对节点具有保护作用;结构的滞回性能良好,其割线刚度没有发生明显退化。有限元分析结果表明:墙体厚度和框架跨度的改变对结构耗能能力均有不同程度的影响,而框架层高的改变对结构耗能能力影响不明显。
文摘The strength and stiffness contribution of infill masonry is generally ignored in the design, due to the uncertainty in the strength properties of masonry, separation of infill from frame, low tensile strength, brittle characteristics of masonry walls, less out of plane strength and stiffness, etc.. They are considered as nonstructural elements which is reasonable for the frames under gravity loads but it is not true for the frames under seismic loads. Contained masonry as infill in RC （reinforced concrete） frames provides better contact at the interface and a higher out of plane strength and stiffness. Considering the seismic action on the frames which are likely to be subjected to in-plane as well as out of plane shaking, a research work has been carried out by the authors to investigate the seismic performance of RC frames with and without contained masonry infill panels using FE （finite element） computer program （ANSYS-Ver. l 1） and experimentally using the tri-axial shake table to evaluate the methods proposed in IS-1893-2002 to calculate the fundamental natural frequency. The RC frames were designed and detailed as per IS （Indian Standard） specifications such as IS 456-2000, IS 1893-2002 and IS 13920-1993. Based on the experimental and analytical investigations, the contained masonry infill panels significantly affect the seismic load resisting characteristics of the RC frames. The IS 1893-2002 formulation does not predict the values and hence the recommendation needs to be validated with experimental results.
