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连柱钢框架结构由耗能连梁连接框架结构的毗邻双柱构成,地震作用下连梁首先屈服耗散地震能量,避免或延缓主体结构损伤。为了研究连柱框架结构连梁的可替换性,设计了2组不同结构高跨比、1组不同结构层数和1组不同构件钢材等级的算例。采用有限元分析软件对算例进行Pushover分析,分析不同高跨比、层数和钢材等级对连柱框架结构可替换性的影响。分析结果表明:基于等能量原理的三折线模型适用于确定连柱钢框架结构耗能连梁的替换范围;高跨比系列算例的层间位移角介于1/180 rad至1/45 rad之间时耗能连梁可进行替换;给出了不同层数连柱钢框架结构耗能连梁可替换层间位移角限值的变化规律;采用高强度钢材作为非耗能构件后,耗能连梁可替换层间位移角的范围增大,耗能连梁层间位移角可替换的下限基本不变,上限随钢材强度的提高而增加。
The connecting steel frame structure is composed of two adjacent columns connected by the energy-dissipating beam to the frame structure. Under the earthquake action, the connecting beam firstly yields dissipative seismic energy to avoid or delay damage to the main structure. In order to study the substitutability of the connecting beam with frame-column structure, two groups of steel grades with different span ratios, different structure levels and a group of 1 different components were designed. The finite element analysis software is used to carry out pushover analysis on the examples to analyze the influence of different high span ratio, layer number and steel grade on the replaceability of the frame structure of the connecting column. The analysis results show that the tri-fold line model based on the principle of equal energy is suitable for determining the replacement range of energy-dissipating beams in the steel frame structure of double-column structure. The interlayer displacement angle of the high-span ratio series is between 1/180 rad and 1/45 rad The energy consumption can be replaced by the connecting beam; the changing law of the displacement angle limit of the replaceable layer of the energy-dissipating steel beam with different number of columns is given; after using the high-strength steel as the non-energy-consuming component, the consumption The range of displaceable angle between two beams that can be replaced by beam can be increased, and the lower limit of replaceable displacement angle between two beams can be kept unchanged. The upper limit increases with the strength of steel.