【摘要】 带可替换耗能梁段的偏心支撑钢框架震后定损迅速、修缮成本低而备受研究者青睐，目前耗能连接件选材主要选用钢材，应变硬化较为严重。传统钢制耗能连接件受剪时应变硬化严重，铝合金较于钢材其屈服点较低，受应变硬化影响不显著，故而提出铝合金可替换剪切连接件偏心支撑钢框架。为探究铝合金可替换剪切连接件偏心支撑钢框架的抗震性能，以铝合金可替换连接件的长度、腹板高厚比、加劲肋间距及铝合金材料为参数建立了12榀有限元模型，采用循环加载的方法对其进行模拟研究。结果表明：铝合金可替换剪切连接件偏心支撑钢框架的滞回曲线饱满，耗能能力良好，塑性转角最小为0.143 rad,满足对于耗能梁段极限塑性转角大于0.08 rad的限值要求，具有良好的抗震能力。更多还原

【Abstract】 Eccentric support steel frame with replaceable energy-consuming beam segments is favored by researchers for its rapid damage determination and low repair cost after an earthquake, but the current energy-consuming connectors are mainly made of steel, which has more serious strain hardening. Traditional steel energy consuming connectors are subjected to severe strain hardening in shear, while aluminum alloy has a lower yield point than steel and is not significantly affected by strain hardening, so it was proposed that aluminum alloy could be used to replace the shear connectors of the eccentric support steel frame. In order to investigate the seismic performance of the eccentric braced steel frame with aluminum alloy replaceable shear connectors, a 12-bay finite element model was established with the parameters of the length of the aluminum alloy replaceable connectors, the web height-to-thickness ratio, the spacing of the stiffening ribs and the aluminum alloy, and a simulation study was carried out using the cyclic loading method. The results show that the hysteresis curve of the aluminum alloy eccentric braced steel frame with aluminum alloy replaceable shear connectors is full, and it has good energy dissipation capacity. The minimum plastic angle of 0.143 rad meets the limit value of 0.08 rad for the ultimate plastic angle of energy-consuming beam segments, and has good seismic capacity.更多还原