使用环形钢板消能器的装配式钢框架外挂墙板体系抗震性能分析

Seismic performance of ring-shaped energy-dissipating devices for prefabricated steel frame structure with external wall panel

为优化外挂墙板装配式钢框架体系的抗震性能,设计了一种环形钢板消能器,对采用该消能器作为节点的钢框架-外挂墙板体系进行低周往复加载有限元分析。结果表明:消能器作为钢框架-外挂墙板体系的外挂节点时,能显著提高体系的受力性能及耗能能力,体系耗能值相比空框架增加了20%~44%,且消能器的厚度越大,体系的耗能值越大,耗能能力越强,但墙板的受压破坏情况越严重,因此合理控制消能器的厚度是非常重要的;选择厚度为8mm的长圆孔消能器作为外挂节点,既可保证结构整体的耗能能力,螺栓在长圆孔中的滑移作用也可减轻墙板的受压破坏,且消能器在墙板压坏之前进入塑性屈服阶段,可实现保护墙板的预期效果,因此消能器的最优厚度是8mm。

In order to optimize the hysteresis performance of the prefabricated steel frame structure with external wall panel(steel frame-wall), a kind of Ring-Shaped Energy-Dissipating device(RSED)was designed. The results show that the energy dissipation capacity of the steel frame-wall system has significantly improved by using RSED as joints. The energy dissipation value of the system has increased by 20%~44%. It is suggested that the device with slotted hole and a thickness of 8 mm could performs well in energy dissipation capacity,and the damage of the wall panel could also be relieved owing to the sliding effect of the bolt in slotted hole. What’s more, the RSED reaches the plastic yield stage before the wall panel is crushed, so as to protect the wall panel as expected.