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对钢管砼短柱进行了伪静力试验研究,由此确立了短柱支座的恢复力模型。其恢复力模型曲线丰满、呈仿锤型、不出现下降段。滞回性能与钢材相近。在此基础上,利用钢管砼隔震支座对一幢四层砖混房屋模型进行了地震模拟振动台试验。试验结果表明,钢管砼短柱具有良好的隔震性能,施工方便、操作简单、容易推广,是一种新型的隔震支座。
A pseudo-static test study was conducted on a short column of steel pipe and a short-pillar column, and the restoring force model of the short column support was established. Its restoring force model curve is full, imitation hammer type, no falling segment appears. Hysteretic properties are similar to those of steel. On this basis, a seismic simulation shaking table test was conducted on a four-story brick-concrete building model using a steel-pipe concrete-seismic bearing. The test results show that the steel-concrete short columns have good seismic isolation performance, convenient construction, simple operation and easy popularization. It is a new kind of seismic isolation bearing.