外挂模块化节能复合墙板钢框架足尺振动台试验研究
Full-Scale Shaking Table Test of a Steel Frame with External Modular Energy-Saving Composite Walls
外挂模块化节能复合墙板兼具保温隔热效果优良、装配效率高效、综合造价低等优点,十分适用于城市小型装配式变电站的外围护墙体。为探究该类墙板与钢框架连接体系的可靠性,本研究制作了单层足尺钢框架外挂模块化节能复合墙板试件,开展了地震模拟振动台试验,研究试件在不同烈度、不同地震波作用下的加速度、位移等动力响应特性。结果表明:钢框架与模块化节能复合墙板协同工作性能良好,墙板可有效提升结构整体刚度;且该复合墙板试件刚度较大,在地震作用下损伤程度较轻,自振频率降幅较小;随地震峰值加速度A的增大,墙板的加速度放大系数呈下降趋势;在8度多遇地震(A=0.07g)至8度极罕遇地震(A=0.60g)作用下,结构的层间位移角均满足规范限值要求;“上拉下托”连接形式不仅连接可靠,还具备一定耗能能力;试验全过程墙板基本处于弹性状态,未出现明显破坏。
External modular energy-saving composite walls have the advantages of excellent thermal insulation, rapid and efficient assembly construction and cost-effectiveness, making them especially suitable for the external enclosure walls of small urban prefabricated substations. In order to study the reliability of the connection between this type of wall panel and a steel frame, a one-story full-scale structural model of a steel frame with external modular energy-saving composite wall panels was fabricated. A seismic simulation shaking table test was conducted to investigate its dynamic characteristics, including acceleration and displacement responses under different seismic intensities and seismic waves. The results show that the steel frame and modular energy-saving composite wall panels exhibit good cooperative performance, and the wall panels improve the structural stiffness. The model structure has high stiffness, suffers minor damage under seismic loading, and shows a limited reduction in natural frequency. With the increase of A, the acceleration amplification factor of the wall panels shows a downward trend. The inter-story drift ratios of the model under 8-degree frequent earthquakes (A=0.07g) to 8-degree extremely rare earthquakes (A=0.60g) all meet the code limit requirements. The "upper pulling and lower supporting" connection configuration provides reliable connection while dissipating seismic energy. The wall panels remain basically elastic with no obvious damage.
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河北省杰出青年科学基金(E2022210084)
国网河北省电力有限公司科技研发资助项目(HZHTCG2023-07)
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