自保温暗骨架承重墙抗震性能试验研究与分析

SEISMIC EXPERIMENT AND THEORETICAL ANALYSIS ON SELF-INSULATING STRUCTURAL WALLS WITH INNER SKELETON

  • 摘要: 从抗震节能一体化出发,研发了自保温暗骨架承重墙及其结构体系。通过水平低周反复荷载试验研究了自保温暗骨架承重墙的抗震性能,揭示了该新型抗震墙体受力机制的转化过程,即抗震失效全过程可分为共同工作、转化过渡和弱框架工作三个阶段。结合试验成果开展理论分析,针对自保温暗骨架承重墙剪切破坏模式,分别建立了基于等效弹性板模型的墙体开裂荷载计算方法和基于修正软化拉压杆模型的墙体抗剪极限承载力计算方法,与实测值相比误差分别是3.2%、3.3%,故构建的理论计算方法精度高、物理力学概念清晰。结果表明:自保温暗骨架承重墙具有多道抗震防线,抗震性能好,加之施工方便快捷、造价低廉,特别适宜在村镇住宅等多层建筑中推广应用。

     

    Abstract: A self-insulating structural wall with inner skeleton and its structural system were designed for realizing the integration of anti-seismic and energy-saving performance. A horizontal low-cyclic load test was conducted to investigate the wall's seismic performance, and it revealed the transformation process of the wall's failure mechanisms. Accordingly, the failure process was divided into three stages, including common working stage, transition stage and weak frame working stage. This study proposed cracking load and ultimate capacity formulas based on the wall's final failure mode and theoretical analysis of the test results. The two formulas were respectively established on the basis of the elastic equivalent model and the modified softened strut-and-tie model. The relative errors between theoretical analysis and test results were 3.2% and 3.3%, respectively, indicating the theoretical formulas have a clear physical significance and an adequate level of accuracy. Additionally, the experiment results verified the wall's superiorities, including seismic behavior, construction convenience and economic performance. The wall is well-suitable for application in multi-story residential buildings such as villages and towns.

     

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