火电厂钢框排架-消能支撑结构低周往复加载试验

发布时间：2018-04-12 10:52

本文选题：框排架 + 防屈曲支撑　；参考：《北京工业大学学报》2017年11期

【摘要】：为研究钢框排架-消能支撑结构的抗震性能,以某钢结构火电厂主厂房为原型并采用防屈曲支撑作为消能装置,设计了1榀5层的钢框排架-消能支撑结构试件.通过低周往复加载试验,分析其破坏机制、滞回性能、刚度退化规律、层间变形及防屈曲支撑耗能能力.试验结果表明:钢框排架-消能支撑结构具有较高的抗侧刚度及承载能力.模型试件滞回曲线呈饱满的梭形,等效黏滞阻尼系数达0.262,位移延性系数超过3.53,表现出良好的耗能及延性性能.试验过程中,防屈曲支撑可在较小加载位移时先于主体梁柱进入屈服且塑性耗能特征明显,增加了结构阻尼且耗能稳定,有效提高了结构抗震性能.
[Abstract]:In order to study the seismic behavior of the steel frame bent-energy dissipation bracing structure, a five-story steel frame bent frame-energy dissipation bracing structure was designed with a steel structure power plant building as the prototype and the anti-buckling support as the energy dissipation device.The failure mechanism, hysteretic performance, stiffness degradation rule, interstory deformation and energy dissipation ability of buckling bracing were analyzed by low cycle reciprocating loading test.The test results show that the steel frame bent-energy dissipation bracing structure has high lateral stiffness and bearing capacity.The hysteretic curve of the model specimen is full fusiform, the equivalent viscous damping coefficient is 0.262, and the displacement ductility coefficient is more than 3.53, showing good energy dissipation and ductility performance.In the test process, buckle-resistant braces can enter yield before the main body Liang Zhu when the load displacement is small, and the plastic energy dissipation characteristic is obvious, which increases the damping and energy dissipation stability of the structure, and effectively improves the seismic performance of the structure.
【作者单位】：北京工业大学工程抗震与结构诊治北京市重点实验室;中冶建筑研究总院有限公司;华北电力设计院工程有限公司;
【基金】：北京市自然科学基金重点资助项目(8141001) 国家自然科学基金资助项目(51378038)
【分类号】：TU317

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