Y形偏心支撑高强钢框架结构抗震性能

摘要

在Y形偏心支撑高强钢框架结构抗震性振动台试验的基础上，建立了试验试件的有限元模型，并验证了分析的正确性。设计了一个9层的Y形偏心支撑高强钢框架结构，以耗能梁段长度、耗能梁段腹板高厚比、高跨比为参数，对9层结构进行了非线性动力时程分析，研究了以上参数对结构抗震性能的影响。研究结果表明，改变耗能梁段长度、高跨比对结构层间侧移、耗能梁段性能、框架柱弯矩、耗能能力均有不同程度的影响，对框架柱轴力、基底剪力无显著影响；改变耗能梁段腹板高厚比对结构耗能能力有影响，对结构层间侧移、耗能梁段性能、框架柱受力、基底剪力无显著影响，并给出了相关设计建议。%The finite element models of test specimen were established after the shake table test of high strength steel frames with Y-type eccentrically braces (Y-HSS-EBF).A 9-story Y-HSS-EBF structure was designed and nonlinear time history analysis were conducted to study the influence of link length,link web ratio of height to thickness and ratio of depth to span to seismic performance of 9-story Y-HSS-EBFs. Results indicated that different link length and ratio of depth to span had different influence to the interstory displacement,seismic performance of link,column moment and energy dissipation capacity,but slight influence to column axial force and base shear force.Different link web ratio of height to thickness had different influence to energy dissipation capacity,but slight influence to interstory displacement, seismic performance of link,column force and base shear force.Finally,some recommendations for engineering design were given based on the analysis.