摘要
在工程实践中,已建RC框架所在地区由于设防烈度提高,需要重新设计加固,以保证抗侧刚度满足要求。基于这种情况,提出Y型偏心钢支撑加固RC框架的简化设计方法,为类似工程的抗震加固提供设计依据。应用SAP2000有限元分析软件,建立原RC框架与加固后RC框架的模型,进行非线性动力时程分析。结果得出,加固后的RC框架自振周期、顶层位移、各层位移与层间位移均减小,基底剪力增大;但剪重比仍满足规范要求,加固方法经济合理。
Because of the exaltation of seismic fortification intensity, some constructions need reinforcement to ensure the lateral stiffness to meet requirements. Based on this premise, this paper developed the specific design of Y-eccentrically steel brace reinforced in RC frames. This method can provide the basis for the seismic rein- forcement of similar projects. The RC frame modal and Y-eccentrically braced frame modal were built using the SAP2000 finite element software, which was used to carry on the nonlinear analysis. The results showed that the factors such as vibration period, top-level displacement, base shear were reduced after the RC frames were reinforced, but the shear increased of the base, the shear-weight ratio still met the requirements and the reinforced frames were rational economically.
出处
《苏州科技学院学报（工程技术版）》
CAS
2014年第2期42-46,共5页
Journal of Suzhou University of Science and Technology （Engineering and Technology）
关键词
Y型偏心支撑
抗侧刚度
耗能梁段
斜撑
时程分析
Y-eccentrically steel brace
lateral stiffness
link beam
diagonal brace
time-history analysis
