索结构外文文献 提高钢筋混凝土框架结构抗震性能的摩擦自定心索支撑.pdf

Engineering Structures 207 (2020)110187 Contents lists available at ScienceDirect ENGINEERING STRUCTURES Engineering Structures ELSEVIER journal homepage:.elsevier./locate/engstruct Self-centering cable brace with friction devices for enhancing seismic performance of RC frame structures Chack for Tong Guo" Jishuai Wang Yongsheng Song Weihong Xuan Yuzhi Chen Key Laboratory of Cancrete and Prestressed Concrete Structures of the Ministry of Education Southeast University Nanjing 210096 PR China ARTICLE INFO ABSTRACT Keywords: A novel self-centering cable brace (SCCB)with friction devices is developed to improve the seismic performance Self-centering of existing RC frame structures.This paper presents the structural configuration and the theoretical load-dis- Cable brace placement relationship of the SCCB.Cyclic loading tests are conducted to show the effectiveness of the SCCB Friction and a numerical model is established and validated based on the test results.A parametric analysis is made to Seismic performance investigate the influence of tendon stiffness and friction on hysteretic performance of the SCCB.Nonlinear dy- Strengthening namic analyses are further carried out on a nine-story RC frame which is seismically deficient and enhanced with buckling restrained braces (BRBs)and SCCBs respectively for parison.Inter-story and residual inter- story drifts base shear forces load-axial elongation relationships and self-centering indexes of the bare and strengthened fram...