采空区地震耦合作用下碳纤维加固框架结构振动台试验研究  

Shaking table test study on carbon fiber reinforced frame structure subjected to seismic coupling in goaf

作　　者：刘书贤 王帅 路沙沙 刘少栋 LIU Shuxian;WANG Shuai;LU Shasha;LIU Shaodong(Department of Civil Engineering,Liaoning Technical University,Fuxin 123000,China)

机构地区：[1]辽宁工程技术大学土木工程学院,阜新123000

出　　处：《建筑结构》2021年第11期119-123,118,共6页Building Structure

基　　金：国家自然科学基金(51474045)。

摘　　要：为了探究采空区地震耦合作用下碳纤维加固对框架结构的抗震、抗倾斜能力的影响,设计了三种工况,分别对应框架结构倾斜2,4,6mm/m。基于结构动力学和相似理论,制作了缩尺比为1/10的框架结构模型,并用碳纤维对其梁端和柱端加固。通过对未加固结构和加固结构进行振动台试验,分别对结构的动力特性、地震反应等情况进行对比分析研究。结果表明:碳纤维加固有效地约束了结构的变形,使结构层间位移、层间位移角及顶点位移明显减小,结构的延性得到优化;碳纤维加固提高了结构的整体刚度和抗侧能力,延缓了刚度的退化,提高了结构的抗震、抗倾斜能力。同时,也体现了碳纤维加固的有效性。In order to explore the influence of carbon fiber reinforcement on the anti-seismic and anti-tilt ability of the frame structure under the seismic coupling in goaf, three working conditions were designed, corresponding to the tilt of the frame structure by 2, 4, and 6 mm/m respectively. Based on the structural dynamics and similarity theory, the frame structure model with a scale ratio of 1/10 was made, and carbon fiber was used to strengthen the beam end and the column end. Through the shaking table test of the unreinforced structure and the reinforced structure, the dynamic characteristics and seismic response of the structure were compared and analyzed. The results show that the carbon fiber reinforcement effectively restrains the deformation of the structure, and the inter-layer displacement, inter-layer displacement angle and vertex displacement of the structure are significantly reduced, and the ductility of the structure is optimized. Carbon fiber reinforcement improves the overall stiffness and lateral resistance of the structure, delays the degradation of stiffness, and improves the anti-seismic and anti-tilt ability of the structure. At the same time, it also reflects the effectiveness of carbon fiber reinforcement.

关 键 词：碳纤维加固 框架结构 振动台试验 采空区 抗震 抗倾斜 

分 类 号：TU317.1[建筑科学—结构工程]