阻尼填充墙加固震损框架平面内性能研究

发布时间：2018-05-26 02:12

本文选题：震损框架加固 + 砌体阻尼填充墙　；参考：《广州大学》2017年硕士论文

【摘要】：钢筋混凝土框架结构在历次地震中经常出现墙体大量破坏或倒塌,而框架本身却损伤较小的情况;传统修复加固措施往往施工过程复杂,且加固后框架传力机制受到改变,框架的约束效应提升;针对以上问题,本文提出阻尼填充墙加固震损框架的方法,研究了阻尼填充墙加固震损框架的构造措施,对其进行了平面内受力性能试验,建立了有限元分析模型并在此基础上进行了参数分析,主要的工作及结论如下:(1)提出了阻尼填充墙加固震损框架的方法,对震损框架的鉴定及评估进行了说明,明确震损框架的相应修复措施;提出了砌体阻尼填充墙加固震损框架以及减震墙板加固震损框架两种加固方案,并对其施工流程进行解析。(2)设计制作了空框架(Bared frame)、震损修复框架(Carbon-fiber repaired bared frame)、砌体阻尼填充墙加固震损框架(Carbon-fiber repaired frame with damped infill wall reinforced)和砌体阻尼填充墙框架(Damped infill wall frame)并对其进行低周反复加载试验,试验结果表明:使用CFRP等方法修复后的震损框架可以达到未震损全新空框架的水平;砌体阻尼填充墙加固震损框架可以提高加固后构件平面内抗震性能,并使其按预定机理进行工作;使用砌体阻尼填充墙加固后的构件可以达到全新的砌体阻尼填充墙框架的效果,加固效果良好。(3)设计制作了修复震损框架(Repaired bare frame)、普通预制墙板加固震损框架(Common wallboard reinforced frame)以及减震墙板加固震损框架(Damped wallboard reinforced frame)三个试件并对其进行低周反复加载试验,试验结果表明:减震墙板加固震损框架可以提高加固后构件的承载力以及延性等平面内抗震性能,且该加固方式保证了墙体单元一体性的完好;使用普通预制墙板加固震损框架可以提高框架整体的抗震能力,但墙体单元的破坏程度较严重;而使用减震墙板加固震损框架不仅加固效果优于普通预制墙板加固震损框架,对墙体单元的保护程度也较好。(4)运用有限元软件Abaqus进行了有限元分析,对减震墙板加固震损框架进行了有限元建模,并对其有限元模拟结果进行了详细分析,对平面内荷载作用下减震墙板墙体单元、震损框架、以及墙板拉结纵筋的破坏模式以及变形特点进行了研究;根据建立的有限元模型分析了阻尼层剪切强度、高厚比以及轴压比三个参数对减震墙板加固震损框架平面内性能的影响及其规律,得出如下结论:减震墙板加固震损框架的建模方法具有合理性且与试验结果较为吻合;减震墙板加固震损框架在具有显著的减震效果的同时还改善了普通加固方式的传力机制,避免了墙板对框架的约束效应的影响;阻尼层剪切强度的增加,可提高构件整体的承载力与刚度;较小的高厚比可以增加构件整体耗能能力;轴压比的变化对减震墙板本身的承载力、刚度与变形影响不显著,且当轴压比超过0.60会削弱构件的承载力,产生不利影响。
[Abstract]:The reinforced concrete frame structure is often damaged or collapsed during the earthquake, but the frame itself has little damage. The traditional repair and reinforcement measures are often complicated, and the force mechanism of the frame is changed after reinforcement, and the constraint effect of the frame is improved. In this paper, the damping filling wall reinforcement is proposed in this paper. In the method of earthquake damage frame, this paper studies the structural measures of the damped frame for the damping filled wall, carries out the in-plane stress test, establishes the finite element analysis model and analyzes the parameters on this basis. The main work and conclusion are as follows: (1) the method of strengthening the earthquake damage frame of the barrier filled wall is put forward, and the frame of the earthquake damage is put forward. The appraisal and evaluation are explained, the corresponding repair measures of the earthquake damage frame are clearly defined, two reinforcement schemes for the masonry damped wall reinforcement frame and the earthquake damage frame are proposed, and the construction process is analyzed. (2) the Bared frame (Carbon-fiber repaired bared FRA) is designed and made. Me), the masonry damped wall reinforced wall reinforced frame (Carbon-fiber repaired frame with damped infill wall reinforced) and masonry damping filled wall frame (Damped infill wall) were used for low cycle repeated loading test. The frame of the masonry damping filling wall strengthening the earthquake damage frame can improve the seismic performance in the plane and make it work according to the predetermined mechanism, and the structure after reinforcement with the masonry damping filling wall can achieve the effect of the new masonry damping filling wall frame, and the reinforcement effect is good. (3) the frame of repairing the earthquake damage is designed and made (Re Paired bare frame), the earthquake damage frame (Common wallboard reinforced frame) and the earthquake damage frame (Damped wallboard reinforced frame) are three specimens strengthened by the ordinary prefabricated wall panels and the low cycle repeated loading tests are carried out. The results show that the earthquake damage frame of the shock absorbing wall plate can improve the bearing capacity of the reinforced component. The seismic performance of the plane, such as force and ductility, ensures the integrity of the wall unit, and the earthquake damage frame of the frame can be improved by using the common prefabricated wall plate, but the damage degree of the wall unit is more serious, and the reinforcement effect is not only better than the ordinary precast wall using the shock absorbing wall plate. The protection degree of the earthquake damage frame is also better. (4) the finite element analysis is carried out by the finite element software Abaqus. The finite element modeling of the earthquake damage frame is carried out, and the finite element simulation results are analyzed in detail, and the frame of the shock absorber wall wall under the load of the plane, the frame of the earthquake damage, and the frame of the earthquake damage are also carried out. The failure mode and deformation characteristics of the longitudinal reinforcement of the wallboard are studied. According to the established finite element model, the influence and the law of the three parameters of the damping layer shear strength, the high thickness ratio and the axial compression ratio on the internal performance of the earthquake damage frame are analyzed, and the following conclusion is drawn: the modeling method of the earthquake damage frame for the damping wall plate reinforcement It is reasonable and consistent with the test results; the shock absorbing frame has significant damping effect, while also improving the force transmission mechanism of the common reinforcement method, avoiding the effect of the wall plate on the frame effect; the increase of the shear strength of the damping layer can lift the bearing capacity and stiffness of the high component and the smaller high thickness. It can increase the overall energy dissipation capacity of the component, and the change of axial pressure ratio has no significant influence on the bearing capacity, stiffness and deformation of the damping wall plate itself, and the bearing capacity of the axial compression ratio over 0.60 will weaken the bearing capacity of the component, and has a negative effect.
【学位授予单位】：广州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU352.1

【参考文献】