轻钢灌浆墙体抗震性能试验与设计方法研究

发布时间：2018-05-19 07:26

本文选题：轻钢灌浆墙 + 装配式建筑　；参考：《北京交通大学》2017年硕士论文

【摘要】：轻钢灌浆墙结构体系是一种新型装配式建筑结构体系,具有抗震优良、节能环保、施工快速、经济实用、防火防腐、隔音、保温隔热一体化等特点。本文以试验为基础,利用ABAQUS建立轻钢灌浆墙体有限元模型,对墙体抗震性能及抗剪承载力影响因素进行了分析。结合试验结果和有限元模拟,对墙体设计方法进行研究,为轻钢灌浆墙体技术规程的编制及推广应用提供科学依据。本文主要完成的工作及成果如下:(1)进行了 5片1:1轻钢灌浆墙体的低周往复加载试验,分析总结了墙体的破坏模式、滞回性能、抗剪承载能力、延性性能、耗能能力和刚度退化等规律。试验结果表明:灌浆墙体在层间位移角1/300左右时屈服,极限层间位移角达到1/50。灌浆墙体的抗剪承载力为空框架墙体的3.3倍,初始抗侧刚度为空框架墙体的4倍,累积耗能为空框架墙体的2.4倍;有蒙皮灌浆墙体抗剪承载力比无蒙皮灌浆墙体提高43%,内外墙面板能抑制聚苯颗粒泡沫混凝土开裂;高宽比为1.5的墙体单位宽度抗剪承载力比高宽比为1的墙体降低27%,高宽比越大,刚度退化越显著。轻钢灌浆墙体主要通过钢材屈服后的弹塑性变形和材料的破坏来实现耗能,试验墙体的延性系数较大,具有良好的变形与耗能能力。(2)采用Abaqus软件对单调荷载作用下的轻钢灌浆墙体进行模拟,将试验墙体破坏特征、荷载-位移曲线和最大抗剪承载力与有限元分析结果进行对比分析,二者吻合较好。在试验结果基础上,利用有限元方法对墙体抗剪承载力影响因素进行了分析。结果表明:填充材料和钢材厚度对墙体抗剪承载力影响最大;内外墙板、斜支撑和高宽比对墙体抗剪承载力影响次之;横龙骨、外挂板种类和竖向荷载对墙体抗剪承载力影响不大。(3)结合试验结果和有限元分析,对轻钢灌浆墙体设计方法进行了研究。提出了轻钢灌浆墙体抗侧刚度计算公式和抗剪承载力计算公式,计算结果与试验吻合较好。对墙体的构造提出优化建议,为轻钢灌浆墙结构的后续研究及工程应用提供依据。
[Abstract]:Light steel grouting wall structure system is a new type of prefabricated building structure system, which has the characteristics of good seismic resistance, energy saving and environmental protection, fast construction, economic and practical, anti-fire and anticorrosion, sound insulation, heat insulation and so on. Based on the experiment, the finite element model of lightweight steel grouting wall is established by ABAQUS, and the factors affecting the seismic performance and shear bearing capacity of the wall are analyzed. Combined with the test results and finite element simulation, the design method of the wall is studied, which provides a scientific basis for the compilation and popularization of the technical specification for the grouting wall in light steel. The main work and results of this paper are as follows: (1) the low cycle reciprocating loading tests of 5 1:1 light steel grouting walls are carried out, and the failure modes, hysteretic properties, shear bearing capacity, ductility of the walls are analyzed and summarized. Energy dissipation capacity and stiffness degradation. The experimental results show that when the interstory displacement angle is about 1 / 300, the ultimate interstory displacement angle reaches 1 / 50. The shear capacity of grouting wall is 3.3 times of that of hollow frame wall, the initial lateral stiffness is 4 times of that of empty frame wall, and the cumulative energy consumption is 2.4 times of that of empty frame wall. The shearing capacity of the thinned grouting wall is 43% higher than that of the non-skinned grouting wall, and the inner and outer wall panel can restrain the cracking of polystyrene granular foam concrete. The shear bearing capacity per unit width of the wall with a aspect ratio of 1.5 is reduced by 27 times than that of the wall with a aspect ratio of 1. The larger the aspect ratio is, the more the stiffness degenerates. The light steel grouting wall can consume energy mainly through the elastoplastic deformation and material failure after the steel yield, and the ductility coefficient of the test wall is large. Abaqus software is used to simulate the lightweight steel grouting wall under monotonic load, and the failure characteristics of the test wall are analyzed. The results of the load-displacement curve and the maximum shear capacity are compared with those of the finite element analysis, and the results are in good agreement with each other. Based on the experimental results, the factors affecting the shear capacity of the wall are analyzed by finite element method. The results show that the thickness of filling material and steel has the greatest influence on the shear bearing capacity of the wall, the external wall plate, oblique brace and the ratio of height to width have the second influence on the shear bearing capacity of the wall. Combined with test results and finite element analysis, the design method of lightweight steel grouting wall was studied. The formulas of lateral stiffness and shear bearing capacity of lightweight steel grouting wall are presented. The calculated results are in good agreement with the test results. Suggestions for optimization of wall structure are put forward, which provide basis for follow-up study and engineering application of light steel grouting wall structure.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU352.11

【参考文献】