废弃玻璃混凝土梁柱节点性能的有限元分析

发布时间：2019-05-13 21:03

【摘要】：废弃玻璃混凝土是指将回收的废弃玻璃经过人工的淘洗、烘干、碾碎后进行筛选,按一定级配替代普通混凝土中的细骨料天然河砂制备而成的废弃玻璃混凝土。废弃玻璃混凝土作为废弃垃圾回收再利用的一种手段,具有很重要的现实意义。作为一种新型的绿色环保的建筑材料,既可以节约天然骨料资源,又可以缓解自然资源供需矛盾的现状,增强环境保护力度,减轻废弃垃圾对城市及周边环境的污染。目前,废弃玻璃混凝土的应用越来越广泛,但废弃玻璃混凝土梁柱节点的研究还较少。本课题利用大型通用有限元软件ABAQUS,建立了废弃玻璃混凝土梁柱十字节点的模型。在梁端施加单调荷载、低周反复荷载的情况下,对节点的受力性能进行了分析。在单调荷载作用下,对比废弃玻璃混凝土与普通混凝土梁柱节点的应力云纹图、荷载-位移曲线等,观察它们的受力特性、破坏模态。在低周反复荷载作用下,通过改变参数,参数包括废弃玻璃替代率、节点配箍率、轴压比、小偏心受压等,建立了18个废弃玻璃混凝土梁柱节点构件的模型,得到了节点中截面的纵向应力分布、钢筋的应力分布,观察了它们的受力情况、破坏形态。单一参数不同时,通过对比节点构件的滞回曲线、骨架曲线、延性系数、刚度退化、强度退化等来分析废弃玻璃混凝土梁柱节点在低周反复荷载作用下的抗震性能。
[Abstract]:Waste glass concrete refers to the waste glass concrete which is prepared by artificial washing, drying, crushing and screening, and replacing the fine aggregate natural river sand in ordinary concrete according to a certain grade. As a means of recycling waste, waste glass concrete has very important practical significance. As a new type of green environmental protection building material, it can not only save natural aggregate resources, but also alleviate the contradiction between supply and demand of natural resources, strengthen environmental protection, and reduce the pollution of waste to the city and its surrounding environment. At present, the application of waste glass concrete is more and more extensive, but the research of Liang Zhu joint of waste glass concrete is still less. In this paper, the model of Liang Zhu cross joint of waste glass concrete is established by using the large-scale general finite element software ABAQUS,. Under the condition of monotone load and low cyclic load at the end of the beam, the mechanical properties of the joint are analyzed. Under monotone load, the stress moire pattern and load-displacement curve of Liang Zhu joint between waste glass concrete and ordinary concrete are compared, and their stress characteristics and failure modes are observed. Under the action of low cycle cyclic load, the models of 18 waste glass concrete Liang Zhu joint members are established by changing the parameters, including waste glass replacement rate, joint hoop ratio, axial compression ratio, small eccentric compression and so on. The longitudinal stress distribution of the section of the joint and the stress distribution of the steel bar are obtained, and their stress and failure form are observed. When the single parameter is different, the seismic performance of waste glass concrete Liang Zhu joint under low cyclic loading is analyzed by comparing the hysteretic curve, skeleton curve, ductile coefficient, stiffness degradation and strength degradation of the joint members.
【学位授予单位】：沈阳建筑大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU37

【相似文献】