圆竹—轻质砂浆组合墙体力学性能的试验研究

发布时间：2018-04-17 02:04

本文选题：圆竹 + 竹结构　；参考：《西安建筑科技大学》2014年硕士论文

【摘要】：竹子是我国重要的森林资源之一，我国是世界上竹类分布最广、资源最多、利用最早的国家之一，与钢材、水泥和砖等传统建筑材料相比，竹材来源广泛，生长周期短；物理性能良好，材质强度高、韧性好；绿色有机材料，不仅能具有改善自然环境的作用，而且具有加工过程中能耗低，废弃后可自然降解的优点。因此，合理的开发竹材资源，将竹材这一绿色有机材料作为主要的结构材料应用于建筑结构，形成新型结构体系，对提高竹材的利用价值，在一定程度上取代传统的结构材料，提高建筑的绿色化程度，实现建筑行业的可持续发展具有重要的意义。但现阶段的国内外研究主要集中在单根构件及节点受力性能上，本文对圆竹—轻质物料组合墙体进行了初步的研究，并得出结论：（1）本文对竹材力学性能进行试验研究，确定竹材的顺纹抗拉强度、顺纹抗压强度，研究不同试样形式的破坏机理及竹节对竹材力学性能的影响。试验表明，竹材具有较高的力学强度，是天然的绿色建材，竹节对竹材的力学性能有较大影响。（2）本文就圆竹与轻质砂浆的共同工作性能进行了粘结滑移试验，研究圆竹与轻质砂浆粘结滑移性能的影响因素，对圆竹与轻质砂浆两者协同工作的性能进行评价。结果表明，圆竹的埋置深度、表面形式及圆竹直径对粘结强度都有较大影响。（3）本文对圆竹—轻质砂浆组合墙体在低周往复荷载作用的抗剪性能进行试验研究，研究组合墙体承受往复荷载的破坏模式，组合墙体中轻质砂浆与圆竹共同工作的受力机理；获取组合墙体在水平低周往复荷载情况下的滞回曲线，通过组合墙体的初始刚度、承载能力、延性、刚度退化等参数，研究该结构的抗侧性能；试验结果表明，圆竹—轻质物料组合墙体具有较高的抗剪强度、初始侧向刚度、良好的能量耗散能力及稳定的滞回性能，虽然初期刚度退化严重，但加载后期刚度退化平缓，具有较好的延性。本文研究了竹材力学性能、圆竹和轻质砂浆的粘结滑移性能及圆竹—轻质砂浆组合墙体的抗剪性能，，为该结构的研究进行了初步的探索，并对该结构体系的研究打下基础，对竹结构的研究提出新的研究方向。
[Abstract]:Bamboo is one of the most important forest resources in China. Bamboo is the most widely distributed and resource in the world. Compared with traditional building materials such as steel, cement and brick, bamboo has a wide source and short growth period.Green organic materials can not only improve the natural environment, but also have the advantages of low energy consumption and natural degradation after waste.Therefore, it is reasonable to develop bamboo resources, take bamboo as the main structural material, form a new structure system, improve the utilization value of bamboo, and replace the traditional structural material to some extent.It is of great significance to improve the green degree of architecture and realize the sustainable development of construction industry.However, at present, the research at home and abroad is mainly focused on the mechanical performance of single member and joint. This paper makes a preliminary study on the composite wall of circular bamboo and light weight material, and draws a conclusion:1) the mechanical properties of bamboo were studied in this paper. The tensile strength and compressive strength of bamboo were determined, and the failure mechanism of different specimen forms and the influence of bamboo segments on the mechanical properties of bamboo were studied.The results show that bamboo has high mechanical strength and is a natural green building material, and bamboo section has great influence on the mechanical properties of bamboo.In this paper, the bond-slip test of circular bamboo and lightweight mortar is carried out, the factors influencing the bond-slip property of circular bamboo and light mortar are studied, and the performance of circular bamboo and light mortar working together is evaluated.The results showed that the embedded depth, surface form and diameter of circular bamboo had great influence on the bond strength.In this paper, the shear behavior of circular bamboo-lightweight mortar composite wall under low cycle reciprocating load is studied, and the failure mode of composite wall subjected to reciprocating load is studied, and the mechanism of working together of lightweight mortar and circular bamboo in composite wall is studied.The hysteretic curve of composite wall under horizontal low cycle reciprocating load is obtained. The anti-lateral performance of the composite wall is studied by the parameters of initial stiffness, bearing capacity, ductility and stiffness degradation.The composite wall has high shear strength, initial lateral stiffness, good energy dissipation ability and stable hysteretic performance. Although the initial stiffness degradation is serious, the stiffness degradation in the later loading stage is gentle and has good ductility.In this paper, the mechanical properties of bamboo, the bond-slip properties of circular bamboo and lightweight mortar and the shear resistance of circular bamboo-light mortar composite wall are studied, which is a preliminary exploration for the study of the structure, and lays a foundation for the study of the structure system.A new research direction of bamboo structure was put forward.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU398

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