结构胶增强砖石砌块墙抗剪性能试验研究与分析
发布时间：2018-08-22 09:13
【摘要】：自古以来,我国的砖石建筑分布广泛,在建筑风格上独具特色。砖石建筑不仅体现着中国建筑技术的精湛,也体现着我国古代文化的博大精深。砖石砌体是以砂浆作为粘结材料,将砖石块材按一定的砌筑方式粘结为一体,砖石砌体是一种很不均匀的网状结构体系。砖石砌体中许多灰缝存有大量的原始孔隙和孔洞,致使灰缝的砂浆饱满度低,再加上当时的砌筑砂浆强度低、施工质量差,从而明显的降低了砖石砌体的抗剪性能。现役砖石建筑多以传统民居为主,由于砖石传统民居建造技术与材料的使用、风雨侵蚀及地震破坏,我国现存砖石传统民居都存在不同程度的损伤,需要进行加固,以便抵抗未来可能面临的地震作用。迄今为止,国内采用水泥砂浆面层、外加约束构件及灌浆加固等方法对砖石民居进行加固,但是水泥砂浆面层和外加约束构件加固法会损害砖石传统民居的原有建筑风格。本文采用建筑结构胶作为加固材料,在灌浆加固理论的基础上,以结构胶为注胶材料对砖石砌块砌体进行钻孔注胶加固。建筑结构胶作为一种建筑胶黏剂,应用于承重结构构件的粘结,在使用过程中结构胶能承受设计应力和环境作用。本试验使用环氧树脂结构胶和硅酮结构胶作为注胶材料,研究结构胶对砖石砌块砌体的加固作用。本文运用试验研究、理论分析和数值分析相结合的研究方法,遵循由砌块砌体抗剪性能研究到砖石砌块墙抗剪能力深入分析的研究思路,以物理试验成果为基础,数值分析为补充,开展砖石砌块墙抗剪性能研究工作。在本文中,介绍了对砌块砌体灰缝注胶的方法;分析注胶砌块砌体抗剪的破坏机理、破坏荷载、破坏形态;建立计算注胶砌块砌体的复合强度公式,通过复合强度计算注胶砌块砌体的抗剪强度。同时,应用有限元软件ABAQUS,对在压-剪受力状态下的砖石砌块墙进行研究,通过数值模拟,对普通砖石砌块墙和灰缝注入环氧树脂结构胶砖石砌块墙进行有限元分析,得到了两组墙体的滞回曲线、骨架曲线。通过结构胶加固砖石砌块砌体的试验与理论分析表明,环氧树脂结构胶提高了砖石砌块砌体的抗剪强度。硅酮结构胶提高了砖石砌块砌体的破坏位移。对普通砖石墙体和注胶砖石墙体进行低周反复荷载有限元分析表明,注胶墙体滞回曲线光滑饱满,比普通墙体的消耗能力得到了提升。采用结构胶作为注胶材料对砖石砌体进行加固,效果明显,方便可行。
[Abstract]:Since ancient times, masonry buildings in our country are widely distributed and have unique architectural style. Masonry architecture not only embodies the consummate Chinese architectural technology, but also embodies the profound and profound ancient Chinese culture. Masonry is made of mortar as the bond material and masonry block as a whole according to a certain way of masonry. Masonry is a very uneven network structure system. There are a lot of original pores and holes in many ash joints in masonry, which results in low ploughness of mortar, and low strength and poor construction quality of masonry mortar at that time, which obviously reduces the shear resistance of masonry. The active masonry buildings are mostly traditional residential buildings. Due to the use of construction technology and materials, wind and rain erosion and earthquake damage, the existing traditional masonry houses in our country are damaged to varying degrees and need to be strengthened. In order to resist possible future earthquake action. Up to now, the cement mortar surface layer, the additional restrained member and the grouting reinforcement method have been used to reinforce the masonry residence, but the cement mortar surface layer and the additional restrained member reinforcement method will damage the original architectural style of the traditional brick and stone residence. In this paper, building structural glue is used as reinforcement material, on the basis of grouting reinforcement theory, structural glue is used as glue injection material to reinforce masonry with borehole injection. As a kind of building adhesive, building structural adhesive is applied to the bonding of load-bearing structural members. In the process of application, the structural adhesive can withstand the design stress and environmental action. In this experiment, epoxy resin structural adhesive and silicone structural adhesive were used as injection materials to study the reinforcement effect of structural adhesive on masonry. In this paper, the experimental research, theoretical analysis and numerical analysis are used to study the shearing ability of masonry walls, which is based on the results of physical tests, according to the research ideas of the shear resistance of masonry walls to the in-depth analysis of the shear capacity of masonry walls. Numerical analysis was carried out to study the shear behavior of masonry wall. In this paper, the method of glue injection on cement joint of block masonry is introduced, the failure mechanism, failure load and failure form of mortar masonry are analyzed, and the formula of composite strength is established. The shear strength of concrete block masonry is calculated by composite strength. At the same time, the finite element software Abaqus is used to study the masonry wall under compression and shear stress. Through the numerical simulation, the finite element analysis of the ordinary masonry wall and the mortar seams injected with epoxy resin structure masonry wall is carried out. The hysteretic curve and skeleton curve of two groups of walls are obtained. The experimental results and theoretical analysis of masonry strengthened with structural adhesive show that epoxy resin structural adhesive can improve the shear strength of masonry. Silicone structural adhesive increases the damage displacement of masonry. The low cycle repeated load finite element analysis of ordinary masonry wall and plastic masonry wall shows that the hysteretic curve of plastic injection wall is smooth and full, and the consumption capacity is improved compared with that of ordinary masonry wall. The masonry is reinforced with structural glue as glue injection material, which has obvious effect and is convenient and feasible.
【学位授予单位】：山东农业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU364
[Abstract]:Since ancient times, masonry buildings in our country are widely distributed and have unique architectural style. Masonry architecture not only embodies the consummate Chinese architectural technology, but also embodies the profound and profound ancient Chinese culture. Masonry is made of mortar as the bond material and masonry block as a whole according to a certain way of masonry. Masonry is a very uneven network structure system. There are a lot of original pores and holes in many ash joints in masonry, which results in low ploughness of mortar, and low strength and poor construction quality of masonry mortar at that time, which obviously reduces the shear resistance of masonry. The active masonry buildings are mostly traditional residential buildings. Due to the use of construction technology and materials, wind and rain erosion and earthquake damage, the existing traditional masonry houses in our country are damaged to varying degrees and need to be strengthened. In order to resist possible future earthquake action. Up to now, the cement mortar surface layer, the additional restrained member and the grouting reinforcement method have been used to reinforce the masonry residence, but the cement mortar surface layer and the additional restrained member reinforcement method will damage the original architectural style of the traditional brick and stone residence. In this paper, building structural glue is used as reinforcement material, on the basis of grouting reinforcement theory, structural glue is used as glue injection material to reinforce masonry with borehole injection. As a kind of building adhesive, building structural adhesive is applied to the bonding of load-bearing structural members. In the process of application, the structural adhesive can withstand the design stress and environmental action. In this experiment, epoxy resin structural adhesive and silicone structural adhesive were used as injection materials to study the reinforcement effect of structural adhesive on masonry. In this paper, the experimental research, theoretical analysis and numerical analysis are used to study the shearing ability of masonry walls, which is based on the results of physical tests, according to the research ideas of the shear resistance of masonry walls to the in-depth analysis of the shear capacity of masonry walls. Numerical analysis was carried out to study the shear behavior of masonry wall. In this paper, the method of glue injection on cement joint of block masonry is introduced, the failure mechanism, failure load and failure form of mortar masonry are analyzed, and the formula of composite strength is established. The shear strength of concrete block masonry is calculated by composite strength. At the same time, the finite element software Abaqus is used to study the masonry wall under compression and shear stress. Through the numerical simulation, the finite element analysis of the ordinary masonry wall and the mortar seams injected with epoxy resin structure masonry wall is carried out. The hysteretic curve and skeleton curve of two groups of walls are obtained. The experimental results and theoretical analysis of masonry strengthened with structural adhesive show that epoxy resin structural adhesive can improve the shear strength of masonry. Silicone structural adhesive increases the damage displacement of masonry. The low cycle repeated load finite element analysis of ordinary masonry wall and plastic masonry wall shows that the hysteretic curve of plastic injection wall is smooth and full, and the consumption capacity is improved compared with that of ordinary masonry wall. The masonry is reinforced with structural glue as glue injection material, which has obvious effect and is convenient and feasible.
【学位授予单位】：山东农业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TU364
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