【摘要】：自古以來,我國的磚石建筑分布廣泛,在建筑風格上獨具特色。磚石建筑不僅體現(xiàn)著中國建筑技術的精湛,也體現(xiàn)著我國古代文化的博大精深。磚石砌體是以砂漿作為粘結材料,將磚石塊材按一定的砌筑方式粘結為一體,磚石砌體是一種很不均勻的網狀結構體系。磚石砌體中許多灰縫存有大量的原始孔隙和孔洞,致使灰縫的砂漿飽滿度低,再加上當時的砌筑砂漿強度低、施工質量差,從而明顯的降低了磚石砌體的抗剪性能�，F(xiàn)役磚石建筑多以傳統(tǒng)民居為主,由于磚石傳統(tǒng)民居建造技術與材料的使用、風雨侵蝕及地震破壞,我國現(xiàn)存磚石傳統(tǒng)民居都存在不同程度的損傷,需要進行加固,以便抵抗未來可能面臨的地震作用。迄今為止,國內采用水泥砂漿面層、外加約束構件及灌漿加固等方法對磚石民居進行加固,但是水泥砂漿面層和外加約束構件加固法會損害磚石傳統(tǒng)民居的原有建筑風格。本文采用建筑結構膠作為加固材料,在灌漿加固理論的基礎上,以結構膠為注膠材料對磚石砌塊砌體進行鉆孔注膠加固。建筑結構膠作為一種建筑膠黏劑,應用于承重結構構件的粘結,在使用過程中結構膠能承受設計應力和環(huán)境作用。本試驗使用環(huán)氧樹脂結構膠和硅酮結構膠作為注膠材料,研究結構膠對磚石砌塊砌體的加固作用。本文運用試驗研究、理論分析和數(shù)值分析相結合的研究方法,遵循由砌塊砌體抗剪性能研究到磚石砌塊墻抗剪能力深入分析的研究思路,以物理試驗成果為基礎,數(shù)值分析為補充,開展磚石砌塊墻抗剪性能研究工作。在本文中,介紹了對砌塊砌體灰縫注膠的方法;分析注膠砌塊砌體抗剪的破壞機理、破壞荷載、破壞形態(tài);建立計算注膠砌塊砌體的復合強度公式,通過復合強度計算注膠砌塊砌體的抗剪強度。同時,應用有限元軟件ABAQUS,對在壓-剪受力狀態(tài)下的磚石砌塊墻進行研究,通過數(shù)值模擬,對普通磚石砌塊墻和灰縫注入環(huán)氧樹脂結構膠磚石砌塊墻進行有限元分析,得到了兩組墻體的滯回曲線、骨架曲線。通過結構膠加固磚石砌塊砌體的試驗與理論分析表明,環(huán)氧樹脂結構膠提高了磚石砌塊砌體的抗剪強度。硅酮結構膠提高了磚石砌塊砌體的破壞位移。對普通磚石墻體和注膠磚石墻體進行低周反復荷載有限元分析表明,注膠墻體滯回曲線光滑飽滿,比普通墻體的消耗能力得到了提升。采用結構膠作為注膠材料對磚石砌體進行加固,效果明顯,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.
【學位授予單位】：山東農業(yè)大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU364

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本文編號：2196655