本文關(guān)鍵詞： 磚砌體 砌筑方式 抗壓強度 彈性模量 塊體高度　出處：《長沙理工大學》2015年碩士論文　論文類型：學位論文

【摘要】：磚砌體可以看作是一種由磚塊和砂漿組砌而成的整體材料。磚是一種古老的土木工程材料,因而磚砌體結(jié)構(gòu)的應(yīng)用具有悠久的歷史,其主要用于城墻、拱橋、寺院、佛塔等。磚砌體結(jié)構(gòu)發(fā)展至今,我國目前砌筑方式大多采用一順一丁式、三順一丁式和梅花丁的砌筑方法。19世紀20年代水泥的發(fā)明促使砂漿的強度得到了極大的提升,同時也促進了砌體結(jié)構(gòu)的發(fā)展和運用。眾多學者對砌體結(jié)構(gòu)計算理論進行了不斷深入的研究,并逐步完善其計算方法。砌體受壓作為其基本受力狀態(tài),砌體的抗壓強度、彈性模量等基本力學性能得到了充分的研究,并考慮其各種影響因素,提出了各種性能指標的理論計算公式。而砌體的砌筑方式并未作為影響因子考慮在理論計算中,為了提高理論計算的精度,有必要進行詳細的研究,考慮磚砌體砌筑方式對其受壓性能的影響。本文的主要研究內(nèi)容:(1)通過對以不同砌筑方式砌合的砌體進行軸心抗壓強度試驗,對比分析了不同砌筑方式砌體的破壞特征及強度極限值,討論了砌體的組砌方法對其抗壓強度的影響,并根據(jù)試驗結(jié)果求得了砌筑方式對砌體抗壓強度的影響系數(shù)取值。(2)在《砌體基本力學性能試驗方法標準》(GB/T50129-2011)的基礎(chǔ)上,根據(jù)試驗?zāi)康募霸嚰奶匦哉{(diào)整了軸心抗壓試驗的變形測點布置方案,得到準確的應(yīng)力-應(yīng)變數(shù)據(jù);擬合應(yīng)力-應(yīng)變數(shù)據(jù),得到各砌筑方式砌體本構(gòu)曲線上升段;分析試驗數(shù)據(jù),提出了不同砌筑方式砌體的本構(gòu)關(guān)系式與彈性模量計算公式。(3)對比不同高度磚塊下各砌筑方式砌體的抗壓強度值與彈性模量,分析比較得出砌筑方式對抗壓強度和彈性模量的影響與磚塊高度無關(guān)。(4)通過使用有限元分析軟件ABAQUS對各砌體試件受力性能進行有限元分析,將軟件得到的結(jié)果與試驗結(jié)果相對比,兩者相近,離散性較小,證明了試驗結(jié)果的有效性。本文在試驗以及有限元分析的基礎(chǔ)上,探討了砌筑方式對砌體基本力學性能的影響。提出砌筑方式這一影響因素的系數(shù)值,并為理論計算公式的改進提供了試驗依據(jù)。
[Abstract]:Brick masonry can be regarded as an integral material composed of bricks and mortar. Brick is an ancient civil engineering material, so the application of brick masonry structure has a long history, it is mainly used in walls, arch bridges, monasteries, Pagodas and so on. The development of brick masonry structure up to now, most of the present masonry methods in our country adopt the type of one-in-one, the masonry method of Sanshun and the masonry method of plum blossom Ding. In 20s, the invention of cement in the 19th century promoted the strength of mortar greatly. At the same time, it also promotes the development and application of masonry structure. Many scholars have studied the theory of masonry structure calculation deeply, and gradually improved its calculation method. Masonry compression as its basic stress state, masonry compressive strength, The basic mechanical properties, such as modulus of elasticity, have been fully studied, and various influencing factors have been considered, and the theoretical calculation formulas of various performance indexes have been put forward. However, the masonry mode of masonry has not been considered as the influence factor in the theoretical calculation. In order to improve the accuracy of theoretical calculation, it is necessary to carry out detailed research. Considering the influence of masonry methods on the compressive performance of brick masonry, the main research content of this paper is: 1. The axial compressive strength test of masonry masonry with different masonry methods is carried out. The failure characteristics and strength limit values of masonry with different masonry methods are compared and analyzed, and the influence of masonry composition method on its compressive strength is discussed. Based on the test results, the influence coefficient of masonry mode on the compressive strength of masonry is obtained. Based on the Standard of testing method for basic Mechanical Properties of masonry (GB / T50129-2011), According to the purpose of the test and the characteristics of the specimen, the layout scheme of the deformation measuring points of the axial compression test is adjusted to obtain the accurate stress-strain data, the stress-strain data are fitted, and the rising sections of the constitutive curves of each masonry are obtained. By analyzing the test data, the constitutive relation formula and elastic modulus calculation formula of masonry with different masonry modes are put forward, and the compressive strength and elastic modulus of masonry masonry with different height are compared. Analysis and comparison show that the influence of masonry method on compressive strength and elastic modulus has nothing to do with the height of brick. The finite element analysis software ABAQUS is used to analyze the mechanical properties of masonry specimens. Comparing the results obtained by the software with the experimental results, the results are similar, and the discreteness is small, which proves the validity of the test results. In this paper, based on the experiments and the finite element analysis, The influence of masonry mode on the basic mechanical properties of masonry is discussed. The coefficient value of the influencing factor of masonry mode is put forward and the experimental basis is provided for the improvement of theoretical calculation formula.
【學位授予單位】：長沙理工大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TU364

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