本文選題：復合砂漿 + 抗剪加固��； 參考：《吉林建筑大學》2017年碩士論文

【摘要】：復合砂漿鋼筋網(wǎng)加固法是一種比較新穎的用于補強砌體結(jié)構(gòu)或者混凝土結(jié)構(gòu)的加固技術(shù)。隨著社會發(fā)展,建筑結(jié)構(gòu)的多樣化,原有的加固技術(shù)難以滿足當今多樣的建筑結(jié)構(gòu),導致這種新型加固技術(shù)越來越受到青睞。該種加固技術(shù)有多種優(yōu)點:(1)這種加固方式在本質(zhì)上是一種體外配筋,即利用增加構(gòu)件的配筋量,來達到提高構(gòu)件抗彎、抗剪等性能的目的。(2)復合砂漿具有優(yōu)良的物理性能,可以很好的保護鋼筋網(wǎng),同時也可以配合原結(jié)構(gòu)協(xié)同工作。(3)該加固技術(shù)適用于加固各種結(jié)構(gòu),應用范圍較廣。由于該加固技術(shù)比較新穎,現(xiàn)在對該技術(shù)的研究較少,特別是對加固梁的抗剪性能研究,本文主要通過模擬復合砂漿鋼筋網(wǎng)加固后的鋼筋混凝土梁受剪作用,來研究該加固技術(shù)對梁抗剪性能的影響。本文首先利用ABAQUS有限元分析軟件模擬已知的兩根試驗梁,然后對比模擬梁和試驗梁的數(shù)據(jù),來驗證有限元模型的準確性和可靠度,結(jié)果表明,本文所建立的模型準確可靠且可用于模擬其他梁。本文通過ABAQUS有限元軟件模擬了13根梁(3根對比梁,10根加固梁)的抗剪試驗。通過分析剪跨比、加固方法、加固箍筋配筋率以及加固箍筋分布方式對加固梁抗剪承載力、破壞形態(tài)、撓度以及箍筋應變的影響,深入研究復合砂漿加固法對梁的抗剪性能。模擬結(jié)果表明:梁的抗剪承載力隨著剪跨比的增大而減小;加固配箍率越大,對梁抗剪承載力提高的越大,但兩者不成正比,繼續(xù)加大加固配箍率,提高的幅度會相對折減;加固配箍率對加固梁的荷載-箍筋應變曲線影響較小;剪跨區(qū)加固箍筋的位置影響加固梁的抗剪承載力。利用“桁架-拱”理論推導出復合砂漿鋼筋網(wǎng)加固梁的抗剪承載力理論計算公式,理論計算公式計算出的加固梁抗剪承載力與模擬結(jié)果比較吻合。
[Abstract]:The reinforcement technology of composite mortar reinforcement is a kind of new reinforcement technology for reinforcing masonry structure or concrete structure. With the development of society and the diversification of the building structure, the original reinforcement technology is difficult to meet the various architectural structures, and this new reinforcement technique is becoming more and more popular. There are many kinds of reinforcement technology. Advantages: (1) this reinforcement method is in essence an external reinforcement, that is, to increase the reinforcement amount of the component to improve the bending and shearing properties of the components. (2) the composite mortar has excellent physical properties, and it can protect the steel net well, and also work in coordination with the original structure. (3) the reinforcement technology is suitable for reinforcement. All kinds of structures have a wide range of applications. Because of the new reinforcement technology, there is little research on this technology, especially for the study of the shear performance of reinforced beams. This paper mainly studies the effect of the reinforcement technology on the shear performance of the beams by simulating the Liang Shoujian effect of reinforced concrete after reinforcement of the reinforced concrete reinforced concrete mortar. The ABAQUS finite element analysis software is used to simulate two known test beams, then compare the data of the simulated beam and the test beam to verify the accuracy and reliability of the finite element model. The results show that the model established in this paper is accurate and reliable and can be used to simulate other beams. In this paper, 13 beams (3 contrast beams, 10) are simulated by the ABAQUS finite element software. By analyzing the shear span ratio, the reinforcement method, the reinforcement ratio of the stirrups and the distribution mode of the reinforced hoop reinforcement on the shear bearing capacity, the damage form, the deflection and the strain of the stirrup, the shear strength of the composite mortar reinforcement method is deeply studied. The simulation results show that the shear bearing capacity of the beam is with the shear span. The greater the ratio of the ratio, the greater the reinforcing hoop rate, the greater the shear strength of the beam, the greater the shear strength of the beam, but the two will not be proportional to the reinforcement ratio, and the increase of the increase will be relatively reduced; the reinforcement and the stirrup ratio has little effect on the load and the strain curve of the reinforced beam; the position of reinforcing stirrup in the shear span affects the shear bearing capacity of the reinforced beam. The theoretical calculation formula of the shear bearing capacity of the reinforced concrete beams reinforced with composite mortar is derived from the truss arch theory. The shear capacity of the reinforced beam calculated by the theoretical calculation formula is in agreement with the simulation results.
【學位授予單位】：吉林建筑大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TU375.1

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