磚混結(jié)構(gòu)加層抗震加固設(shè)計(jì)研究
[Abstract]:Brick-concrete structure refers to the wall and column of vertical load-bearing structure in buildings, such as brick or block masonry, transverse load-bearing beam, floor slab, roof slab and so on, which adopt reinforced concrete structure. Brick-concrete structure is very popular in our country in 1950s and 1960s. Many residential and office buildings have been designed as brick-concrete structure. Because of the advantages of light weight, high strength and little influence on the foundation of the original structure, light steel layer structure is the first choice for the adding layer structure of brick-concrete structure, because of its many advantages, such as light weight, high strength, little influence on the foundation of original structure, and so on. The reinforcement design of brick-concrete structure under storied structure is a common concern of scholars at home and abroad in recent years. It provides a new method for the development of structural design towards a safer and more reasonable direction. In this paper, it is put forward that the design of adding storeys of buildings should be combined with the seismic strengthening of buildings. Combining with an engineering example, the author analyzes that the original structure is a brick-concrete structure and the upper part is a light steel structure. The main research work includes the following parts: (1) the design method of adding layer and original structure of steel structure and the construction measures of connection. When the lower part of the structure is brick-concrete structure, the reasonable structure scheme of adding layer to steel structure is adopted. At the same time, in order to increase the integrity of the structure after adding layers, it is necessary to design the connection joint between the steel structure and the original structure. In this paper, the method of adding inverse beam to the top of the original structure as the foundation of the steel structure with the column foot is adopted. Make the layer structure and the original structure reliable connection. (2) according to the analysis of the appraisal report of the original building and the characteristics of the existing seismic strengthening method of the brick and concrete structure, the concrete engineering example is used to analyze the masonry structure before adding the floor. Then, according to the principles and requirements of strengthening the original structure, the aseismic reinforcement of the structure is carried out, such as strengthening the wall with double-face reinforced steel mesh layer, adding additional structural columns, ring beams, and using rigid tension rods for the upper part of the inner wall. The whole reinforcement of the top floor with inverse beam is designed. The reinforcement technique and the related joint construction measures are adopted on the connection surface. In view of the engineering example, it is suggested that the 370mm 脳 240mm section of the additional structural column should be used in the seismic reinforcement of the brick and concrete structure building. The height of the ring beam is 240 mm, and the new structural column and ring beam are connected with the original masonry with steel bars above 桅 14. The structural integrity and seismic resistance of the structure can be improved by increasing the structural column and ring beam and adding the steel pull rod. (3) Seismic performance analysis of the top steel structure of brick and concrete structure: combined with the example of adding story in a brick and concrete teaching building, the PKPM calculation software is used to check and compare the masonry structure before and after strengthening. The design effect of reinforcement is expected by comparison of calculation results after reinforcement.
【學(xué)位授予單位】:河北工程大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2013
【分類號(hào)】:TU398.5;TU352.11
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