雙折線體外預(yù)應(yīng)力鋼絞線加固簡支梁的試驗研究.pdf

1、沈陽建筑大學(xué)碩士學(xué)位論文雙折線體外預(yù)應(yīng)力鋼絞線加固簡支梁的試驗研究姓名：楊洪申請學(xué)位級別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：張紹武2008-01碩士研究生學(xué)位論文 Abstract III Abstract This thesis puts forward an external pre- stressed steel stranded wire with two deviators reinforced simpl

2、y supported beam method. Through the corresponding theoretical analysis of the methods, derived cross section capacity, crack- resistant moment and deflections theory formula, which shows the advan

3、tages of this strengthening method. At the same time, in order to search the feasibility and concrete strengthening construction method of the above strengthening method, three testing beams wer

4、e made to do experimental research, a comparison of ordinary concrete beams and two different pre- stressed tension values of the pre- stressed reinforced concrete beams. Based on the experimental

5、 data, some curves were provided. Such as load- deflection, load- strain curves of pre- stressed reinforcement, load- strain curves of concrete. Combined with experiment curves and phenomenon, this

6、 thesis put up the following contrast between beams strengthened by external pre- stressing and reinforced beams: Stress and strain changes in section, the deformation of the beam, the fracture

7、developing of the beam. It described strengthened beams stress processes in details. According to the existing test research and analysis, research in the structure behavior of the external pre-

8、stressed reinforced systems, theory analysis on the stress features, calculating of ultimate bearing ability, and deformation of the reinforced systems, accurate descript and reasonable explain for

9、 the destruction states, stress and strain changes of the structure after strengthened. It is clearly that by the date of experiment, the bearing capacity of the beam with external pre- stresse

10、d steel stranded wire with two deviators can be increased significantly；the defection and the crack of the strengthened beam can be improved effectively, achieve the desired test reinforcement p

11、urposes. Established a strengthening beam model by the analysis software ANSYS, and then nonlinear analysis the reinforced beams, contrast the result of analysis with the result of experiment and

12、 the result of theory analysis, through analysis, test values and analysis values well anastomosed. Strengthening research and analysis the reinforced effects and its advantages for this external

13、 pre- stressed steel stranded wire reinforced method, summarized the experience in the test, laying a solid foundation for the actual reinforcement project. Key words: External pre- stressed techn