本文選題：型鋼混凝土短肢剪力墻 + 碳纖維布�。� 參考：《廣西大學(xué)》2017年碩士論文

【摘要】：本文設(shè)計修復(fù)了 5個1/2縮尺的型鋼混凝土短肢剪力墻試件,采用低周往復(fù)加載的方法對它們的抗震性能進行了科學(xué)系統(tǒng)的分析。5個試件具有相同的配筋形式和軸壓比,以有無斜撐、屈曲鋼筋是否修補和CFRP布加固方案作為變化因子。通過觀察試件的破壞模式,記錄CFRP布的剝離破壞情況,同時測量了各試件的荷載-位移曲線,由此對修復(fù)試件的承載能力及承載力退化、剛度退化、變形能力、耗能性能、變形特征等進行了對比分析,并將基于兩種承載力計算模型的計算結(jié)果與試驗結(jié)果進行對比分析,得到主要結(jié)論如下:(1)5個修復(fù)試件受力過程都經(jīng)歷了相似的四個階段,即彈性階段、CFRP剝離階段、屈服階段和破壞階段。各試件均是以彎曲變形為主的彎剪破壞。(2)修復(fù)試件時,替換試件根部屈曲鋼筋不會顯著影響試件的極限荷載,但可以明顯提高試件的屈服荷載與初始剛度,改善試件的延性和耗能性能。(3)修復(fù)試件中的鋼筋斜撐可以顯著提高試件的屈服荷載,明顯改善試件的極限承載力、延性和耗能性能,減緩試件的強度與剛度退化。(4)兩種CFRP布加固方案均能有效恢復(fù)試件的承載力、剛度、延性和耗能性能,改善試件的強度及剛度退化。(5)A方案的加固效果優(yōu)于B方案。采用A方案加固的試件,其承載力可恢復(fù)至原值的90%以上,強度與剛度退化也明顯好于原試件,修復(fù)試件的后期剛度甚至高于原試件,表明X形CFRP布可在一定程度上代替鋼筋斜撐。(6)兩種加固方案中,水平CFRP壓條均能有效限制試件表面CFRP布的剝離。(7)采用基于能量法和拉壓桿模型的兩種承載力計算方法所得承載力值與實測值的偏差均較小,故該兩種方法均適用于CFRP加固震損型鋼混凝土短肢剪力墻試件的理論承載力計算。
[Abstract]:In this paper, 5 steel reinforced concrete short leg shear wall specimens with 1 / 2 scale have been designed and repaired, and their seismic performance has been analyzed scientifically and systematically by the method of low cycle reciprocating loading. The five specimens have the same reinforcement form and axial compression ratio. With or without diagonal brace, whether the buckling reinforcement repair and CFRP reinforcement as a change factor. By observing the failure mode of the specimen, the peeling failure of the CFRP cloth was recorded, and the load-displacement curve of each specimen was measured, which resulted in the degradation of the bearing capacity and bearing capacity of the repaired specimen, the degradation of stiffness, the deformability of deformation, and the energy dissipation performance. The deformation characteristics are compared and analyzed, and the calculated results based on the two kinds of bearing capacity calculation models are compared with the experimental results. The main conclusions are as follows: 1) the stress process of the five repaired specimens has undergone similar four stages. They are elastic stage, yield stage and failure stage. When each specimen is repaired by bending shear failure, the ultimate load of the specimen will not be significantly affected by the replacement of the buckling bar at the root of the specimen, but the yield load and initial stiffness of the specimen can be improved obviously. Improving the ductility and energy dissipation performance of the specimen. 3) repairing the inclined bracing of the steel bar in the specimen can significantly increase the yield load of the specimen, and obviously improve the ultimate bearing capacity, ductility and energy dissipation performance of the specimen. Both CFRP reinforcement schemes can effectively restore the bearing capacity, stiffness, ductility and energy dissipation performance of the specimens, and improve the strength and stiffness degradation of the specimens. The reinforcement effect of the scheme is better than that of the B scheme. The strength and stiffness of the specimens strengthened with the A scheme can be restored to more than 90% of the original value, and the strength and stiffness degradation of the specimens is obviously better than that of the original specimens, and the later stiffness of the repaired specimens is even higher than that of the original specimens. It shows that X-shaped CFRP cloth can be used to replace oblique brace of steel bar to some extent. Horizontal CFRP strip can effectively limit the exfoliation of CFRP cloth on the surface of the specimen.) the deviation between the bearing capacity value and the measured value is small by using the two calculation methods based on energy method and tension and compression bar model. Therefore, the two methods can be used to calculate the theoretical bearing capacity of the specimens strengthened with CFRP.
【學(xué)位授予單位】：廣西大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TU398.2;TU352.11

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本文編號：1951054