本文關(guān)鍵詞：型鋼混凝土十字形截面短肢剪力墻受力性能研究　出處：《西安科技大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 型鋼混凝土 十字形短肢剪力墻 混凝土強(qiáng)度等級 軸壓比 截面長寬比

【摘要】：21世紀(jì)人們的生活水準(zhǔn)不斷提高和科學(xué)技術(shù)日新月異促使住房質(zhì)量飛躍式的提升,促使新材料和新工藝不斷涌現(xiàn),出現(xiàn)許多新型結(jié)構(gòu),如型鋼混凝土短肢剪力墻,其廣泛應(yīng)用于高層住宅中。在國內(nèi)對十字形截面型鋼混凝土短肢剪力墻受力性能的研究少之又少,因此研究十字形短肢剪力墻的受力性能和抗震性能對指導(dǎo)工程實踐及充實理論具有重要的意義。本文利用大型通用軟件ANSYS對十字形型鋼混凝土短肢剪力墻采用實體建模的方法進(jìn)行有限元非線性分析,考慮混凝土強(qiáng)度等級、軸壓比、墻肢長寬比和型鋼配鋼率對構(gòu)件受力性能的影響,建立了13個有限元模型試件,系統(tǒng)分析了型鋼混凝土十字形截面短肢剪力墻在循環(huán)荷載作用下的滯回性能、骨架曲線、剛度退化特征、型鋼和混凝土的應(yīng)力分布等。闡述了結(jié)構(gòu)在循環(huán)荷載作用下,型鋼混凝土十字形截面短肢剪力墻的承載能力、變形能力和耗能能力的變化規(guī)律、結(jié)構(gòu)的破壞機(jī)理等。研究結(jié)果表明:混凝土強(qiáng)度等級對結(jié)構(gòu)的受力性能影響很大,混凝土強(qiáng)度等級越高,結(jié)構(gòu)的承載力越大,單調(diào)荷載作用下混凝土強(qiáng)度為C40時試件延性最好。循環(huán)荷載作用下,混凝土強(qiáng)度為C40時試件耗能能力最大,故建議混凝土強(qiáng)度一般宜選用C40左右;型鋼混凝土十字形短肢剪力墻隨著墻肢截面長寬比的增大其承載能力和延性呈現(xiàn)先增后減的趨勢。循環(huán)荷載作用下,截面長寬比較小的構(gòu)件其滯回性能較差,故建議該比值取值范圍為6-7。不同軸壓比的型鋼混凝土剪力墻在單調(diào)荷載作用下壓比型鋼受力性能較為相似,但循環(huán)荷載作用下,軸壓比為0.05和0.7的試件滯回性能較差,建議軸壓比取值范圍為0.25-0.5之間;型鋼配鋼率較小的構(gòu)件其滯回性能優(yōu)于配鋼率較大的構(gòu)件,但承載力相對有所減小,因此選定型鋼配鋼率時應(yīng)綜合考慮結(jié)構(gòu)滯回性能和承載力。本文通過對型鋼混凝土十字形短肢剪力墻在低周反復(fù)荷載作用下受力性能的分析,揭示了在地震作用下型鋼混凝土十字形短肢剪力墻的抗震性能及工作性能,得出了對型鋼混凝土短肢剪力墻的理論研究具有參考價值的結(jié)論。
[Abstract]:Twenty-first Century to enhance the living standards of the people and constantly improve the quality of science and technology change rapidly to promote housing leap, promote new materials and new technology constantly emerging, many new structures, such as steel reinforced concrete short pier shear wall, which is widely used in high-rise residential buildings. The research at home and cross section of steel reinforced concrete short pier shear wall the mechanical performance is less and less, so the study of cross shaped short pier shear wall bearing capacity and seismic performance has important significance for guiding engineering practice and enrich the theory. By using the method of ANSYS software of cruciform steel reinforced concrete short leg shear wall by solid modeling of nonlinear finite element analysis, consider the grade of concrete strength, axial compression ratio, shear wall length and width ratio of steel member effect on mechanical performance of steel ratio, established 13 finite element model of the specimen, the system analysis of steel The cross section of concrete short pier shear wall under cyclic loading hysteretic behavior, skeleton curve, stiffness degradation characteristics of steel and concrete stress distribution are expounded. The structure under cyclic load, short pier shear wall cross section of steel reinforced concrete bearing capacity, capacity and variation the energy dissipation capacity of deformation, the failure mechanism of structure. The research results show that concrete strength has great influence on the mechanical properties of the structure, the concrete strength grade is high, the bearing capacity is bigger, the strength of concrete under monotonic load is C40. The best ductility of specimens under cyclic loading, the strength of concrete is C40 the specimen energy dissipation capacity of the largest, so the strength of concrete in general should use C40; steel reinforced concrete short pier shear wall with cross section of wall length to width ratio increases the bearing capacity and ductility are increased first and then decreased The trend. Under cyclic loading, the component section width smaller the hysteretic performance is poor, it is suggested that the ratio of the range of steel reinforced concrete shear wall 6-7. different axial compression ratio under monotonic loading pressure ratio of steel mechanical properties are similar, but under cyclic loading, the axial compression ratio the hysteretic performance is poor in 0.05 and 0.7, suggested that the axial compression ratio range of 0.25-0.5; the content of steel specimens with small hysteretic performance is better than that with the component of the steel rate is larger, but the relative carrying capacity is reduced, so the selected steel ratio should be considered structural hysteretic behavior and the bearing capacity. Based on the analysis of the cruciform steel reinforced concrete short pier shear wall under low cyclic loading stress performance, revealed in the seismic performance and seismic performance of steel reinforced concrete under the cruciform short shear wall, the type of steel The theoretical study of concrete short shear wall has a reference value.

【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TU398.9

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本文編號：1373725