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側(cè)移剛度退化對(duì)高層R.C框架—剪力墻結(jié)構(gòu)水平剪力重分布影響的仿真分析

發(fā)布時(shí)間:2019-03-15 16:45
【摘要】:框架剪力墻結(jié)構(gòu)是由框架和剪力墻通過樓板結(jié)合在一起協(xié)同工作,此時(shí),框架和剪力墻已經(jīng)不能按照各自原有的變形方式來變化,呈現(xiàn)出來的變形是彎剪型變形特征。剪力墻結(jié)構(gòu)的抗側(cè)剛度相對(duì)框架結(jié)構(gòu)大,所以,在框架剪力墻結(jié)構(gòu)體系中,通常剪力墻承擔(dān)了大部分的水平作用力,但當(dāng)結(jié)構(gòu)進(jìn)入彈塑性工作階段后,結(jié)構(gòu)發(fā)生內(nèi)力重分配,框架承擔(dān)的水平力比值相對(duì)于彈性階段的比值開始增大,然而比例到底增大多少至今尚無定論。我國(guó)《高規(guī)》9.1.11對(duì)此作出了做出了相關(guān)調(diào)整。但此調(diào)整方法是依靠工程經(jīng)驗(yàn)而提出來的,因此需要完善。本文首先分別對(duì)一榀鋼筋混凝土框架結(jié)構(gòu)和一整體矮剪力墻結(jié)構(gòu)試驗(yàn)進(jìn)行有限元仿真分析,并與試驗(yàn)結(jié)果進(jìn)行比較,從而驗(yàn)證三維實(shí)體退化虛擬層合單元理論及其程序的合理、有效性。然后,遵循二道防線的設(shè)計(jì)概念,分別選取單片剪力墻抗側(cè)剛度退化最快,而單榀框架抗側(cè)剛度退化最慢的軸壓比,進(jìn)行最不利剛度退化速率組合,構(gòu)建三個(gè)不同剛度特征值即底部初始剪力比值不同的對(duì)稱的“干凈”的鋼筋混凝土框架剪力墻結(jié)構(gòu)。通過仿真分析,探討框架剪力墻結(jié)構(gòu)在水平荷載作用下的承載力、層間位移、各自抗側(cè)剛度退化的情況、框架與剪力墻中剪力分配的變化和隨樓層變化的規(guī)律。最后根據(jù)分析結(jié)果得出相關(guān)結(jié)論,并為工程實(shí)際設(shè)計(jì)提供參考。
[Abstract]:The frame shear wall structure is composed of a frame and a shear wall, and the frame and the shear wall can not be changed according to the original deformation mode, and the deformation of the frame and the shear wall can be changed according to the original deformation mode. The anti-lateral stiffness of the shear wall structure is relatively large, so, in the frame shear wall structure system, the shear wall bears most of the horizontal force, but when the structure enters the elastic-plastic working phase, the structure has the internal force redistribution, The ratio of the horizontal force ratio of the frame with respect to the elastic phase begins to increase, yet the proportion is not conclusive yet. Our country's 9.1.11 has made relevant adjustments to this. But this adjustment method is based on engineering experience, so it needs to be perfected. In this paper, a finite element simulation analysis of a reinforced concrete frame structure and an overall short shear wall structure test is carried out respectively, and compared with the test results, so as to verify the reasonable and effective method of the three-dimensional entity degradation virtual laminated unit theory and the program. then, according to the design concept of the two lines of defense, the resistance side stiffness of the single-piece shear wall is selected to be the fastest, and the axial compression ratio of the one-piece frame anti-side stiffness is the slowest, and the most unfavorable stiffness degradation rate combination is carried out, Three reinforced concrete frame shear wall structures with different stiffness characteristic values, i.e. different bottom initial shear ratios, are constructed. Through the simulation analysis, the bearing capacity, the interlayer displacement, the deformation of the lateral stiffness of the frame and the shear wall under the influence of the horizontal load, the change of the shear distribution in the frame and the shear wall and the law of the change of the floor are discussed. Finally, according to the results of the analysis, the relevant conclusions are drawn, and the reference for the practical design of the project is provided.
【學(xué)位授予單位】:南昌大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2016
【分類號(hào)】:TU973.16

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 萬寶;側(cè)移剛度退化對(duì)高層RC框架—剪力墻(框架—核心筒)結(jié)構(gòu)水平剪力重分布影響的仿真分析[D];南昌大學(xué);2017年



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