本文關(guān)鍵詞： 外包鋼板-混凝土組合連梁 擬靜力試驗(yàn) 有限元 設(shè)計(jì)方法 聯(lián)肢剪力墻結(jié)構(gòu)　出處：《清華大學(xué)》2014年博士論文　論文類型：學(xué)位論文

【摘要】：為了連接外包鋼板-混凝土組合剪力墻，同時(shí)用于改善傳統(tǒng)鋼筋混凝土連梁延性不足的問題，作者提出了一種新型的外包鋼板-混凝土組合連梁。本論文對(duì)外包鋼板-混凝土組合連梁開展了系統(tǒng)、深入的研究，取得的主要研究成果如下： （1）模擬連梁在實(shí)際結(jié)構(gòu)中的受力特征，對(duì)6個(gè)外包鋼板-混凝土組合連梁試件進(jìn)行了擬靜力加載試驗(yàn)。試件的變化參數(shù)主要包括連梁的跨高比和鋼板厚度。通過對(duì)試驗(yàn)結(jié)果的深入分析，得到了外包鋼板-混凝土組合連梁的破壞機(jī)制、滯回特性、承載力、變形能力、剛度變化和承載力退化規(guī)律、耗能能力等。 （2）提出了外包鋼板-混凝土組合連梁的精細(xì)有限元建模方法，并對(duì)6個(gè)組合連梁試件和18個(gè)補(bǔ)充模型進(jìn)行了有限元建模計(jì)算。采用試驗(yàn)數(shù)據(jù)分析和有限元分析相結(jié)合的方法，對(duì)外包鋼板-混凝土組合連梁的傳力和變形機(jī)理進(jìn)行了深入研究，得到了組合連梁的外包鋼板應(yīng)力分布規(guī)律，混凝土中的應(yīng)力傳遞規(guī)律，以及連梁的變形組成和各部分變形對(duì)連梁整體變形的貢獻(xiàn)等。 （3）基于外包鋼板-混凝土組合連梁的傳力機(jī)理，推導(dǎo)得到了組合連梁抗剪承載力的求解方程，并進(jìn)一步建立了組合連梁抗剪承載力的簡(jiǎn)化計(jì)算公式�；谕獍摪�-混凝土組合連梁的變形機(jī)理，提出了組合連梁的剛度分析方法，，并建立了組合連梁的剛度計(jì)算公式。提出了改進(jìn)的墻肢與連梁的連接節(jié)點(diǎn)構(gòu)造，用于改善聯(lián)肢剪力墻結(jié)構(gòu)的變形和耗能能力。 （4）基于外包鋼板-混凝土組合連梁的承載力和剛度計(jì)算方法，提出了組合連梁的截面恢復(fù)力模型，并開發(fā)了組合連梁的非線性梁?jiǎn)卧Ｐ�。在此基礎(chǔ)上提出了組合聯(lián)肢剪力墻結(jié)構(gòu)的建模方法。采用該有限元建模方法，對(duì)本文設(shè)計(jì)的一個(gè)組合聯(lián)肢剪力墻結(jié)構(gòu)進(jìn)行了推覆分析，得到了組合聯(lián)肢剪力墻結(jié)構(gòu)在地震作用下的基本受力特點(diǎn)。 本論文通過試驗(yàn)研究和有限元分析，得到了外包鋼板-混凝土組合連梁的基本抗震性能和工作機(jī)理，同時(shí)提出了組合連梁的設(shè)計(jì)方法，開發(fā)了有限元模型，建立了組合聯(lián)肢剪力墻結(jié)構(gòu)的抗震分析方法。 本論文獲得國(guó)家科技支撐計(jì)劃(2011BAJ09B01)、國(guó)家自然科學(xué)基金(51178246)資助。
[Abstract]:In order to connect the sheet-concrete composite shear wall and improve the ductility of traditional reinforced concrete beams, A new type of sheet-concrete composite connecting beam is proposed. In this paper, a systematic and in-depth study on the sheet-concrete composite connecting beam is carried out. The main research results are as follows:. 1) simulating the mechanical characteristics of the connecting beam in the actual structure, The quasi-static loading tests were carried out on six specimens of steel plate concrete composite connecting beams. The variation parameters of the specimens mainly included the ratio of span to height and the thickness of steel plates. The failure mechanism, hysteretic characteristics, bearing capacity, deformation capacity, stiffness change and the law of bearing capacity degradation and energy dissipation of steel plate concrete composite connecting beams are obtained. (2) the fine finite element modeling method of sheet-concrete composite connecting beam is put forward, and the finite element modeling calculation of 6 specimens and 18 supplementary models is carried out. The method of combining test data analysis with finite element analysis is used. In this paper, the stress transfer and deformation mechanism of sheet-concrete composite beam are studied, and the stress distribution law of steel plate and the stress transfer law in concrete are obtained. And the deformation composition of the connecting beam and the contribution of each part deformation to the whole deformation of the connected beam. (3) based on the force transfer mechanism of steel plate and concrete composite beams, the equation of shear bearing capacity of composite beams is derived. Furthermore, a simplified formula for calculating the shear capacity of composite beams is established. Based on the deformation mechanism of steel plate and concrete composite beams, the stiffness analysis method of composite connecting beams is proposed. The stiffness calculation formula of the combined beam is established, and an improved joint structure is proposed to improve the deformation and energy dissipation capacity of the shear-wall structure. 4) based on the calculation method of bearing capacity and stiffness of steel plate concrete composite connecting beam, the section restoring force model of composite connecting beam is put forward. The nonlinear beam element model of combined beam is developed. Based on this, the modeling method of combined shear wall structure is put forward. By using the finite element modeling method, a combined coupled shear wall structure designed in this paper is analyzed by push-over analysis. The characteristics of combined shear wall structure subjected to earthquake are obtained. Through experimental research and finite element analysis, the basic aseismic performance and working mechanism of steel plate concrete composite connecting beam are obtained, and the design method of composite connecting beam is put forward, and the finite element model is developed. The seismic analysis method of combined shear wall structure is established. This paper is supported by the National Science and Technology support Program 2011 BAJ 09B 01, National Natural Science Foundation of China 51178246.
【學(xué)位授予單位】：清華大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2014
【分類號(hào)】：TU398

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