【摘要】：鋼筋混凝土深梁受力不同于淺梁,梁腹開孔后受力更趨復(fù)雜�，F(xiàn)有的設(shè)計(jì)方法對(duì)深梁行為的解釋不夠完備,設(shè)計(jì)結(jié)果的適用性難以判斷,設(shè)計(jì)規(guī)范也沒有給出開孔深梁的設(shè)計(jì)條文。而且關(guān)于開孔深梁的非線性分析方面的研究較少。本文采用非線性有限元分析方法,對(duì)鋼筋混凝土開孔深梁展開仿真分析與設(shè)計(jì)研究,主要得到以下研究成果:在完成非線性有限元模型可靠性和有效性驗(yàn)證的基礎(chǔ)上,展開一系列開雙孔和偏孔深梁試驗(yàn)非線性仿真分析,解釋試驗(yàn)和仿真結(jié)果仍存在差異的原因,對(duì)比壓拉桿模型法設(shè)計(jì)開孔深梁相對(duì)傳統(tǒng)內(nèi)力法的優(yōu)勢(shì),驗(yàn)證深梁正截面應(yīng)變及應(yīng)力為非線性分布,探討深梁的應(yīng)力場(chǎng)與遺傳演化結(jié)構(gòu)優(yōu)化算法所得深梁壓拉桿模型之間的關(guān)系。按照線彈性應(yīng)力圖形法補(bǔ)充設(shè)計(jì)一開雙孔深梁,結(jié)合已有的同一深梁按內(nèi)力法和壓拉桿模型方法設(shè)計(jì)試驗(yàn),仿真對(duì)比三種不同設(shè)計(jì)方法的深梁包括結(jié)構(gòu)承載力、結(jié)構(gòu)延性、材料應(yīng)力場(chǎng)等各方面的力學(xué)性能,判斷相應(yīng)深梁設(shè)計(jì)方法的有效性和適用性。針對(duì)深梁的非線性受力特點(diǎn),在分析開孔深梁非線性階段應(yīng)力場(chǎng)分布和演變過(guò)程的基礎(chǔ)上,提出一種基于非線性分析的新設(shè)計(jì)方法,從理論層面闡述其相對(duì)基于彈性分析的設(shè)計(jì)方法的合理性,并通過(guò)開雙孔和開偏孔深梁算例的設(shè)計(jì)驗(yàn)證其在應(yīng)用上的普遍適用性,及在應(yīng)用結(jié)果上優(yōu)于其他設(shè)計(jì)方法的經(jīng)濟(jì)有效性。為開孔深梁的設(shè)計(jì)提供有益參考。以洞口形狀和布筋方式為研究參數(shù)設(shè)計(jì)一系列開孔深梁,通過(guò)仿真方法系統(tǒng)地分析這兩個(gè)主要因素對(duì)開孔深梁受力性能的影響,總結(jié)其對(duì)開孔深梁工作機(jī)理的影響規(guī)律,提出開孔深梁結(jié)構(gòu)在工程應(yīng)用上的有效設(shè)計(jì)建議。
[Abstract]:The stress of reinforced concrete deep beam is different from that of shallow beam. The existing design method is not enough to explain the behavior of deep beam, the applicability of the design result is difficult to judge, and the design code does not give the design provisions of deep beam with holes. Moreover, there is little research on nonlinear analysis of deep beam with open hole. In this paper, the nonlinear finite element analysis method is used to study the simulation and design of reinforced concrete deep beams with open holes. The main results are as follows: on the basis of the reliability and validity verification of nonlinear finite element model, In this paper, a series of nonlinear simulation analysis of double-hole and eccentric deep beam tests are carried out to explain the reasons for the difference between the test results and the simulation results, and to compare the advantages of the pressure-pull rod model method in the design of deep beams with holes compared with the traditional internal force method. It is verified that the normal section strain and stress of the deep beam are nonlinear distribution. The relationship between the stress field of the deep beam and the structural optimization algorithm of genetic evolution is discussed. According to the linear elastic stress pattern method, a double-hole deep beam is designed, and the same deep beam is designed according to the internal force method and the compression rod model method. The simulation results show that the deep beam with three different design methods includes the bearing capacity of the structure, the ductility of the structure. The effectiveness and applicability of the corresponding deep beam design method are judged by the mechanical properties of the material stress field and other aspects. According to the nonlinear stress characteristics of deep beam, a new design method based on nonlinear analysis is proposed on the basis of analyzing the distribution and evolution process of stress field in nonlinear stage of deep beam with holes. The rationality of the design method based on elastic analysis is expounded theoretically, and the universal applicability of this method is verified by the design of double-hole and open-hole deep beam. And the economic effectiveness of other design methods is better than that of other design methods in application results. It provides a useful reference for the design of deep beam with open hole. A series of deep beams with open holes are designed by taking the shape of holes and the way of reinforcement distribution as study parameters. The influence of these two main factors on the mechanical properties of deep beams with holes is systematically analyzed by simulation method, and the influence law of these two factors on the working mechanism of deep beams with open holes is summarized. The effective design suggestion of deep beam structure with open hole in engineering application is put forward.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TU375.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 孟影;汪基偉;冷飛;;水工混凝土結(jié)構(gòu)設(shè)計(jì)規(guī)范應(yīng)力圖形法配筋計(jì)算的比較[J];水利水電科技進(jìn)展;2014年02期

2 劉霞;易偉建;;優(yōu)化方法建立鋼筋混凝土梁壓桿-拉桿模型[J];工程力學(xué);2013年09期

3 劉霞;張鵠志;易偉建;賀華軍;;鋼筋混凝土開洞深梁拉壓桿模型方法與經(jīng)驗(yàn)方法試驗(yàn)對(duì)比研究[J];建筑結(jié)構(gòu)學(xué)報(bào);2013年07期

4 尹萬(wàn)云;金仁才;董洛廷;潘金龍;;基于ATENA的ECC/RC組合梁受彎性能非線性分析[J];江蘇建筑;2013年01期

5 劉霞;易偉建;;開孔深梁壓桿-拉桿模型構(gòu)造[J];工程力學(xué);2012年12期

6 韓玉蓮;趙繼勛;高陽(yáng);王磊;張曉磊;;基于有限元單元法的混凝土結(jié)構(gòu)配筋方法研究[J];水科學(xué)與工程技術(shù);2011年04期

7 劉霞;易偉建;;鋼筋混凝土平面構(gòu)件的配筋優(yōu)化[J];計(jì)算力學(xué)學(xué)報(bào);2010年01期

8 鄭愚;李春紅;Des.Ronbison;Su.Taylor;;混凝土橋面板中壓縮薄膜效應(yīng)的非線性有限元分析[J];華東公路;2009年03期

9 徐禮華;池寅;李榮渝;蘇潔;;鋼纖維混凝土深梁非線性有限元分析在ANSYS中的實(shí)現(xiàn)[J];巖土力學(xué);2008年09期

10 馬改改;簡(jiǎn)政;;高層結(jié)構(gòu)轉(zhuǎn)換梁彈性應(yīng)力與內(nèi)力配筋法的比較[J];山西建筑;2008年16期

相關(guān)會(huì)議論文 前1條

1 王建;;有關(guān)結(jié)構(gòu)有限元分析精度的幾個(gè)問(wèn)題探討[A];第五屆全國(guó)現(xiàn)代結(jié)構(gòu)工程學(xué)術(shù)研討會(huì)論文集[C];2005年

相關(guān)碩士學(xué)位論文 前4條

1 黃仕海;鋼筋混凝土D區(qū)構(gòu)件的研究與分析[D];湖南大學(xué);2013年

2 賀華軍;開孔簡(jiǎn)支深梁的優(yōu)化配筋試驗(yàn)研究[D];湖南大學(xué);2012年

3 林云;鋼筋混凝土簡(jiǎn)支深梁的試驗(yàn)研究及有限元分析[D];湖南大學(xué);2011年

4 夏亞偉;鋼筋混凝土深梁計(jì)算分析與設(shè)計(jì)研究[D];武漢理工大學(xué);2006年

，

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