【摘要】：我國(guó)的建筑工程填充墻大多采用砌塊砌筑,需要在結(jié)構(gòu)的相關(guān)部位增設(shè)鋼筋混凝土構(gòu)造柱,保障對(duì)填充墻的約束作用,避免在地震時(shí)墻體散落。在長(zhǎng)期工程實(shí)踐過(guò)程中,傳統(tǒng)的鋼筋混凝土構(gòu)造柱施工困難,存在混凝土澆搗不密實(shí)等質(zhì)量通病。其設(shè)計(jì)用材、施工工藝等,已經(jīng)不適宜現(xiàn)代建筑材料和施工方法,更不能滿足快速施工、縮短工期的要求。為此,本文研究一種新型的輕鋼構(gòu)造柱來(lái)替代傳統(tǒng)的鋼筋混凝土構(gòu)造柱,實(shí)現(xiàn)工業(yè)化生產(chǎn),現(xiàn)場(chǎng)快速組裝,以提高工效、降低成本、確保工程質(zhì)量。本文圍繞輕鋼構(gòu)造柱技術(shù)開(kāi)展的主要研究工作如下:(1)根據(jù)工程需要設(shè)計(jì)了一字墻,T型墻,十字型墻,L型墻的輕鋼構(gòu)造柱截面�？紤]工程抗震最不利情況,研究輕鋼構(gòu)造柱應(yīng)用于一字墻的受力特性和約束墻體的作用效果。進(jìn)行輕鋼構(gòu)造柱和傳統(tǒng)混凝土構(gòu)造柱約束的墻片試件的對(duì)比試驗(yàn)。通過(guò)對(duì)比墻片試件極限承載力、墻體和構(gòu)造柱的破壞形態(tài)及最大位移、拉結(jié)筋應(yīng)力等,證明了輕鋼構(gòu)造柱在墻體受到水平荷載作用下,有效約束墻體位移,其作用效果優(yōu)于混凝土構(gòu)造柱。輕鋼構(gòu)造柱與墻體連接可靠,且自身剛度大位移很小,應(yīng)力遠(yuǎn)小于鋼材屈服強(qiáng)度,有較大的安全儲(chǔ)備。(2)采用有限元軟件ABAQUS,建立輕鋼構(gòu)造柱約束墻體試件在平面外水平荷載作用下的理論分析模型。模擬結(jié)果與試驗(yàn)數(shù)據(jù)吻合較好,驗(yàn)證了有限元模型的準(zhǔn)確性和可靠性。同時(shí),有限元模擬結(jié)果可作為對(duì)輕鋼構(gòu)造柱墻片試驗(yàn)數(shù)據(jù)的補(bǔ)充,通過(guò)應(yīng)力云圖和位移云圖,全面了解輕鋼構(gòu)造柱墻片試件的受力特征和應(yīng)力變化規(guī)律。(3)通過(guò)有限元軟件進(jìn)行輕鋼構(gòu)造柱應(yīng)用范圍擴(kuò)展模擬。模擬了墻長(zhǎng)5m~10m,高度2.5m~4m范圍的8個(gè)模型。對(duì)比分析構(gòu)造柱受力、墻體位移及拉結(jié)筋受力,了解輕鋼構(gòu)造柱受力變化的特點(diǎn),提出工程應(yīng)用改進(jìn)設(shè)計(jì)和構(gòu)造要求的建議。輕鋼構(gòu)造柱強(qiáng)度和剛度均滿足使用要求,且與墻體連接可靠。但墻體長(zhǎng)度越大,墻體自身跨中撓度增加;墻體高度越大,構(gòu)造柱自身位移增加,約束墻體邊界位移的能力下降,宜采取適當(dāng)?shù)臉?gòu)造措施。
[Abstract]:Block masonry is mostly used in the filling wall of construction engineering in our country, so it is necessary to add reinforced concrete structural columns to the relevant parts of the structure to ensure the restraint effect on the filled wall and avoid the wall scattered in earthquake. In the process of long-term engineering practice, the construction of traditional reinforced concrete structural columns is difficult, and there are some common problems such as the quality of concrete pouring is not dense and so on. Its design material, construction technology and so on, are no longer suitable for modern building materials and construction methods, and can not meet the requirements of rapid construction and shortening the construction period. Therefore, this paper studies a new type of light steel structural column to replace the traditional reinforced concrete structural column to realize industrial production and field rapid assembly in order to improve work efficiency, reduce cost and ensure engineering quality. The main research work of this paper is as follows: (1) according to the engineering needs, the light steel structural column sections of one-word wall, T-wall, cross-shaped wall and L-shaped wall are designed. Considering the most unfavorable seismic situation of the project, the mechanical characteristics of the light steel structural column applied to the one-word wall and the effect of the confined wall are studied. The comparative test of wall specimens constrained by light steel structural columns and traditional concrete structural columns is carried out. By comparing the ultimate bearing capacity of wall specimens, the failure form and maximum displacement of wall and structural column, and the stress of tension bar, it is proved that the light steel structural column can effectively restrain the displacement of wall under horizontal load. Its effect is better than that of concrete structural columns. The connection between light steel structural column and wall is reliable, and its stiffness is very small, the stress is much smaller than the yield strength of steel, and has a large safety reserve. (2) the finite element software ABAQUS, is used. The theoretical analysis model of light steel structural column confined wall specimen under horizontal load outside plane is established. The simulation results are in good agreement with the experimental data, which verifies the accuracy and reliability of the finite element model. At the same time, the finite element simulation results can be used as a supplement to the test data of light steel structure column wall, through stress cloud diagram and displacement cloud picture, The stress characteristics and stress variation of light steel structural column wall specimens are comprehensively understood. (3) the application range of light steel structural columns is simulated by finite element software. Eight models with wall length 5 m 鈮，

本文編號(hào)：2481705