混凝土-砌體組合托換梁受彎性能試驗研究
發(fā)布時間:2018-12-20 10:57
【摘要】:設(shè)計制作了2種不同組合形式、3種不同連接筋間距的混凝土-砌體組合托換梁共7根,對其進(jìn)行受彎性能試驗研究,分析了試件的撓度、鋼筋和混凝土應(yīng)變、承載能力以及最終破壞形態(tài)。研究表明:連接筋的設(shè)置能夠使混凝土梁與磚砌體保持良好的整體性能,共同受力;單面、雙面鋼筋混凝土-砌體組合托換梁的受彎承載力較對比試件均有增加,但連接筋間距的變化對承載力影響不大;基于混凝土、磚砌體材料簡化的本構(gòu)關(guān)系和基本計算假定,建立了適筋混凝土-砌體組合托換梁構(gòu)件的正截面受彎承載力計算式,并將其理論計算值與試驗值進(jìn)行了比較,驗證了其準(zhǔn)確性。
[Abstract]:Two kinds of different combination forms and three kinds of concrete-masonry composite underpinning beams with different spacing of connecting tendons were designed and made. The flexural behavior of the beams was studied and the deflection of the specimens, the strain of steel bar and concrete were analyzed. Bearing capacity and ultimate failure form. The results show that the installation of connecting bars can make concrete beam and brick masonry keep good overall performance and common force; The flexural bearing capacity of reinforced concrete masonry composite underpinning beams on one side and two sides are all increased compared with the contrast specimens, but the change of the distance between connecting bars has little effect on the bearing capacity. Based on the simplified constitutive relation and basic calculation assumption of concrete and brick masonry materials, a formula for calculating the flexural bearing capacity of normal section of reinforced concrete masonry composite beam members is established, and the theoretical calculation value is compared with the experimental value. The accuracy is verified.
【作者單位】: 揚州大學(xué)建筑科學(xué)與工程學(xué)院;江蘇省蘇科建設(shè)技術(shù)發(fā)展有限公司;
【基金】:國家自然科學(xué)基金項目(51278445,51308490) 江蘇省自然科學(xué)基金項目(BK20130450) 住房和城鄉(xiāng)建設(shè)部科學(xué)技術(shù)計劃項目(2013-K4-17)
【分類號】:TU398.5;TU317
[Abstract]:Two kinds of different combination forms and three kinds of concrete-masonry composite underpinning beams with different spacing of connecting tendons were designed and made. The flexural behavior of the beams was studied and the deflection of the specimens, the strain of steel bar and concrete were analyzed. Bearing capacity and ultimate failure form. The results show that the installation of connecting bars can make concrete beam and brick masonry keep good overall performance and common force; The flexural bearing capacity of reinforced concrete masonry composite underpinning beams on one side and two sides are all increased compared with the contrast specimens, but the change of the distance between connecting bars has little effect on the bearing capacity. Based on the simplified constitutive relation and basic calculation assumption of concrete and brick masonry materials, a formula for calculating the flexural bearing capacity of normal section of reinforced concrete masonry composite beam members is established, and the theoretical calculation value is compared with the experimental value. The accuracy is verified.
【作者單位】: 揚州大學(xué)建筑科學(xué)與工程學(xué)院;江蘇省蘇科建設(shè)技術(shù)發(fā)展有限公司;
【基金】:國家自然科學(xué)基金項目(51278445,51308490) 江蘇省自然科學(xué)基金項目(BK20130450) 住房和城鄉(xiāng)建設(shè)部科學(xué)技術(shù)計劃項目(2013-K4-17)
【分類號】:TU398.5;TU317
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