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    蘇州混凝土水泥制品研究院有限公司

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    房建材料及制品

    不同隔振方案下混凝土框架結構的抗震性能對比與優化分析
    不同隔振方案下混凝土框架結構的抗震性能對比與優化分析
    • 盧紅霞1,周振綱2
    2021年第10期
    摘要
    引用本文
    摘 ? 要:為了分析和對比不同隔振方案下混凝土框架結構的抗震性能,建立了混凝土框架三維模型,設定基礎隔振、2層隔振、4層隔振和6層隔振四種隔振方案,對地震輸入參數和隔振支座參數進行了研究,依據SAP軟件內置的EL波和CPC波,分析了模型的基礎剪應力、層間剪應力和頂層結構加速變化規律。結果表明:不同地震波輸入后,有隔振的模型層間剪應力、基礎剪應力和頂層加速度相較于無隔振方案均大幅降低,但水平方向上差別不大;采用基礎隔振和2層隔振后,模型的基礎剪應力從10 988~13 666 kN降至2 366~3 544 kN,降低幅度達73%~81%;四種隔振方案的綜合評價值分別為0.89、0.91、0.83和0.70,其中,2層隔振方案的施工成本和抗震性能均最優,基礎隔振方案次之,但施工成本稍高,4層和6層隔振方案較差。 Abstract: In order to analyze and compare the seismic performance of concrete frame structure under different vibration isolation schemes, a three-dimensional model of concrete frame structure was established, and four vibration isolation schemes were set for foundation vibration isolation, 2-story vibration isolation, 4-story vibration isolation, and 6-story vibration isolation, and the seismic input parameters and vibration isolation support parameters were studied. According to the built-in EL wave and CPC wave of SAP software, the variation laws of foundation shear stress, interlayer shear stress and acceleration of top structure of the model were analyzed. The results show that after different seismic waves are input, the interlayer shear stress, ?foundation shear stress and top floor acceleration of the vibration isolation model are significantly reduced compared with those without vibration isolation scheme, but there is little difference in the horizontal direction. For foundation vibration isolation and 2-story vibration isolation, the foundation shear stress of the model decreases from 10 988~13 666 kN to 2 366~3 544 kN, with a reduction range of 73%~81%. The comprehensive evaluation values of the four vibration isolation schemes are 0.89, 0.91, 0.83 and 0.70 respectively. Among them, the construction cost and seismic performance of the 2-story vibration isolation scheme are the best, and the foundation vibration isolation scheme is the second, but the construction cost is slightly higher, and the 4-story and 6-story vibration isolation schemes are poor.
    盧紅霞,周振綱.不同隔振方案下混凝土框架結構的抗震性能對比與優化分析[J].混凝土與水泥制品,2021(10):72-76. LU H X,ZHOU Z G.Analysis of Seismic Performance of Concrete Frame Structure Under Different Vibration Isolation Schemes[J].China Concrete and Cement Products,2021(10):72-76.
    灌漿接頭單向拉伸性能的研究分析
    灌漿接頭單向拉伸性能的研究分析
    • 佟曉超,王 博,昌文芳,崔德奎
    2021年第10期
    摘要
    引用本文
    摘 ? 要:研究了灌漿料和鋼筋之間的黏結強度與灌漿料抗壓強度的關系,分析了利用新型工藝制造的套筒是否滿足JGJ 355—2015《鋼筋套筒灌漿連接應用技術規程》的要求,并通過既有168個鋼筋拔出試驗數據驗證了黏結強度與灌漿料抗壓強度之間的線性關系。結果表明:黏結強度與灌漿料抗壓強度存在強相關性;利用滾壓、擠壓、鑄造和切削工藝制得的套筒均滿足JGJ 355—2015對于連接件破壞的要求。 Abstract: The relationship between the bond strength of grouting materials and steel bar and the compressive strength of grouting materials was studied, and whether the sleeve made by the new technology could meet the requirements of JGJ 355—2015 Technical Specification for Groute Sleeve Splicing of Rebars was analyzed. The linear relationship between the bond strength and the compressive strength of grouting materials was verified by using the existing datas of 168 rebar pulling out tests. The results show that there is a strong correlation between bond strength and compressive strength of grouting materials. The sleeves made by rolling, extrusion, casting and cutting process can meet the requirements of JGJ 355—2015 for connection failure.
    佟曉超,王博,昌文芳,等.灌漿接頭單向拉伸性能的研究分析[J].混凝土與水泥制品,2021(10):67-71. TONG X C,WANG B,CHANG W F,et al.Research and Analysis of Uniaxial Tensile Properties of Grouting Joints[J].China Concrete and Cement Products,2021(10):67-71.
    超輕泡沫混凝土結構斷層成因及抑制措施研究
    超輕泡沫混凝土結構斷層成因及抑制措施研究
    • 楊 俊1,2,楊鼎宜1,王武祥2,3,劉曉通4,張磊蕾2,3,王愛軍2,吳子豪2
    2021年第10期
    摘要
    引用本文
    摘 ? 要:研究了超輕泡沫混凝土結構斷層成因及抑制措施。結果表明:水膠比、漿體溫度、速凝劑和纖維摻量對超輕泡沫混凝土中結構斷層的形成有重要影響;通過改善發泡漿體的性能、優化水溫及速凝劑摻量來平衡料漿的發泡速率和凝結硬化速率、添加纖維來提高多孔結構抵抗內應力的能力,均能有效解決超輕泡沫混凝土結構斷層問題;適宜的技術參數為:水膠比控制在0.885~0.965之間,水溫設定為30 ℃,速凝劑摻量為6.0%,纖維摻量不低于0.75%。 Abstract: The causes of structural faults and the suppression measures of ultra light foamed concrete were studied. The results show that the water-binder ratio, slurry temperature, accelerating agent and fiber content have important effects on the formation of structural faults in ultra light foamed concrete. The fault problem of ultra light foamed concrete structure can be effectively solved by improving the performance of the foamed slurry, optimizing the water temperature and the accelerating agent content to balance the foaming rate and setting and hardening rate of the slurry, and adding fibers to improve the ability of the porous structure to resist internal stress. The suitable technical parameters are as follows: water-binder ratio is controlled between 0.885 and 0.965, water temperature is 30 ℃, accelerator agent content is 6.0%, fiber content is not less than 0.75%.
    楊俊,楊鼎宜,王武祥,等.超輕泡沫混凝土結構斷層成因及抑制措施研究[J].混凝土與水泥制品,2021(10):62-66. YANG J,YANG D Y,WANG W X,et al.Study on Causes and Restraining Measures of Ultra Light Foamed Concrete Structure Faults[J].China Concrete and Cement Products,2021(10):62-66.
    交變荷載作用下CFRP布加固RC梁耐久性能試驗研究
    交變荷載作用下CFRP布加固RC梁耐久性能試驗研究
    • 王吉文1,杜曉明2,袁振圣3
    2021年第10期
    摘要
    引用本文
    摘 ? 要:為了探究CFRP布加固鋼筋混凝土梁(RC梁)在交變荷載作用下的耐久性,對8根CFRP布加固RC梁進行了恒載和交變荷載作用下的15 d、30 d老化試驗,并通過三點彎曲試驗得到了試驗梁在不同荷載作用下的破壞模式、極限荷載、極限應變、彎曲性能、裂縫數量以及裂縫寬度。結果表明:經交變荷載作用15 d、30 d后,CFRP布加固RC梁的力學性能下降顯著,試驗梁的極限荷載、剝離荷載與極限應變均呈下降趨勢;與相同齡期下的恒載(24 kN)相比,交變荷載作用15 d、30 d后,試驗梁的極限應變平均降低了11.44%、15.23%;交變載荷作用下CFRP布加固RC梁的抗裂性能與彎曲性能減弱程度比恒載作用更顯著。 Abstract: In order to explore the durability of reinforced concrete(RC) beams strengthened with CFRP sheets under alternating loads, eight CFRP cloth-reinforced RC beams were subjected to 15 d and 30 d aging tests under dead and alternating loads, and the failure mode, ultimate strain, bending properties, crack number and crack width of test beams under different loads were obtained through the three-point bending tests. The results show that after 15 d and 30 d of alternating loads, the mechanical properties of RC beams strengthened with CFRP sheets decrease significantly, and the ultimate load, peeling failure load and ultimate strain of the test beams decrease. Compared with the dead load(24 kN) under the same age, the ultimate strain of the test beam is reduced by 11.44% and 15.23% on average after the alternating loads is applied for 15 d and 30 d. The crack resistance and bending properties of the test beams under alternating loads is weaker than that under dead loads.?
    王吉文,杜曉明,袁振圣.交變荷載作用下CFRP布加固RC梁耐久性能試驗研究[J].混凝土與水泥制品,2021(10):57-61. WANG J W,DU X M,YUAN Z S.Experimental Study on Durability of RC Beams Strengthened with CFRP Sheets Under Alternating Loads[J].China Concrete and Cement Products,2021(10):57-61.
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