<table id="qrkot"><ruby id="qrkot"></ruby></table>
  1. <acronym id="qrkot"></acronym>
  2. <tr id="qrkot"><s id="qrkot"></s></tr>
  3. <table id="qrkot"><option id="qrkot"></option></table>
  4. <big id="qrkot"><ruby id="qrkot"></ruby></big>
  5. <track id="qrkot"></track>
    蘇州混凝土水泥制品研究院有限公司

    頭部文案

    發布時間:2020-01-06 00:00:00
    全國建材科技期刊
    全國中文核心期刊
    中國科技論文統計源期刊
    萬方數據-數字化期刊群入網期刊
    中國學術期刊(光盤版)全文收錄期刊
    華東地區優秀科技期刊
    江蘇省期刊方陣“雙效期刊”
    中國期刊網全文收錄期刊
    中國科技期刊數據庫全文收錄期刊

    全部文章

    水泥混凝土制品

    先張法預應力混凝土竹節管樁抗彎性能試驗研究
    先張法預應力混凝土竹節管樁抗彎性能試驗研究
    • 陳克偉
    2021年第7期
    摘要
    引用本文
    摘 ? 要:為研究竹節管樁的抗彎性能,以兩種樁型的竹節管樁為例,按樁身外徑計算得到了其開裂彎矩和極限彎矩,并進行了竹節管樁試件的開裂彎矩、極限彎矩、破壞特征及裂縫分布等抗彎性能試驗研究,對比分析了計算值和試驗值。結果表明:竹節管樁采用樁身直徑計算抗彎性能較合理,試驗值與理論計算值相比,極限彎矩的富余較大;竹節管樁的破壞形式為受拉區預應力鋼筋首先發生屈服,然后受拉區預應力鋼筋被拉斷,最后受壓區混凝土被壓碎;竹節管樁跨中截面應變分布基本符合平截面假定,豎向裂縫出現后截面中性軸上移,受壓區混凝土應變穩定增長。 Abstract: In order to study the flexural performance of the pretensioned spun nodular concrete pile, the theoretical cracking moment and ultimate bending moment of two types of piles were obtained with reference to the outer diameter of the pilet, and the experimental research on the flexural performance such as cracking moment, ultimate moment, failure characteristics and crack distribution were carried out. The results show that it is reasonable to use the diameter of the pile body to calculate the flexural performance of nodular concrete pile, and the surplus of the ultimate bending moment between the experimental value and the theoretical value is larger. The failure characteristics of nodular concrete pile are as follows: the prestressed reinforcement in tension zone yields first, the prestressed reinforcement in tension zone is broken, and finally the concrete in compression zone is crushed. The results conforms to the assumption of plane section. After the occurrence of vertical cracks, the neutral axis of the section moves up, and the strain of the concrete in the compression zone increases steadily.
    陳克偉.先張法預應力混凝土竹節管樁抗彎性能試驗研究[J].混凝土與水泥制品,2021(7):33-37. CHEN K W.Flexural Performance Experiment of Pretensioned Spun Nodular Concrete Piles[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(7):33-37.
    再生混凝土梁開裂彎矩的修正計算
    再生混凝土梁開裂彎矩的修正計算
    • 陳旭勇1,張智鑫1,吳巧云1,樊建平2,趙日煦3
    2021年第7期
    摘要
    引用本文
    摘 ? 要:為研究再生混凝土梁的抗裂性,對不同骨料類型(Ⅰ類再生骨料和Ⅱ類再生骨料)及不同再生骨料取代率(50%、70%和100%)的再生混凝土梁進行了數值仿真模擬,并將開裂彎矩的數值模擬結果與規范計算值進行了對比分析。結果表明:與天然混凝土梁相比,再生混凝土梁的開裂彎矩偏小,其中Ⅱ類再生混凝土梁的開裂彎矩降幅最大,說明現行GB 50010—2010《混凝土結構設計規范》中的開裂彎矩計算方法用于再生混凝土梁的開裂彎矩計算誤差較大。此外,在考慮再生骨料類型及骨料取代率對開裂彎矩影響的基礎上,提出了再生混凝土梁開裂彎矩的修正公式,通過該修正公式計算所得的開裂彎矩值與試驗值吻合較好,證明該公式適用于再生混凝土梁的開裂彎矩計算。 Abstract: In order to study the crack resistance of recycled-aggregate concrete beams, based on experimental test data, numerical simulation of beams of varied aggregate types (Type Ⅰ recycled aggregates and Type Ⅱ recycled aggregates) and varied aggregate substitution rates (50%, 70% and 100%) was performed, and the simulation result was futher compared with the values calculated by the design code. The results show that: the cracking moment of recycled-aggregate concrete beams is smaller than that of natural concrete beams, where the cracking moment of Type Ⅱ recycled-aggregate concrete beams decreases most significantly. This implies that the current highway bridge code cannot be directly applied to the cracking moment calculation of recycled-aggregate concrete beams. Moreover, the corrected formulas for cracking moment calculation of recycled-aggregate concrete beams are proposed, which take into account the influence of aggregate type and aggregate substitution rate on cracking moment. The values calculated by the corrected formulas agree with the values from experimental testing very well, which therefore validates that the proposed formulas are more suitable for the cracking moment calculation of recycled-aggregate concrete beams.
    陳旭勇,張智鑫,吳巧云,等.再生混凝土梁開裂彎矩的修正計算[J].混凝土與水泥制品,2021(7):38-42. CHEN X Y,ZHANG Z X,WU Q Y,et al.Correction of Cracking Moment Calculation of Recycled-aggregate Concrete Beams[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(7):38-42.
    生態型混凝土人工魚礁研究進展
    生態型混凝土人工魚礁研究進展
    • 姜傳勝1,梅敬松2,劉志勇2
    2021年第7期
    摘要
    引用本文
    摘 ? 要:分析了混凝土人工魚礁的國內外研究及應用進展,提出了以透水混凝土和植生混凝土為基礎的新型生態魚礁混凝土方案,制備了具有較高孔隙率和特定表面性質的生態型魚礁混凝土,可為海洋生物附著生長提供有利環境。通過將自主研發的增韌水性環氧涂層鋼筋應用到人工魚礁骨架上,有效緩解了鋼筋由于氯離子侵蝕而產生的銹蝕問題,從而大大提高了魚礁結構的安全性和耐久性。此外,在礁型設計方面,采用混凝土管狀堆積模型,輔以離心成型工藝進行設計。 Abstract: The research and application progress of concrete artificial reef at home and abroad are analyzed, and a new design scheme of concrete for ecological reef based on permeable concrete and vegetation concrete is put forward. The ecological reef concrete with higher porosity and specific surface properties is prepared, which provides a favorable environment for the attachment and growth of marine organisms. At the same time, the self-developed toughened epoxy-coated steel bar is applied to the artificial reef structure, which can effectively overcome the problem of severe corrosion of the steel bar caused by the corrosion of chloride ions, so as to greatly improve the durability and safety of the structure. In addition, a concrete tubular accumulation model is proposed, supplemented by a suitable molding process to construct a new ecological concrete artificial reef.
    姜傳勝,梅敬松,劉志勇.生態型混凝土人工魚礁研究進展[J].混凝土與水泥制品,2021(7):43-46. JIANG C S,MEI J S,LIU Z Y.Research Progress of Ecological Concrete Artificial Reef[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(7):43-46.
    上一頁
    1

    關注《混凝土與水泥制品》

    總訪問量 468,401   網站統計

    官方微信公眾號關閉
    蘇州混凝土水泥制品研究院有限公司

    關于我們    |    聯系我們    |    訂購雜志    |    回到頂部

    版權所有:中國混凝土與水泥制品網  蘇ICP備10086386號   網站建設:中企動力 蘇州

    版權所有:中國混凝土與水泥制品網

    蘇ICP備10086386號

    網站建設:中企動力 蘇州

    国产偷窥摄综合色区
      <table id="qrkot"><ruby id="qrkot"></ruby></table>
    1. <acronym id="qrkot"></acronym>
    2. <tr id="qrkot"><s id="qrkot"></s></tr>
    3. <table id="qrkot"><option id="qrkot"></option></table>
    4. <big id="qrkot"><ruby id="qrkot"></ruby></big>
    5. <track id="qrkot"></track>