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    蘇州混凝土水泥制品研究院有限公司

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    發布時間:2020-01-06 00:00:00
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    水泥混凝土制品

    復合配筋預制混凝土管樁的抗彎抗剪性能試驗研究
    復合配筋預制混凝土管樁的抗彎抗剪性能試驗研究
    • 劉雨松1,陳 剛2,3,徐銓彪2,3,龔順風1,俞曉東4,劉承斌1
    2021年第4期
    摘要
    引用本文
    摘 ?要:為進一步推廣先張法預應力離心混凝土鋼絞線樁(PSC樁)在高烈度抗震區的應用,在PSC樁中加入與鋼絞線相同數量的螺紋鋼筋,研發了先張法預應力離心混凝土復合配筋鋼絞線樁(PSRC樁),并對3種規格共12根管樁試件進行了足尺抗彎及抗剪性能試驗,對比分析了PSC樁和PSRC樁在抗裂性能、抗彎(剪)承載力、變形能力及裂縫分布等方面的異同。試驗結果表明:非預應力鋼筋的配置對管樁抗裂性能影響不大,但可以提高管樁的抗彎和抗剪性能;PSRC樁的開裂彎矩和開裂剪力與PSC樁相近,但極限彎矩和極限剪力則分別提高了約55%和20%;與PSC樁相比,PSRC樁破壞時樁身裂縫數量較多,分布范圍較廣,但最大裂縫寬度較小。 Abstract: In order to further popularize the application of PSC piles in high intensity seismic areas, the same number of deformed steel bars as steel strands were added to PSC piles, and pretensioned centrifugal spun concrete piles with hybrid steel strands and reinforcing bars (PSRC piles) were developed. Through the bending and shear tests on twelve full-scale pile test specimens with three kinds of specifications, the differences of crack resistance, bending and shear bearing capacity, deformation capacity and crack distribution between PSC and PSRC piles were studied. The experiment results show that the arrangement of non-prestressing tendons has little effect on the crack resistance of piles, but can enhance the bending and shear bearing capacity. The cracking moment and shear force of PSRC piles are close to those of PSC piles, but the ultimate bending moment and shear force are about 55% and 20% higher, respectively. The non-prestressing tendons can also limit the crack development in pile body, the number of cracks for PSRC piles at failure is larger, the crack distribution is wider, but the maximum crack width is smaller.
    劉雨松,陳剛,徐銓彪,等.復合配筋預制混凝土管樁的抗彎抗剪性能試驗研究[J].混凝土與水泥制品,2021(4):36-41. LIU Y S,CHEN G,XU Q B,et al.Experimental Study on Flexural and Shear Performance of Precast Concrete Piles with Composite Reinforcement[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(4):36-41.
    小口徑混凝土排水管密封膠圈的設計研究
    小口徑混凝土排水管密封膠圈的設計研究
    • 侯 雷,談維漢
    2021年第4期
    摘要
    引用本文
    摘 ? 要:為解決實際工程中小口徑混凝土排水管的連接質量問題,通過排水管對接連接和內水壓力試驗,建立了不同硬度、不同壓縮率密封膠圈與排水管對接安裝難易程度及質量的關系,并針對實際工程,提出了合理的改進意見,以期為提高小口徑混凝土排水管的對接安裝質量提供參考。 Abstract: In order to solve the connection problems of small diameter concrete sewer pipe in practical engineering, through pipe interface connection and internal water pressure tests, the relationships between different hardness, different compression ratio of rubber gasket ring and pipe installation queality were established, and reasonable improvement suggestions were put forward for practical engineering, so as to provide a reference for improving the installation quality of small diameter concrete sewer pipe project.
    侯雷,談維漢.小口徑混凝土排水管密封膠圈的設計研究[J].混凝土與水泥制品,2021(4):42-44. HOU L,TAN W Q.Design of the Rubber Gasket Ring for Concrete Sewer Pipes[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(4):42-44.
    再生骨料混凝土在裝配式住宅構件中的應用
    再生骨料混凝土在裝配式住宅構件中的應用
    • 吳永杰,楊玉啟,趙利輝,呂麗萍,岳慧麗
    2021年第4期
    摘要
    引用本文
    摘 ? 要:為促進廢棄混凝土建筑垃圾資源化利用,選擇Ⅱ類再生骨料,分別以20%、30%和40%比例取代粗骨料,通過系統的配合比設計,確定了再生骨料摻量和生產用配合比,并結合實際工程,通過原材料質量和生產工藝控制,成功應用于裝配式住宅用混凝土構件的生產。 Abstract: In order to promote the resource utilization of waste concrete construction waste, class Ⅱ recycled aggregate was selected, and the replacement rates 20%, 30% and 40% of coarse aggregate were used respectively. Through systematic mix proportion design, the content of recycled aggregate and mix proportion for production were determined. Combined with the actual project, the control of raw material quality and production process were carried out to produce the prefabricated components successfully.
    吳永杰,楊玉啟,趙利輝,等.再生骨料混凝土在裝配式住宅構件中的應用[J].混凝土與水泥制品,2021(4):45-48. WU Y J,YANG Y Q,ZHAO L H,et al.Application of Recycled Aggregate Concrete in Prefabricated Components[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(4):45-48.
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