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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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    房建材料及制品

    新型預制低層裝配式剪力墻抗震性能試驗研究
    新型預制低層裝配式剪力墻抗震性能試驗研究
    • 趙陽1,王二成1,2,孔德昭3,孔德鵬3,李彥蒼1,2
    2021年第2期
    摘要
    引用本文
    摘 ? 要:提出了一種適用于低層建筑的裝配式剪力墻結構,并對3個足尺預制剪力墻試件進行了低周往復加載試驗。結果表明:在合理范圍內增加軸壓比, 墻體的承載力有明顯提高,兩個試件都是延性破壞,延性和耗能能力均有所增強;減小剪跨比會使墻體開裂荷載和原始剛度變大,但延性變差, 水泥砂漿層出現脆性破壞。 Abstract: A prefabricated shear wall structure for low rise buildings was put forward, low cyclic loading experiments were conducted on three full-scale precast shear wall specimens. The results show that with the increase of axial pressure ratio, the bearing capacity of the low-rise precast concrete shear wall specimen can be enhanced obviously. Two walls are ductile failure and the ductility and energy consumption capacity are slightly enhanced. Reduction of shear span ratio of wall can improve the cracking performance and initial stiffness, which can obviously reduce the ductility of the wall, and the shear slip failure of the cement mortar is produced.
    趙陽,王二成,孔德昭,等.新型預制低層裝配式剪力墻抗震性能試驗研究[J].混凝土與水泥制品,2021(2):69-73. ZHAO Y,WANG E C,KONG D Z,et al.Experimental Research on Seismic Performance of New Low-rise Precast Concrete Shear Walls[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(2):69-73.
    雙重耗能搖擺桁架-鋼框架結構體系的抗震性能分析
    雙重耗能搖擺桁架-鋼框架結構體系的抗震性能分析
    • 仝強1,葉曉康1,2,常軍1
    2021年第2期
    摘要
    引用本文
    摘 ? 要:為了提高結構的抗震性能,提出了一種雙重耗能搖擺桁架-鋼框架結構體系,即在搖擺桁架和鋼框架連接處安裝黏滯阻尼器,并在桁架底部設置自復位支撐(SCED)。建立了該系統的數值模型,并與搖擺桁架-鋼框架對比分析,以研究其在地震下的抗震性能。結果表明:黏滯阻尼器在地震作用下充分發揮耗能能力,自復位支撐在地震作用下的殘余應變基本為零,并能為結構提供足夠的自復位能力,結構的抗震性能得到了很大提高。 Abstract: To improve the seismic performance of the structure, a double energy consumption rocking truss-steel frame structure system is put forward, that is, dampers are installed at the connection between the rocking truss and the steel frame, and self-centering energy dissipates (SCED) are equipped at the bottom of the truss. The numerical model of the system is established and compared with the rocking truss-steel frame to study its seismic performance. The results show that the viscous dampers fully exert its energy dissipation capacity, and the residual strain of SCED is close to zero, which can provide sufficient self-centering capability for the structure and improve structural seismic performance. ?
    仝強,葉曉康,常軍.雙重耗能搖擺桁架-鋼框架結構體系的抗震性能分析[J].混凝土與水泥制品,2021(2):74-78. TONG Q,YE X K,CHANG J.Seismic Performance Analysis of Double Energy Dissipation Rocking Truss-steel Frame Structure System[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(2):74-78.
    早齡期普通混凝土直剪性能及損傷耗能分析
    早齡期普通混凝土直剪性能及損傷耗能分析
    • 劉杰,吳輝琴,陳宇良,晏方
    2021年第2期
    摘要
    引用本文
    摘 ? 要:為了研究早齡期普通混凝土直剪作用下的力學性能,完成了12個普通混凝土試件的直剪試驗,獲取了試件的破壞形態及直剪荷載-位移全過程曲線,分析了直剪作用下齡期對普通混凝土直剪強度、峰值變形、變形模量、損傷演變、能量耗散等力學特征參數的影響規律。結果表明:齡期越長,受剪荷載-變形曲線上升段越陡峭;當齡期≤3 d時,混凝土斷面剪切破壞形態為骨料與水泥基體之間界面的黏結破壞,當齡期≥7 d時,剪切破壞形態為骨料與水泥基體之間界面的黏結破壞與粗骨料本身的剪斷破壞;隨著齡期的延長,普通混凝土試件的峰值剪切變形減小,直剪強度、變形模量和能量耗散系數增大,混凝土損傷的出現變晚。 Abstract: In order to study the mechanical properties of ordinary concrete at early age under direct shear, a total of 12 test blocks were designed and completed for the direct shear. The failure patterns and direct shear load-displacement process curves of the specimens were obtained, and the influence rules of mechanical properties such as shear strength, peak deformation, deformation modulus, damage evolution and energy dissipation of ordinary concrete were analyzed at different ages under direct shear. The results show that the longer the age, the steeper the rising section of the shear load-deformation curve. When the age is less than or equal to 3 d, the shear failure of the concrete section is the bond failure between the aggregate and the cement matrix. When the age is greater than 7 d, the shear failure form is the bond failure of the interface between the aggregate and the cement matrix and the shear failure of the coarse aggregate. As the age increases, the peak shear deformation of the ordinary concrete specimen decreases, the shear strength, deformation modulus and energy dissipation coefficient increase, and the appearance of concrete damage becomes later.
    劉杰,吳輝琴,陳宇良,等.早齡期普通混凝土直剪性能及損傷耗能分析[J].混凝土與水泥制品,2021(2):79-83. LIU J,WU H Q,CHEN Y L,et al.Analysis of Direct Shear Performance and Damage Energy Consumption of Ordinary Concrete at Early Age[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(2):79-83.
    PVA-ECC薄板四點彎曲有限元分析
    PVA-ECC薄板四點彎曲有限元分析
    • 周超1,張黎飛2,劉波1,郭亞芳1
    2021年第2期
    摘要
    引用本文
    摘 ? 要:利用有限元軟件建立了聚乙烯醇纖維增強超高韌性水泥基復合材料(PVA-ECC)薄板四點彎曲的有限元模型,并與已有PVA-ECC薄板四點彎曲試驗進行比較,驗證了有限元模型的有效性。從單元選取、材料屬性定義、網格劃分、接觸定義、施加邊界條件、荷載等方面闡述了有限元建模過程,為后續PVA-ECC有限模型的建立提供一定的參考。 Abstract: The finite element model of four point bending of polyvinyl alcohol fiber reinforced ultra-high toughness cementitious composites(PVA-ECC)thin plate is established by general finite element software. The simulation results are found to be in good agreement with test results, which indicaes that the finite element model is reasonably accurate in simulating the flexural behaviors of PVA-ECC thin plates. The finite element modeling process is described in detail from the aspects of element selection, material definition, meshing, contact definition, boundary conditions and loading, which provides a reference for the subsequent establishment of PVA-ECC finite element model.
    周超,張黎飛,劉波,等.PVA-ECC薄板四點彎曲有限元分析[J].混凝土與水泥制品,2021(2):84-86. ZHOU C,ZHANG L F,LIU B,et al.Finite Element Analysis of Four Point Bending of PVA-ECC Thin Plates[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(2):84-86.
    超低能耗預制混凝土夾心保溫墻板拉結件熱工性能分析
    超低能耗預制混凝土夾心保溫墻板拉結件熱工性能分析
    • 趙志剛1,呂安安2,楊思忠3,任成傳1,常世濤1,董鐵良1,孫波1
    2021年第2期
    摘要
    引用本文
    摘 ? 要:試驗研究了保溫層厚度為250 mm夾心保溫墻板的熱工性能。結果表明:常規保溫材料厚度為250 mm時,采用不銹鋼桁架或夾形和限位拉結件組合等方式,夾心保溫墻板的傳熱系數可以達到寒冷地區超低能耗外圍護墻體的要求;相比FRP拉結件,金屬拉結件會產生更大的熱橋效應,對預制夾心保溫墻板的傳熱系數有較大影響;隨著拉結件傳熱通道的增加,相近穿透率的金屬拉結件對傳熱系數的影響增大。 Abstract: The thermal properties of 250 mm insulation layer thickness sandwich panels were studied. The results show that when the thickness of common insulation layer is 250 mm, the heat transfer coefficient of sandwich panels can meet the ultra-low energy consumption requirements of peripheral wall in cold area by using stainless steel truss or combination of clip and restraint connectors. Compared with FRP, metal connectors can produce a greater thermal bridge effect, which has a greater impact on the heat transfer coefficient of sandwich panels. With the increase of the heat transfer channel of the metal connectors, the influence of metal connectors with similar penetration rate on the heat transfer coefficient increases.
    趙志剛,呂安安,楊思忠,等.超低能耗預制混凝土夾心保溫墻板拉結件熱工性能分析[J].混凝土與水泥制品,2021(2):87-90. ZHAO Z H,LYU A A,YANG S Z,et al.Analysis on Thermal Performance of Insulation Connectors of Ultra-low Energy Consumption Precast Concrete Sandwich Panels[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(2):87-90.
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