房建材料及制品_2022_《混凝土与水泥制品》杂志社

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发布时间：2020-01-06 00:00:00

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房建材料及制品

GFRP筋和纤维增强混凝土板的抗弯性能研究

肖良丽，孙帆樯，周翔，杨曌

2022年第12期

摘要

引用本文

摘要：研究了玄武岩纤维（BF）掺量对掺沙漠砂混凝土抗压强度、单轴受压应力-应变曲线、劈裂抗拉强度和弹性模量的影响。结果表明：BF对掺沙漠砂混凝土的抗压强度和弹性模量影响较小；掺沙漠砂混凝土的劈裂抗拉强度随着BF掺量的增加呈先增大后减小的趋势，BF最佳掺量为0.4%；BF掺沙漠砂混凝土的应力-应变曲线发展规律与普通混凝土类似；采用普通混凝土的弹性模量计算公式能较准确地计算出BF掺沙漠砂混凝土的弹性模量。 Abstract: The effects of basalt fiber(BF) content on compressive strength, uniaxial compression stress-strain curve, splitting tensile strength and elastic modulus of concrete mixed with desert sand were studied. The results show that BF has a little effect on the compressive strength and elastic modulus of concrete mixed with desert sand. The splitting tensile strength of concrete with desert sand increases first and then decreases with the increase of BF content, and the optimum BF content is 0.4%. The stress-strain curve of BF concrete mixed with desert sand is similar to that of ordinary concrete. The elastic modulus of BF concrete mixed with desert sand can be calculated accurately by using the elastic modulus formula of ordinary concrete.

肖良丽,孙帆樯,周翔,等.GFRP筋和纤维增强混凝土板的抗弯性能研究[J].混凝土与水泥制品,2022(12):62-66. XIAO L L,SUN F Q,ZHOU X,et al.Flexural Performance of Concrete Slabs Reinforced with GFRP Bars and Fiber[J].China Concrete and Cement Products,2022(12):62-66.

泡沫混凝土复配发泡剂配合比试验研究

孙迪1，陶子程1，马杨2，吴学红3，潘鹏飞1，杜俊松1，陈明秀1，杨建平1

2022年第12期

摘要

引用本文

摘要：通过试验确定了不同发泡剂（阴离子型表面活性剂F01、非离子型表面活性剂F02、表面活性剂F03、蛋白质发泡剂F04、表面活性剂F05）和稳泡剂W01的最佳稀释倍率范围，从而优选出了合适的发泡剂类型。基于此，通过正交试验研究了发泡剂和稳泡剂的稀释倍率对发泡效果和稳泡能力的影响，得到了不同发泡剂与稳泡剂的最佳稀释倍率，并给出了最佳复配比例。结果表明：发泡剂F02、F03、F04和稳泡剂W01的最佳稀释倍率分别为70、80、120和150，最佳复配比例（质量比）为14.3∶12.5∶8.3∶6.7。 Abstract: The optimal dilution ratio range of different foaming agents (anionic surfactant F01, non-ionic surfactant F02, surfactant F03, protein foaming agent F04, surfactant F05) and foam stabilizing agent W01 was determined through experiments, and the appropriate type of foaming agents was selected. Based on this, the influence of the dilution ratio of foaming agents and foam stabilizing agent on the foaming effect and foam stability was studied through orthogonal test, and the optimal dilution ratio of different foaming agents and foam stabilizing agent was obtained, and the optimal compounding ratio was given. The results show that the optimal dilution ratios of foaming agent F02, F03, F04 and foam stabilizing agent W01 are 70, 80, 120 and 150 respectively, and the optimal compounding ratio (mass ratio) is 14.3∶12.5∶8.3∶6.7.

不同配箍率混凝土叠合梁静力性能有限元分析

邓鑫1，任云2

2022年第12期

摘要

引用本文

摘要：通过单调荷载下的缩尺模型试验研究了不同配箍率混凝土叠合梁的静力性能，选择合适的本构模型及边界性质进行了ABAQUS模拟与试验对比。其中，叠合梁分为预制段和现浇段，整浇梁作为对比试件。结果表明：相同配箍率下，叠合梁较整浇梁更易发生剪切破坏，叠合梁的延性较整浇梁有所降低；提高配箍率可提高叠合梁的延性；ABAQUS模拟结果与试验结果的吻合度较高。可为设计高性能叠合梁提供依据。 Abstract: The static performance of concrete composite beams with different stirrup ratios was studied by scale model test under monotonic loads, and the appropriate constitutive model and boundary properties were selected for ABAQUS simulation and compared with tests. The composite beams were divided into prefabricated sections and cast-in-place sections, and the cast-in-place beams were used as the comparison member. The results show that the composite beam is more likely to undergo shear failure than the cast-in-place beam at the same stirrup ratio, and the ductility of the composite beam is reduced compared to the cast-in-place beam. Increasing the stirrup ratio can improve the ductility of composite beam. The ABAQUS simulation results are in good agreement with the test results. The research results can provide a basis for the design of high performance composite beams.

邓鑫,任云.不同配箍率混凝土叠合梁静力性能有限元分析[J].混凝土与水泥制品,2022(12):72-75. DENG X,REN Y.Finte Element Analysis on Static Performance of Concrete Composite Beams with Different Stirrup Ratio[J].China Concrete and Cement Products,2022(12):72-75.

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