房建材料及制品_2021_《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

配筋超高性能混凝土（UHPC）梁弯曲试验研究

高育欣，朱文凯，罗遥凌，杨文，谢昱昊，闫欣宜

2021年第7期

摘要

引用本文

摘要：开展了2根超高性能混凝土（UHPC）梁和1根钢筋混凝土（RC）梁的对比试验研究，得到了3根构件的承载力-挠度曲线、裂缝开展图和跨中截面应变图。结果表明：UHPC梁的受力过程可分为弹性阶段、裂缝开展阶段、屈服阶段和完全破坏阶段；钢纤维可以防止构件发生斜拉破坏；UHPC梁具有刚度大和延性大的特点；UHPC梁的开裂荷载高于RC梁，正截面承载力计算时不能忽略UHPC的抗拉强度。 Abstract: The comparative experimental study of two ultra-high performance concrete(UHPC) beams and one reinforced concrete(RC) beam was carried out, and the bearing capacity deflection curves, crack development diagrams and midspan section strain diagrams of the three members were obtained. The results show that the failure process of UHPC beam can be divided into elastic stage, crack development stage, yield stage and complete failure stage. Steel fiber can prevent the component from cable-stayed failure. UHPC beams have the advantages of high stiffness and good ductility. The cracking load of UHPC beam is higher than that of RC beam, and the tensile strength of UHPC cannot be ignored in the calculation of normal section bearing capacity.

高育欣,朱文凯,罗遥凌,等.配筋超高性能混凝土（UHPC）梁弯曲试验研究[J].混凝土与水泥制品,2021(7):67-70. GAO Y X,ZHU W K,LUO Y L,et al.Research on Bending Behavior of Reinforced Ultra-high Performance Concrete （UHPC） Beams[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(7):67-70.

缺陷对灌浆套筒接头连接性能影响的试验研究

孟文清1，赵凯1，刘爽2，张亚鹏1，陈飞飞2

2021年第7期

摘要

引用本文

摘要：选用4种不同尺寸、材质的全灌浆套筒，人为设置缺陷，通过对接头进行单向拉伸试验，研究了缺陷对不同尺寸、材质灌浆套筒接头强度和变形性能的影响。结果表明：内端部缺陷长度3d为接头钢筋拉断和钢筋拔出的临界值，当缺陷长度≤3d时，接头钢筋被拉断，且强度符合规范要求；无缺陷时，相同材质套筒，内径越大，接头对钢筋延性的影响越小；相同尺寸套筒，钢制灌浆套筒接头的抗拉强度和最大拉力下的总伸长率高于球墨铸铁接头；当缺陷长度为4d时，3种钢制套筒接头的抗拉强度和最大拉力下的总伸长率均小于球墨铸铁套筒接头。 Abstract: Four kinds of full grouting sleeves from different manufacturers were selected, and the defects were artificially set, and the effects of defects on the strength and deformation performance of grouting sleeve joints of different sizes and materials were studied through uniaxial tensile tests on the joints. The results show that the length of the inner end defect 3d is the critical value of the joint reinforcement and the rebar pullout. When the defect length is less than or equal to 3d, the joint reinforcement is broken, and the strength meets the specification requirements. When there is no defect and the sleeve material is the same, the larger the inner diameter, the smaller the influence of the joint on the ductility of the steel bar. When the sleeve size is the same, the tensile strength and the total elongation under the maximum force of steel grouting sleeve joint are higher than those of the ductile iron joint. When the defect length is 4d, the tensile strength and the total elongation under maximum force of the three types of steel sleeve joints are less than those of ductile iron sleeve joints.

孟文清,赵凯,刘爽,等.缺陷对灌浆套筒接头连接性能影响的试验研究[J].混凝土与水泥制品,2021(7):71-75. MENG W Q,ZHAO K,LIU S,et al.Experimental Research on Influence of Defects on the Connection Performance of Grouting Sleeve Joints[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(7):71-75.

水热合成硅酸盐骨料及其自保温砌块制备

陈胜强1,2，周祎1，李国旺1，翟祝贺1，陈红军1

2021年第7期

摘要

引用本文

摘要：以粒径0.5~1.0 mm的膨胀珍珠岩作为成型核，电石渣、粉煤灰、水泥、石膏、膨胀珍珠岩细粉等为基材，经混合搅拌制成混合料。采用成球盘制作直径为5~10 mm的球型骨料，静置养护后送入蒸压釜，在温度为180 ℃、压力为1 MPa的蒸压养护条件下发生水热合成反应，研制出了水热合成硅酸盐骨料。结果表明：利用研制出的堆积密度为715 kg/m3、筒压强度为12.8 MPa的人造硅酸盐骨料可以生产出各项性能满足GB/T 15229—2011《轻集料混凝土小型空心砌块》MU5.0级要求的自保温砌块。

陈胜强,周祎,李国旺,等.水热合成硅酸盐骨料及其自保温砌块制备[J].混凝土与水泥制品,2021(7):76-79. CHEN S Q,ZHOU Y,LI G W,et al.Hydrothermal Synthesis of Silicate Aggregate and Preparation of Self-insulating Blocks[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(7):76-79.

新型装配式拱形连梁节点抗震性能试验研究

王坦，袁帅锋，罗坤，袁阔，李立巍，马先前，郝银龙，刘俊

2021年第7期

摘要

引用本文

摘要：在文献调研的基础上，提出了一种新型装配式拱形连梁节点，并通过试验和有限元方法分析了此种节点的抗震性能。结果表明：拱形连梁和型钢连接件可以有效提高连梁端部的抗剪承载能力，提高联肢墙结构的整体抗震性能。 Abstract: On the basis of literature research, a new type of assembled arch beam joint was put forward, and its seismic performance was analyzed through experiment and finite element method. The results show that the arch girder and section steel connectors can effectively improve the shear bearing capacity of the end of the girder, and improve the overall seismic performance of the joint wall structure.

王坦,袁帅锋,罗坤,等.新型装配式拱形连梁节点抗震性能试验研究[J].混凝土与水泥制品,2021(7):80-83,87. WANG T,YUAN S F,LUO K,et al.Experimental Study on Seismic Performance of New Fabricated Arch Beam Joints[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(7):80-83,87.

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