水泥混凝土制品_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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水泥混凝土制品

纤维混凝土加固装配式框架结构体系节点性能分析

毛会敏1a，颜学渊2，刘旭宏1b，陈伟宏2，杨国3

2022年第10期

摘要

引用本文

摘要：进行了纤维混凝土加固装配式框架结构体系梁柱节点低周往复加载有限元模拟分析，得到了试件的破坏形态、滞回曲线。结果表明：节点的主要受损区域为梁端键槽区，采用纤维混凝土置换受损区域的混凝土可有效加固节点。其中，当采用聚丙烯纤维混凝土加固时，能恢复节点的抗震性能；当采用钢纤维混凝土、钢-聚丙烯纤维混凝土加固时，不仅可以恢复节点的抗震性能，还可以在一定程度上提高节点的抗震性能。 Abstract: The numerical method was adoptted to simulate the low-frequency cyclic loading of beam column joints of fiber reinforced concrete reinforced prefabricated frame structure system, and the failure patterns and hysteretic curves of the specimens were obtained. The results show that the main damaged area of the joint is the keyway area at the beam end, and using fiber reinforced concrete to replace the concrete in the damaged area can effectively strengthen the joint. When polypropylene fiber reinforced concrete is used to reinforce the joint, the seismic performance of the joint can be completely restored. When steel fiber reinforced concrete and steel-polypropylene fiber reinforced concrete are used to reinforce the joint, the seismic performance of the joint can not only be restored, but also be improved to a certain extent.

毛会敏,颜学渊,刘旭宏,等.纤维混凝土加固装配式框架结构体系节点性能分析[J].混凝土与水泥制品,2022(10):54-59. MAO H M,YAN X Y,LIU X H,et al.Performance Analysis of the Joints in Prefabricated Frame Structure System Strengthened with Fiber Reinforced Concrete[J].China Concrete and Cement Products,2022(10):54-59.

CFRP约束钢筋混凝土方柱轴压承载力模型研究

王帮康1，周理1,2，郭广1

2022年第10期

摘要

引用本文

摘要：为精确预测碳纤维布（CFRP）约束混凝土方柱轴压承载力，考虑混凝土方柱中不同区域约束效应的差异，将承载力贡献项离散为四项（纵向钢筋、无侧限区混凝土、CFRP约束区混凝土、箍筋及CFRP共同约束区混凝土），基于此建立了CFRP约束混凝土方柱轴压承载力预测模型，并与收集的84个CFRP约束混凝土方柱试验数据进行了对比验证。结果表明：建立的模型用于预测CFRP约束混凝土方柱轴压承载力较其他模型更接近试验值，且可靠性较高；模型约束比和圆角半径与预测值呈正相关。 Abstract: In order to accurately predict the axial compression bearing capacity of square concrete columns restrained by carbon fiber reinforced plastics (CFRP)， taking the consideration of the difference in restraint effect of different regions of concrete columns. The contribution of the bearing capacity can be divided into 4 parts(the contributions of longitudinal reinforcement， unconfined concrete， concrete restrained by CFRP， and concrete restrained by CFRP and hooping). Based on the above assume， a new model of the axial compression bearing capacity of square concrete columns confined by CFRP was established. A total of 84 experimental data were collected， and were used to verify the accuracy of the model. The results show that the calculated axial bearing capacity by using the model proposed is more accurate， which showed a higher reliability. The constraint ratio and fillet radius were positively correlated with the predicted values.

三种常见管桩自动化布料工艺特点

邹文岗，刘河青，张洋

2022年第10期

摘要

引用本文

摘要：基于管桩自动化生产水平现状，分析了三种常见的自动化布料工艺的技术特点、设备投资成本和不足，并针对性地提出了完善方案，以期为新厂或旧厂改造方案的选择提供参考。 Abstract: According to the current automatic production level of concrete piles, the technical characteristics, equipment investment cost and shortcomings of the three common automatic feeding processes are analyzed objectively, and the perfect scheme wewe put forward, which can provide references for the process selection of the new or the old factory.

邹文岗,刘河青,张洋.三种常见管桩自动化布料工艺特点[J].混凝土与水泥制品,2022(10):45-48. ZOU W G,LIU H Q,ZHANG Y.Study on Characteristics of Three Common Feeding Process for Automatic Concrete Piles[J].China Concrete and Cement Products,2022(10):45-48.

多腔钢管再生混凝土复合中长柱轴压性能研究

袁凯1，邓夕胜2，梁涛1，曾智2，朱一林2

2022年第10期

摘要

引用本文

摘要：为研究多腔钢管再生混凝土复合中长柱在受压状态下的力学性能，采用ABAQUS软件对多腔钢管中长柱在轴向压力下的荷载-位移曲线、破坏模态、受力过程进行了模拟，并研究了再生混凝土取代率和复合柱长细比对其轴压性能的影响。结果表明：多腔钢管中长柱破坏模式为弯曲破坏，外部再生混凝土和核心再生混凝土跨中截面破坏明显，核心混凝土受钢管约束承载力提高明显；随着再生混凝土取代率和长细比的增加，多腔钢管中长柱的承载能力、延性和刚度均减小，当长细比过大时，易发生失稳破坏。 Abstract: In order to study the axial compression performance of recycled concrete composite medium and long columns with multi-cavity steel tube. The load-displacement curve, failure mode and stress process of the recycled concrete composite medium and long columns with multi-cavity steel tube under axial pressure were studied by ABAQUS. The effects of replacement ratio of recycled concrete and slenderness ratio of components on load-displacement curve, ductility and stiffness of the composite miduim and long columns under axial pressure were also studied. The results show that the failure mode of recycled concrete medium and long columns with multi-cavity steel tube is bending failure, the failure of external recycled concrete and core recycled concrete in mid-span section is obvious, and the bearing capacity of core concrete is improved obviously. The bearing capacity, ductility and stiffness of recycled concrete composite medium and long columns with multi-cavity steel tube is decreased with the increase of replacement rate of recycled concrete and the slenderness ratio. The instability failure of recycled concrete composite medium and long columns with multi-cavity steel tube will occur when the slenderness ratio is too large.

袁凯,邓夕胜,梁涛,等.多腔钢管再生混凝土复合中长柱轴压性能研究[J].混凝土与水泥制品,2022(10):40-44,59. YUAN K,DENG X S,LIANG T,et al.Study on Axial Compression Performance of Recycled Concrete Composite Midium and Long Columns with Multi-cavity Steel Tubes[J].China Concrete and Cement Products,2022(10):40-44,59.

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