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

混合配筋预应力混凝土管桩（PRC桩）受弯承载力计算

王清1，匡红杰1，路曈2，王维1，田寅1，许星1

2022年第8期

摘要

引用本文

摘要：基于平截面假定和混凝土应力与应变关系，根据平衡条件推导出了混合配筋预应力环形截面构件正截面受弯承载力理论计算方法，结合混合配筋预应力混凝土管桩（PRC桩）算例，将理论计算方法与GB 50010—2010《混凝土结构设计规范（2015年版）》中的计算方法进行了比较，两者吻合程度较好，表明将GB 50010—2010中分列的两个公式叠加后得到的配筋公式适用于PRC桩的受弯承载力计算。 Abstract: Based on the plane section assumption and the relationship between concrete stress and strain, the theoretical formula method of flexural capacity of normal section of prestressed and reinforced circular section component is deduced according to the equilibrium conditions. Combined with the calculation example of prestressed and reinforced concrete piles(PRC pile) and prestressed high-stressed concrete pile(PHC pile), the calculation results of the theoretical formula meothod are compared with the GB 50010—2010 Code for Design of Concrete Structure, the coincidence degree of the two is good, which shows that the formula obtained by superposition of the two formulas listed in GB 50010—2010 is suitable for the calculation of flexural capacity of PRC piles.

王清,匡红杰,路曈,等.混合配筋预应力混凝土管桩（PRC桩）受弯承载力计算[J].混凝土与水泥制品,2022(8):41-44. WANG Q,KUANG H J,LU T,et al.Calculation of Flexural Bearing Capacity of Prestressed and Reinforced Concrete Piles(PRC Piles)[J].China Concrete and Cement Products,2022(8):41-44.

预应力钢绞线混凝土复合配筋柱抗震性能数值分析

汪亮召1,2，金振奋2，龚顺风1，俞晓东3

2022年第8期

摘要

引用本文

摘要：采用预应力钢绞线和普通钢筋复合配筋形式，提出了一种全装配式预应力钢绞线混凝土复合配筋柱（PSRC柱），并采用DIANA有限元分析软件进行了拟静力试验数值模拟，通过1组普通钢筋混凝土柱模型和3组预应力钢绞线混凝土复合配筋柱模型的对比，分析了在不同轴压比下各构件的滞回曲线、骨架曲线、水平承载力、刚度退化、延性和耗能能力。结果表明：配置了预应力钢绞线的PSRC柱有着较好的水平承载力和延性，构件的残余位移较小，整体抗震性能良好；随着轴压比增大，构件的延性降低，耗能能力减弱。 Abstract： A new type of fully assembled prestressed steel strand concrete composite reinforcement column (PSRC column) was proposed, which adopts the form of prestressed steel strand and ordinary steel composite reinforcement. The DIANA finite element analysis software was used to simulate the quasi-static test, and 1 group of ordinary reinforced concrete column models and 3 groups of prestressed steel stranded concrete composite reinforced column models were created and compared. The hysteresis curve, skeleton curve, horizontal bearing capacity, stiffness degradation, ductility and energy consumption capacity of each component under different axial pressure ratios were analyzed. The results show that the PSRC column equipped with prestressed steel strand has good horizontal bearing capacity and ductility, the residual displacement of the component is small, and the overall seismic performance is good. With the increase of the axial pressure ratio, the ductility of the component is reduced, and the energy consumption capacity is weakened.

汪亮召,金振奋,龚顺风,等.预应力钢绞线混凝土复合配筋柱抗震性能数值分析[J].混凝土与水泥制品,2022(8):45-49. WANG L Z,JIN Z F,GONG S F,et al.Seismic Numerical Simulation Analysis of Prestressed Steel Strand Reinforced Concrete Composite Columns[J].China Concrete and Cement Products,2022(8):45-49.

预制混凝土楼板抗震设计方法研究

于婷1,2，张敬书1,2，张广平3，孙先磊3

2022年第8期

摘要

引用本文

摘要：介绍了预制混凝土楼板抗震设计方法，并进行了案例验算。结果表明，目前预制混凝土楼板的水平力设计值由于考虑了高阶振型的作用总体较安全，但底层楼板的水平力设计值偏于危险，应适当加强；预制混凝土楼板在水平地震力作用下的内力计算采用水平深梁模型，简化了连接节点的受力情况；当处于地震烈度较大地区时，结构发生非线性变形并耗散部分能量，导致荷载的竖向分布呈非三角形线性分布。 Abstract： The evolution of seismic design method of precast concrete floor slabs are introduced and a case check is carried out. The results show that the calculation methods of horizontal design force of precast concrete floor slabs takes into account the role of high-order vibration modes, and the design value is relatively safe, but the design value of the ground floor is dangerous and should be properly strengthened. The horizontal deep beam model is used to calculate the internal force of precast concrete floor slabs under horizontal earthquake, which simplifies the stress of floor connections. When the height and seismic intensity of the structure are large, the structure will undergo nonlinear deformation and dissipate part of the energy, so that the vertical distribution of load is not triangular linear distribution.

于婷,张敬书,张广平,等.预制混凝土楼板抗震设计方法研究[J].混凝土与水泥制品,2022(8):50-55. YU T,ZHANG J S,ZHANG G P,et al.Study on Seismic Design Method of Precast Concrete Floor Slabs[J].China Concrete and Cement Products,2022(8):50-55.

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