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

耳板式空腹桁架免支撑叠合板抗弯性能试验研究

张旭1，陈强1，庞祖杰2，孔潇1，梁艺2，王少杰1，胡兆文2

2021年第8期

摘要

引用本文

摘要：通过标准砝码重物加载方法，研究了耳板式空腹桁架免支撑叠合板未浇筑后浇混凝土层、浇筑后浇混凝土层之后且上部钢管未拆除和拆除上部钢管三个施工受力阶段的抗弯性能，明晰了叠合板在各施工受力阶段的工作机制与设计计算方法。结果表明：耳板式空腹桁架免支撑叠合板在施工受力各阶段均具有良好的抵抗开裂与变形的能力，上部钢管、后浇混凝土层均可显著提高混凝土叠合底板的抗弯刚度。研究成果可为减少或免除普通混凝土叠合底板竖向支撑的使用，提高其抗裂性能提供有效路径。 Abstract: Through the loading method of standard weights, the flexural performance of the ear plate vierendeel truss composite slab without support in three construction stress stages of the post-cast concrete layer without pouring, the post-cast concrete layer after pouring and the upper steel tube without removing and the upper steel tube is removed were studied, and the working mechanism and design calculation method of the composite slab in each construction stress stage were clarified. The results show that the ear plate vierendeel truss composite slabs without support have good resistance to cracking and deformation at all construction stages, both the upper steel tube and post-cast concrete layer can significantly improve the flexural stiffness of concrete composite slabs. The research results can provide one of the effective ways for reducing or eliminating the use of vertical bracing of common concrete composite slab and improve its crack resistance.

张旭,陈强,庞祖杰,等.耳板式空腹桁架免支撑叠合板抗弯性能试验研究[J].混凝土与水泥制品,2021(8):79-82,95. ZHANG X,CHEN Q,PANG Z J,et al.Experimental Study on Flexural Performance of Ear Plate Vierendeel Truss Composite Slab Without Support[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(8):79-82,95.

基于LS-DYNA的钢筋混凝土梁落锤冲击响应分析

廖俊智，何勇

2021年第8期

摘要

引用本文

摘要：基于LS-DYNA显示动力分析程序，对3种不同配筋梁的冲击试验进行了数值模拟，通过参数分析探究了不同落锤高度下系统总能和各部件能量在整个冲击过程中的变化规律以及不同时间下剪应力沿梁长的分布情况。结果表明：随着落锤高度增加，落锤动能与梁体内能交换会出现滞后现象，落锤高度对梁体内各部件的耗能比例没有显著影响，冲击过程中惯性效应不明显；通过分析梁体内的剪应力分布情况，揭示了梁体在冲击过程中剪应力的传播规律和落锤高度对梁体抗剪性能的影响。 Abstract: The impact tests of three different reinforced beams were simulated based on the LS-DYNA explicit dynamic analysis program, and the change law of the total energy of the system and the energy of each component during the entire impact process under different drop weight heights and the distribution of shear stress along the beam length at different times were studied through parameter analysis. The results show that with the increase of the drop weight height, the kinetic energy of the falling weight and the energy in the beam body show a hysteresis phenomenon, and the drop weight height has no significant effect on the energy consumption ratio of various components in the beam body, and the inertial effect is not obvious during the impact process. The effects of the shear stress propagation law and the drop weight height on the shear resistance of the beam during the impact process are revealed by analyzing the distribution of shear stress.

廖俊智,何勇.基于LS-DYNA的钢筋混凝土梁落锤冲击响应分析全FRP筋增强混凝土梁抗剪性能综述[J].混凝土与水泥制品,2021(8):74-78. LIAO J Z,HE Y.Analysis of Impact Response of Reinforced Concrete Beams Based on LS-DYNA[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(8):74-78.

全FRP筋增强混凝土梁抗剪性能综述

吕家美1，邸博2，何立杰2，黄柳超2

2021年第8期

摘要

引用本文

摘要：钢筋锈蚀导致混凝土结构性能下降，使用寿命缩短。纤维增强复合（FRP）筋具有高抗拉强度和优异的耐腐蚀性能，在部分结构中可代替钢筋，以提升混凝土结构的耐久性。将FRP筋应用于混凝土结构中是未来发展的重要方向，但目前关于其抗剪性能及抗剪机理尚未阐述清楚。本文对国内外关于FRP筋混凝土梁的抗剪性能研究进行了总结与分析。 Abstract: The corrosion of steel bar leads to the deterioration of the performance and the shortening of the service life of concrete structures. Fiber reinforced polymer(FRP) bars have high tensile strength and excellent corrosion resistance, and can replace steel bars in some structures to improve the durability of concrete structures. The application of FRP bars in concrete structures is an important development direction in the future. However, the shear behavior and shear mechanism of FRP reinforced concrete beams have not been explained clearly. Therefore, the research on shear behavior of FRP reinforced concrete beams at home and abroad is summarized and analyzed.

吕家美,邸博,何立杰,等.全FRP筋增强混凝土梁抗剪性能综述[J].混凝土与水泥制品,2021(8):69-73. LYU J M,DI B,HE L J,et al.Review on Shear Behavior of Concrete Beams Strengthened with FRP Bars and Stirrups[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(8):69-73.

新型EPS模块浇筑墙体受压性能试验研究

宋珊珊，李倩茹，徐晓，郝文秀，于万里

2021年第8期

摘要

引用本文

摘要：通过对4片新型EPS模块浇筑墙体进行轴心和偏心受压试验，研究了试件的破坏形态、极限承载力和变形规律。在试验基础上，利用ABAQUS软件建立了新型EPS模块浇筑墙体有限元模型，并对试件的极限承载力进行了对比分析。结果表明：新型EPS模块内存在连接桥，墙体的破坏首先出现在连接桥处，最终破坏形式为受压区混凝土破坏；随着偏心距逐渐增大，墙体的极限承载力明显降低，应变与普通混凝土墙体的变化相似；有限元分析结果与试验结果吻合良好，可为工程设计提供分析方法和理论依据。 Abstract: Four new EPS module cast-in-place walls were tested under axial compression and eccentric compression, and the failure mode, ultimate bearing capacity and deformation law of the specimens were studied. On the basis of the test, the finite element model of new EPS cast-in-place wall was established by using ABAQUS software, and the ultimate bearing capacity of the specimen was compared and analyzed. The results show that there is a connecting bridge in the new EPS module, and the wall failure first appears at the connecting bridge, and the final failure mode is concrete failure in the compression zone. With the increase of the eccentricity, the ultimate bearing capacity of the wall decreases obviously, and the change of the concrete strain is similar to that of the ordinary concrete wall. The results of finite element analysis are in good agreement with the test results, which can provide analysis method and theoretical basis for engineering design.

宋珊珊,李倩茹,徐晓,等.新型EPS模块浇筑墙体受压性能试验研究[J].混凝土与水泥制品,2021(8):64-68. SONG S S,LI Q R,XU X,et al.Experimental Study on Compression Performance of New EPS Module Walls[J].CHINA CONCRETE AND CEMENT PRODUCTS,2021(8):64-68.

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