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首页> 外文会议>International Symposium on Structural Engineering for Young Experts; 20060818-21; Fuzhou amp; Xiamen(CN) >Experimental Study on Mechanical Properties of a New Steel-Concrete Composite Transfer Beam
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Experimental Study on Mechanical Properties of a New Steel-Concrete Composite Transfer Beam

机译：新型钢-混凝土组合传递梁力学性能的试验研究

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摘要

Experimental studies on the mechanical properties of a new type of steel-concrete composite transfer beam, the steel truss reinforced concrete (STRC) beam, were carried out. The new developed STRC beams were applied to a skyscraper in Guangzhou city. Two herringbone STRC composite transfer beams, one triangle STRC composite transfer beam and one normal reinforced concrete transfer beam were selected to test. Mechanical performances of the four specimens under vertical concentrated loads, including the characteristics of the strains of the reinforcing bars, stirrups and steel truss were studied. Meanwhile the mechanical properties of the new transfer beams and normal reinforced concrete transfer beam were compared. Results show that the width of the shear cracks is greatly decreased in the STRC beams, compared with that in normal concrete transfer beam with same size. The rigidity and bearing capacity of the transfer beams can be remarkably improved through adding steel truss in the concrete beams, even if longitudinal flexural reinforcements of the beams are decreased. The strains of the reinforcing steel bars and stirrups in the STRC composite transfer beams are much smaller than those in normal concrete beams under same load. As a type of new transfer member, the advantages of the concrete and the steel truss members are combined and high bearing capacity can be obtained, therefore, the STRC composite transfer beam is a safe and economic transfer beam with bright future of engineering applications.
机译：进行了一种新型的钢-混凝土组合转换梁（STRC）的力学性能的试验研究。新开发的STRC梁被应用于广州市的一座摩天大楼。选择了两根人字形STRC组合梁，一根三角形STRC组合梁和一根普通钢筋混凝土传递梁进行测试。研究了四个试样在垂直集中载荷下的力学性能，包括钢筋，箍筋和钢桁架的应变特性。同时比较了新型转移梁和普通钢筋混凝土转移梁的力学性能。结果表明，与相同尺寸的普通混凝土转换梁相比，STRC梁的剪切裂缝宽度大大减小。即使减少梁的纵向抗弯钢筋，也可以通过在混凝土梁中添加钢桁架来显着提高传递梁的刚度和承载能力。在相同载荷下，STRC复合材料转移梁中钢筋和箍筋的应变比普通混凝土梁中的应变小得多。作为一种新型的传递构件，混凝土和钢桁架构件的优点相结合，可获得较高的承载力，因此，STRC复合传递梁是一种安全，经济的传递梁，具有广阔的工程应用前景。

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