CONTRIBUTION OF STEEL FIBERS TO THE STRENGTH CHARACTERISTICS OF LIGHTWEIGHT CONCRETE SLAB-COLUMN CONNECTIONS FAILING IN PUNCHING SHEAR
CONTRIBUTION OF STEEL FIBERS TO THE STRENGTH CHARACTERISTICS OF LIGHTWEIGHT CONCRETE SLAB-COLUMN CONNECTIONS FAILING IN PUNCHING SHEAR
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DOI：
10.14359/3957
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发表时间：
1993-07
影响因子：
1.8
通讯作者：
D. Theodorakopoulos;N. Swamy
中科院分区：
文献类型：
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作者：
D. Theodorakopoulos;N. Swamy
这是一个全面的研究钢纤维的影响的强度和轻骨料混凝土板柱连接设计破坏冲切性能。测试的板是原型结构的一对一模型，研究的变量包括纤维体积、纤维类型、传统钢筋的减少、加载区域和混凝土强度。展示了纤维如何改变素混凝土板的强度。重点是纤维的作用，提高延性和能量吸收性能，在保持连续性和完整性的结构元件失败后，并在转换脆性故障的韧性。研究表明，钢纤维可以有效地作为抗剪钢筋冲切破坏，它们可以补偿降低的弹性模量和较低的拉伸劈裂强度的轻混凝土。
This is a comprehensive study of the influence of steel fibers on the strength and behavior of lightweight aggregate concrete slab-column connections designed to fail in punching shear. The slabs tested were one-to-one models of prototype structure, and the variables investigated included fiber volume, fiber type, reduction in conventional steel reinforcement, loaded area, and the concrete strength. It is shown how fibers modify the strength of plain concrete slabs. Emphasis is given to the role of fibers in enhancing ductility and energy-absorption properties, in preserving the continuity and integrity of the structural element after failure, and in transforming brittle failures to ductile ones. The study proves that steel fibers can act effectively as shear reinforcement in punching shear failures, and that they can compensate for the reduced elastic modulus and lower tensile splitting strength of lightweight concrete.