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Experimental study of a fabricated confined concrete beam-to-column connection with end-plates

机译：带端板的承压混凝土梁柱连接试验研究

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摘要

At present, the building industrialization has become the development direction of construction industry, the precast prefabricated buildings become the focus of the construction industry once again because of its unique characteristics. A new-type of fabricated beam-column connections with end-plates is presented and introduced on this background. To investigate the seismic behavior of the new-type precast connection, seven specimens are tested by pseudo-static test. The hysteresis curves are recorded during the test, and the seismic indicators, such as ductility and energy dissipation capacity, are determined. The test results indicate that the hysteresis curves of precast connection are plump, and all specimens failed in bending in a malleable way with a beam plastic hinge, which is fully consistent with the criterion of strong column weak beams. Additionally, the fabricated connection exhibits satisfactory ductility and energy dissipation capacity, showing better seismic performance. Besides, the flexural capacity of unbonded prestressed confined concrete beam is analyzed, and the formula of flexural bearing capacity is proposed based on the theory of concentrated plastic zone. The theoretical results agree well with the experimental data, which can provide reference for theoretical research. (C) 2017 Elsevier Ltd. All rights reserved.
机译：当前，建筑产业化已成为建筑业的发展方向，预制预制房屋因其独特的特性再次成为建筑业的重点。在此背景下，介绍并介绍了一种新型的带有端板的预制梁柱连接。为了研究新型预制连接的抗震性能，通过伪静态测试对七个样本进行了测试。在测试过程中记录磁滞曲线，并确定诸如延展性和能量消散能力之类的地震指标。测试结果表明，预制连接的滞后曲线是丰满的，并且所有试样均采用梁塑料铰链以可延展的方式弯曲，完全符合强柱弱梁的标准。此外，预制的连接件具有令人满意的延展性和能量消散能力，显示出更好的抗震性能。此外，分析了无粘结预应力约束混凝土梁的抗弯承载力，并基于集中塑性区理论提出了抗弯承载力的公式。理论结果与实验数据吻合良好，可为理论研究提供参考。 （C）2017 Elsevier Ltd.保留所有权利。

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