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首页> 外文期刊>Engineering Structures >Beam-column joints in continuous RC frames: Comparison between cast-in-situ and precast solutions
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Beam-column joints in continuous RC frames: Comparison between cast-in-situ and precast solutions

机译：连续RC框架中的梁柱节点：现浇和预制解决方案之间的比较

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摘要

The use of precast reinforced concrete elements is rapidly increasing since this technique has several advantages over traditional cast-in-situ structural members such as lower manufacturing time and costs and a better quality control. Nevertheless, cast-in-situ solutions intrinsically allow building moment resisting frames, a behavior that is usually hard to achieve using precast elements. In this paper a technical solution able to offer both high strength and ductility, simplicity of construction of the prefabricated elements and ease of assembly on site is presented. The solution realizes the continuity between beam and column by means of loop splices and cast-in-place concrete with steel fibers to improve the ductility of the concrete struts in the wet joint. The connection has been experimentally tested and compared to an analogous cast-in-situ one. The experimental results confirmed its good structural performances in terms of strength and ductility. Numerical investigations tuned on the basis of the experimental results allowed the improvement of the design to achieve reduced column damages for higher drift values while maintaining practically unchanged structural performances. (C) 2016 Elsevier Ltd. All rights reserved.
机译：预制钢筋混凝土构件的使用正在迅速增加，因为与传统的现浇结构构件相比，该技术具有多个优势，例如，制造时间和成本更低，质量控制更好。但是，现浇解决方案本质上允许构建抗弯框架，而使用预制构件通常很难实现这种行为。在本文中，提出了一种既能提供高强度又具有延展性，预制构件的构造简单且易于现场组装的技术解决方案。该解决方案通过环形接头和带钢纤维的现浇混凝土来实现梁和柱之间的连续性，从而提高了湿式接头中混凝土支杆的延展性。该连接已通过实验测试，并与类似的现浇铸件进行了比较。实验结果证实了其在强度和延展性方面的良好结构性能。在实验结果的基础上进行的数值研究调整，使设计得以改进，从而在降低了色谱柱对较高漂移值的损害的同时，又保持了几乎不变的结构性能。 （C）2016 Elsevier Ltd.保留所有权利。

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