何庆锋,张麟斌,易伟建.ECC/RC键槽节点装配整体式梁柱结构 倒塌性能试验研究[J].湖南大学学报:自然科学版,2020,(1):10~18
ECC/RC键槽节点装配整体式梁柱结构 倒塌性能试验研究
Experiment Study on Collapse Performance of Precast ECC/RC Composite Beam-column Structure with Key-way Joints
  
DOI:
中文关键词:  键槽节点  倒塌性能  梁柱结构  ECC  节点延性
英文关键词:key-way joint  collapse performance  beam-column structure  ECC  node ductility
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作者单位
何庆锋,张麟斌,易伟建 (湖南大学 土木工程学院湖南 长沙 410082) 
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中文摘要:
      为了研究键槽连接节点装配整体式梁柱结构倒塌性能以及不同后浇混凝土对其性能的影响,完成了2榀单层两跨梁柱结构的移柱静力加载试验,其分别在节点键槽处后浇普通C30混凝土、高延性ECC混凝土. 试验获取了构件力-位移曲线、破坏形态以及变形性能等试验数据. 研究结果表明:键槽连接节点梁柱结构在满足常规抗震荷载要求下,变形过程中能较好地形成梁机制、压拱机制以及悬索机制,是一种较好的装配式结构可采取的抗倒塌节点形式. 依靠ECC高延性、高极限压应变等优越的材料性能,ECC键槽节点梁柱结构能表现出更高的承载能力以及更好的节点延性. 钢筋与混凝土之间的局部不均匀相对滑移有利于结构发展大变形,提高结构的抗倒塌性能.
英文摘要:
      In order to study the collapse performance of beam-column structure with key-way joints and to study the effect of different post-cast concrete on its performance,static loading tests for two single-story two-span beam-column structures were performed. In the two specimens,ordinary C30 concrete and high ductility ECC concrete were poured at the key-way joints,respectively. The test dates of force displacement curve,failure mode and deformation performance were obtained. The research indicated that the beam-column structure with key-way joints developed beam mechanism,arch mechanism and catenary mechanism in turn during the deformation process under the requirements of the conventional seismic load. It was a good anti-collapse node form for the assembled structure. Relying on the superior material properties of ECC,such as high ductility and high ultimate compressive strain,beam-column structure with ECC key-way joints can exhibit greater load-carrying capacity and better ductility of joints. The local non-uniform relative slip between steel and concrete was conducive to the development of large deformation of the structure and improved the collapse resistance of the structure.
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