Abstract This paper developed new steel-concrete-steel (SCS) sandwich composite structures using novel enhanced C-channels (ECs) for civil engineering infrastructures as shear walls, bridge decks, and protective structures. Their structural behaviours have been studied through a series of tests from the component to structural member level. Push-out tests on ECs, two-point loading tests on SCS sandwich beams with ECs (SCSSB-ECs), axial compression tests on SCS sandwich walls with ECs (SCSSW-ECs), in-plane cyclic shear tests and out-of-plane punching shear tests on SCSSW-ECs were carried out to investigate the shear behaviour of ECs, flexural and shear behaviour of SCSSB-ECs, compression behaviour, in-plane seismic behaviour, and out-of-plane punching shear behaviour of SCSSW-ECs, respectively. These studies offered comprehensive information of structural behaviours of SCS sandwich structural members with ECs. Including these experimental studies, corresponding prediction equations were also proposed for ultimate shear resistance and shear-slip behaviour of ECs, flexural and shear resistances of SCSSB-ECs, axial compression resistance, in-plane lateral shear resistance, and out-of-plane punching shear resistance of SCSSW-ECs. Through validations against reported test results, accuracies of these developed prediction equations were confirmed.

中文翻译：

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具有新型 EC 连接件的钢-混凝土-钢夹层复合结构的发展：构件

摘要 本文开发了新型钢-混凝土-钢 (SCS) 夹层复合结构，使用新型增强型 C 槽 (EC) 用于土木工程基础设施，如剪力墙、桥面和防护结构。它们的结构行为已经通过从组件到结构构件级别的一系列测试进行了研究。EC 的推出试验、带 EC 的 SCS 夹层梁 (SCSSB-EC) 的两点加载试验、带 EC 的 SCS 夹层墙的轴向压缩试验 (SCSSW-EC)、面内循环剪切试验和外-对 SCSSW-ECs 进行平面冲剪试验以研究 ECs 的剪切行为、SCSSB-ECs 的弯曲和剪切行为、SCSSW-ECs 的压缩行为、面内地震行为和面外冲切行为， 分别。这些研究提供了带有 ECs 的 SCS 夹层结构构件的结构行为的综合信息。包括这些实验研究，还提出了相应的预测方程，用于ECs的极限剪切阻力和剪切滑移行为、SCSSB-ECs的弯曲和剪切阻力、轴向压缩阻力、面内横向剪切阻力和面外冲压SCSSW-ECs 的抗剪强度。通过对报告的测试结果的验证，确认了这些开发的预测方程的准确性。SCSSW-ECs 的平面内横向剪切阻力和平面外冲压剪切阻力。通过对报告的测试结果的验证，证实了这些开发的预测方程的准确性。SCSSW-ECs 的平面内横向剪切阻力和平面外冲压剪切阻力。通过对报告的测试结果的验证，证实了这些开发的预测方程的准确性。