Research on flexural performance of new pipe-roof pre-construction structures
Research on flexural performance of new pipe-roof pre-construction structures
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DOI：
10.1016/j.istruc.2023.105279
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发表时间：
2023-11
期刊：
影响因子：
4.1
通讯作者：
Han Shi;Weiwei Ji;Yanqing Zhang;Yvxuan Lv;Liu Yong;Longfei You
中科院分区：
文献类型：
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作者：
Han Shi;Weiwei Ji;Yanqing Zhang;Yvxuan Lv;Liu Yong;Longfei You
为了研究新型管顶预制结构的抗弯性能，本文以连接件设置和纵向配筋为参数进行了试验研究。观察了试件的裂纹发展和破坏模式，并测量了试件的载荷、挠度和应变。基于试验结果，研究了PRP结构的受力机理，分析了连接件和纵向配筋对PRP结构构件抗弯性能的影响。结果表明，PRP结构中受弯构件的破坏过程和受力机理与等截面高度的双钢板混凝土构件有很大不同。PRP结构中受弯构件的破坏一般发生在钢管幕与钢板的交接处，主要是由于截面高度突变引起的应力集中。试件内构件屈服顺序为纵向钢筋、连接件、钢管帷幕。与螺柱连接件相比，双钢连接件能更有效地改善PRP结构中受弯构件的力学性能。对于有纵筋的试件，设置双钢连接件提高的承载力要大于没有纵筋的试件。
In order to study on the flexural performance of new pipe-roof pre-construction (PRP) structures, an experiment was conducted by taking the setting of connectors and longitudinal reinforcement as parameters in this paper. The crack development and failure mode of specimens were observed, and the load, deflection as well as strain of the specimens were measured. Based on the test results, the stress mechanism of PRP structures was studied, and the influence of connectors and longitudinal reinforcement on the flexural performance of PRP structural members was analyzed. The results show that the failure process and stress mechanism of flexural members in the PRP structure are quite different from that of double steel plate concrete members with constant section height. The failure of flexural members in PRP structures generally occurs at the intersection of steel pipe curtains and steel plates, which is mainly due to the stress concentration caused by the sudden changes of section height. The yield order of the components in the specimen is longitudinal reinforcement, connectors, and steel pipe curtains. Comparing with studs connectors, the bi-steels connectors can more effectively improve the mechanical properties of flexural members in PRP structure. For the specimens with longitudinal reinforcement, the load bearing capacity improved by setting bi-steel connectors is larger than that for specimens without longitudinal reinforcement.