新型装配式钢管混凝土柱-预制RC横系板格构式高墩静力推覆性能研究
焦佳楠 , 王宣鼎 , 乔云强 , 陈晓虎 , 刘永健 , 刘源 , 周绪红
建筑钢结构进展 ›› 2026, Vol. 28 ›› Issue (02) : 1 -9.
新型装配式钢管混凝土柱-预制RC横系板格构式高墩静力推覆性能研究
Static Pushover Performance of a Novel Prefabricated Laced High Pier with CFST Columns and Precast RC Tie Plates
本文提出了一种新型装配式钢管混凝土(CFST)桥墩体系,采用间断预制钢筋混凝土(RC)横系板连接,抗侧刚度大,施工效率高。基于ABAQUS软件,建立该新型桥墩体系的精细化有限元模型,并开展参数分析,考察板间距、板高、板分布等对体系静力推覆性能与损伤模式的影响规律;基于有限元分析,提出该桥墩体系的概念设计建议。研究结果表明:该桥墩体系具有较高的抗侧刚度、承载力与较好的延性,新型装配式CFST柱-预制RC横系板的连接节点能保证体系的高效传力与充分变形,合理设计预制RC横系板的高度与间距可改变体系的塑性发展机制,以满足不同性能化设计的需要。
A novel prefabricated concrete filled steel tube (CFST) laced pier system connected by discontinuous precast RC tie plates is proposed, providing high lateral stiffness and high construction efficiency. Refined finite element models are established using ABAQUS to evaluate the static pushover response of the system and to clarify its damage patterns. A parametric study is conducted to quantify the effects of tie plate arrangement, including spacing, height and distribution ratio. Based on the finite element analysis, several concept design suggestions of the pier system are put forward. The results show that the pier system has high lateral stiffness, bearing capacity and ductility, and the novel prefabricated CFST column-RC tie plate connection can ensure the efficient force transmission and full deformation of the system. At peak load, the connections exhibited only localized yielding, suggesting a rational connection design. Reasonable design of the height and spacing of the RC tie plate can change the plastic development mechanism of the system to meet the different performance-based design demands.
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重庆市在渝院士牵头科技创新引导专项(CSTB2023YSZX-JSX0001)
重庆市自然科学基金(CSTB2022NSCQ-MSX1529)
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