方钢管再生混凝土组合异形柱偏压力学性能及参数化分析

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中图分类号：TU528；U445 文献标志码：A 文章编号：1008-0562（2026）01-0066-07

Eccentric mechanical properties and parametric analysis of recycled concrete composite special-shaped columns made of square steel tubes

MA Tengfei1，2，34， GAO Xuanran³， HAO Ziqi³， MA Zhifeng？ （1.Central Research Institute of Building and Construction Company Limited MCC Group， Beijing 100088，China;2.Department of Civil Engineering，Tsinghua University，Beijing 10oo84，China;3.Department of Civil Engineering，North China Institute of Aerospace Engineering，Langfang 065000，China;4.Technical Innovation Center of Building Insulation and Structure Integration in Hebei Province， Langfang 065000， China）

Abstract： Aiming at the influence of recycled coarse aggregate replacement rate on the mechanical properties of square steel tube recycled concrete composite special-shaped columns under eccentric compression，based on the existingtestresults，theverified finite element method wasused toanalyze the mechanical propertiesof this kind of special-shaped columns under eccentric compression load.The results show that the eccentric compression bearing capacity of square steel tube recycled concrete composite special-shaped columns decreases with the increase of coarse aggregate replacement rate. When the replacement rate of coarse aggregate exceeds 40% ，the downward trend of bearing capacity is more significant.Under the condition of the same coarse aggregate replacement rate，increasing the yield strength of steelor increasing the thickness ofsteelcan effectively enhance the overall stability of the specimen and improve its eccentric bearing capacity. Increasing the width of the connecting plate will weaken the stability of the specimen，resulting in a decrease in the bearing capacity.

Keywords：concrete-filled steel square tubular column；L-shaped column;recycled concrete；biaspressure bearing capacity; mechanical properties; coarse aggregate

0 中 引言

方钢管混凝土组合异形柱是由多个单肢方钢管混凝土柱通过加劲肋间隔焊接连接而成[1，具体类型见图1。（剩余10814字）