采矿与岩层控制工程学报2024，Vol.6Issue(6)：29-43,15.DOI:10.13532/j.jmsce.cn10-1638/td.2024-1147
钢管混凝土墩柱结构设计优化与力学性能研究
Research on structural design optimization and mechanical properties of concrete-filled steel tubular pier column
摘要
Abstract
To enhance the bearing capacity of conventional concrete-filled steel tubular columns and meet the requirements of roadside support structures in underground roadways with heights ranging from 2.5 to 3.0 meters,an internally reinforced steel concrete-filled steel tubular pier column was proposed.Specific design parameters for concrete-filled steel tubular columns with appropriate length-to-diameter ratios were developed to suit the conditions of underground roadways.Comparative experiments were conducted to evaluate the mechanical properties of conventional and internally reinforced concrete-filled steel tubular short columns,and the axial compression performance of concrete-filled steel tubular long columns was also studied.The results indicate that the internally reinforced concrete-filled steel tubular pier columns exhibit reduced local buckling and core concrete damage compared to conventional concrete-filled steel tubular pier columns.These columns demonstrate smaller lateral and longitudinal deformations,slower failure progression,and superior ductility.Additionally,the ultimate bearing capacity of the internally reinforced concrete-filled steel tubular pier column is 500 kN higher than that of its conventional counterpart.For concrete-filled steel tubular long columns,the elastic limit strain ranges from 0.1%to 0.6%,while the plastic limit strain ranges from 2.0%to 6.7%.However,the bearing capacity of concrete-filled steel tubular long columns decreases significantly with an increasing length-to-diameter ratio,and their failure mode is characterized by pronounced buckling deformation.These findings provide valuable insights for optimizing the structural design and improving the mechanical performance of concrete-filled steel tubular pier columns.关键词
巷道支护/钢管混凝土墩柱/内配型钢/结构优化/长、短柱力学性能Key words
road supporting/concrete-filled steel tube pier/internally reinforced steel/structural optimization/mechanical properties of long and short columns分类
矿业与冶金引用本文复制引用
黄万朋,侯可可,赵同阳,刘士磊,姜洪义,袁啸..钢管混凝土墩柱结构设计优化与力学性能研究[J].采矿与岩层控制工程学报,2024,6(6):29-43,15.基金项目
国家自然科学基金资助项目(51774195) （51774195）
煤炭资源高效开采与洁净利用国家重点实验室开放基金资助项目(2021-KFYB-020) （2021-KFYB-020）
