圆钢管煤矸石混凝土中长柱轴压性能有限元分析  

Finite Element Analysis of Spontaneous-Combustion Coal Gangue Concrete Filled Round Steel Tube Medium-Length Columns under Axial Compressive

作　　者：张玉琢 黄怡萌 刘进隆 姬婷婷 路林翰 ZHANG Yuzhuo;HUANG Yimeng;LIU Jinlong;JI Tingting;LU Linhan(School of Management,Shenyang Jianzhu University,Shenyang,China,110168;School of Civil Engineering,Southeast University,Nanjing,China,211189)

机构地区：[1]沈阳建筑大学管理学院,辽宁沈阳110168 [2]东南大学土木工程学院,江苏南京211189

出　　处：《沈阳建筑大学学报（自然科学版）》2024年第4期697-705,共9页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(51808352);辽宁省教育厅基本科研项目(lnqn202024)。

摘　　要：目的研究圆钢管煤矸石混凝土中长柱的轴压性能,找到各设计参数对试件轴压承载力的影响规律,提出轴压承载力计算式,推广钢-煤矸石混凝土组合结构。方法采用ABAQUS有限元分析软件建立圆钢管煤矸石混凝土中长柱轴压有限元模型,分析典型试件受力全过程的应力分布、荷载分配以及不同参数变化对其轴压承载力的影响。结果相同设计参数下,钢材屈服强度与含钢率是承载力的关键影响因素;而随煤矸石粗骨料取代率的增加,试件的承载力降低幅度未超过3.6%。结论掺入煤矸石粗骨料后的试件仍具有较高承载力,依据《钢管混凝土结构技术规范》(GB 50936—2014)中的方法对计算式进行修正后的误差在10%以内,适用于圆钢管煤矸石混凝土中长柱,能够满足实际需求。To investigate the axial compression performance of circular steel tube-coal gangue concrete medium-length columns and discern the influence patterns of various design parameter variations on specimen axial load-bearing capacity,a formulation for axial load-bearing capacity is proposed.A computational model is developed using ABAQUS software.After verifying the accuracy and effectiveness of the finite element model,the entire process of load analysis for typical components and the variation of axial load-bearing capacity under different conditions are analyzed.It is observed that the increase in self-ignition coal gangue aggregate(SCGA)content has a negligible influence on the axial load-bearing capacity of the components,with an impact of no more than 3.6%.The calculated bearing capacity formula,considering the aspect ratio,stability factor,and SCGA substitution coefficient,exhibits an error within 10%.

关 键 词：圆形钢管混凝土 中长柱 煤矸石粗骨料 轴压承载力 长细比 

分 类 号：TU398.1[建筑科学—结构工程]