粉煤灰泡沫混凝土墙体面外偏压承载力数值模拟及简化计算  

Numerical Simulation and Simplified Calculation of Bearing Capacity for Solid Fly Ash Foam Concrete Wall under Out-of-plane Eccentric Compression

作　　者：郝贠洪[1,2,3] 刘永超 秦立达 王洪泽 孙浩 HAO Yunhong;LIU Yongchao;QIN Lida;WANG Hongze;SUN Hao(School of Civil Engineering,Inner Mongolia University of Technology,Hohhot,China,010051;Engineering Technology Research Center for Building Inspection,Identification and Safety Assessment of Inner Mongolia Autonomous Region,Hohhot,China,010051;Key Laboratory of Civil Engineering Structure and Mechanics of Inner Mongolia Autonomous Region,Hohhot,China,010051)

机构地区：[1]内蒙古工业大学土木工程学院,内蒙古呼和浩特010051 [2]内蒙古自治区建筑检测鉴定与安全评估工程技术研究中心,内蒙古呼和浩特010051 [3]内蒙古自治区土木工程结构与力学重点实验室,内蒙古呼和浩特010051

出　　处：《沈阳建筑大学学报（自然科学版）》2024年第5期818-829,共12页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(12272190);中央引导地方科技发展资金项目(2022ZY0189)。

摘　　要：目的 提出一种粉煤灰泡沫混凝土墙体结构,对墙体进行平面外偏压力学性能研究及参数分析,为该墙体在村镇低、多层建筑中的推广应用奠定基础。方法 设计3种粉煤灰泡沫混凝土墙体模型,采用ABAQUS有限元分析软件对墙体平面外偏压力学性能进行研究;建立104个墙体模型并展开参数化分析,研究高宽比、内置冷拔钢丝间距、冷弯薄壁C型钢厚度等关键参数对墙体平面外偏压力学性能的影响规律;最后建立适用于不同截面参数及高宽比的粉煤灰泡沫混凝土墙体平面外偏压承载力简化计算式。结果 有限元分析所得墙体损伤位置基本与试验结吻合,墙体极限承载力有限元分析值与试验值之比在1.114~1.147;墙体截面参数中冷拔丝间距对平面外偏压承载力相关曲线的影响为正相关,高宽比、冷弯薄壁型C钢厚度为负相关。结论 平面外偏压承载力简化计算式计算结果基本位于有限元分析曲线内部且曲线趋势一致,可以较为准确地预测粉煤灰泡沫混凝土墙体平面外偏压承载力,为墙体在工程实践中的设计提供一定理论依据。This paper proposed a thermal insulation and load-bearing fly ash foam concrete walland investigate the mechanical properties of the wall under out-of-plane eccentric compression and analyze the parameters,in order to lay a foundation for the popularization and application of the wall in low-rise and multi-storey buildings in villages and towns.Three kinds of fly ash foam concrete wall models were designed,and ABAQUS finite element software was used to study the mechanical properties of the wall under out-of-plane eccentric compression.104 wall models were established and parametric analysis was carried out to study the influence of key parameters such as aspect ratio,built-in cold-drawn steel wire spacing,and thickness of cold-formed thin-walled C-section steel on the mechanical properties of the wall under out-of-plane eccentric compression.Finally,a simplified calculation formula for the out-of-plane eccentric compression bearing capacity of fly ash foam concrete walls with different cross-section parameters and aspect ratios is established.The damage location of the wall obtained by the finite element analysis was basically consistent with the test results,and the ratio of the finite element analysis value to the test result value of the ultimate bearing capacity of the wall was between 1.114 and 1.147.The influence of cold drawn wire spacing on the correlation curve of out-of-plane eccentric compression bearing capacity in the wall section parameters is positively correlated,and the height-width ratio and the thickness of cold-formed thin-walled C steel are negatively correlated.The calculation results of the simplified calculation formula of the out-of-plane eccentric compression bearing capacity are basically located inside the finite element analysis curve and the curve trend is consistent.It can accurately predict the out-of-plane eccentric compression bearing capacity of the fly ash foam concrete wall and provide a theoretical basis for the design of the wall in engineering practice.

关 键 词：泡沫混凝土墙体 偏心受压 力学性能 有限元分析 简化计算 

分 类 号：TU398[建筑科学—结构工程]