摘要
根据单根加载试验情况,建立扣件式钢管模板支撑体系有限元模型,试验结果与有限元分析结果吻合较好,验证该有限元模型的正确性。进一步分析了剪刀撑布置方式与顶层增设水平拉杆对架体整体稳定性的影响。研究表明:加入竖向剪刀撑比加入水平剪刀撑,支撑体系的屈曲荷载提高了78.7%;同时加入竖向剪刀撑和水平剪刀撑比只加入竖向剪刀撑,支撑体系的屈曲荷载提高了0.93%;设置竖向剪刀撑可显著提高支撑体系屈曲荷载;设置水平剪刀撑对提高支撑体系屈曲荷载作用不明显。在顶层步距两水平拉杆中间增设一道水平拉杆,支撑体系的屈曲荷载可得到有效提高。
According to the three sets of single loading tests for fastener type steel pipe formwork support system,the finite element model of fastener type steel pipe formwork support system was built,the experimental results were in good agreement with the finite element analysis results,the correctness of the finite element model was verified.The influence of the arrangement mode of the X-bracing and the addition of the horizontal tension rod on the top layer on the overall stability of the frame was further anlayzed.The results showed that the buckling load of the system setting up X-bracing in vertical direction increased by 78.7%;At the same time,the buckling load of the support system with vertical X-bracing system and the horizontal X-bracing system increased by 0.93% than that only with vertical X-bracing.The vertical X-bracing could significantly improve the buckling load of the support system;It was not obvious to improve the buckling load of the support system by setting the horizontal X-bracing.A horizontal tension rod was added in the middle part of the top step distance between two horizontal tensiion rod,and the buckling load of the support system was improved effectively.
作者
刘莉
储诚明
武一
LIU Li CHU Chengming WU Yi(Shenyang Jianzhu University, Shenyang 110168, China Anhui Urban ＆ Rural Planning and Design Institute, Hefei 230012, China Tianjin Branch, China Construction Eighth Engineering Division Co. Ltd, Tianjin 300450, China)
出处
《钢结构》
北大核心
2017年第9期90-92,27,共4页
Steel Construction
基金
辽宁省自然科学基金项目(201602617)
辽宁省高等学校创新团队项目(LT2015023)
关键词
扣件式钢管模板支撑体系
屈曲分析
剪刀撑
水平拉杆
fastener type steel tube formwork support system
buckling analysis
X-bracing
horizontal tension rod
