施工技术
施工技術
시공기술
Construction Technology
2015年
14期
76-82
,共7页
脚手架%盘销节点%稳定性%极限承载力%试验%参数分析
腳手架%盤銷節點%穩定性%極限承載力%試驗%參數分析
각수가%반소절점%은정성%겁한승재력%시험%삼수분석
scaffolds%pin-disk joint%stability%bearing capacity%testing%parameter analysis
作为一种薄壁钢管结构，结构稳定性是影响施工用钢管支架结构安全性的主要因素。对一种新型承插型盘销式钢管支架结构稳定性进行试验和理论分析研究，包括基本受力单元体足尺试验和有限元分析，并在此基础上对由基本受力单元体扩展形成的支架整体结构进行稳定性参数分析。研究结果表明：支架结构体系中设置的斜撑杆对提高结构稳定承载力具有重要作用；支架结构体系具有完整性，基本受力单元体纵横向空间扩展对支架结构整体稳定承载力影响不大；立杆顶部悬臂长度是影响支架结构稳定承载力的关键因素，通过拟合参数分析结果提出了结构稳定承载力简化计算公式；并提出了工程实践时应注意控制立杆顶部悬臂长度或采取减小顶层水平杆步高的构造措施来提高支架结构安全性的建议。
作為一種薄壁鋼管結構，結構穩定性是影響施工用鋼管支架結構安全性的主要因素。對一種新型承插型盤銷式鋼管支架結構穩定性進行試驗和理論分析研究，包括基本受力單元體足呎試驗和有限元分析，併在此基礎上對由基本受力單元體擴展形成的支架整體結構進行穩定性參數分析。研究結果錶明：支架結構體繫中設置的斜撐桿對提高結構穩定承載力具有重要作用；支架結構體繫具有完整性，基本受力單元體縱橫嚮空間擴展對支架結構整體穩定承載力影響不大；立桿頂部懸臂長度是影響支架結構穩定承載力的關鍵因素，通過擬閤參數分析結果提齣瞭結構穩定承載力簡化計算公式；併提齣瞭工程實踐時應註意控製立桿頂部懸臂長度或採取減小頂層水平桿步高的構造措施來提高支架結構安全性的建議。
작위일충박벽강관결구，결구은정성시영향시공용강관지가결구안전성적주요인소。대일충신형승삽형반소식강관지가결구은정성진행시험화이론분석연구，포괄기본수력단원체족척시험화유한원분석，병재차기출상대유기본수력단원체확전형성적지가정체결구진행은정성삼수분석。연구결과표명：지가결구체계중설치적사탱간대제고결구은정승재력구유중요작용；지가결구체계구유완정성，기본수력단원체종횡향공간확전대지가결구정체은정승재력영향불대；립간정부현비장도시영향지가결구은정승재력적관건인소，통과의합삼수분석결과제출료결구은정승재력간화계산공식；병제출료공정실천시응주의공제립간정부현비장도혹채취감소정층수평간보고적구조조시래제고지가결구안전성적건의。
As a thin?walled steel tubular structure, structural stability is main factor to affect the safety of steel tubular scaffold during construction. Experimental and theoretical study on new pin?disk type steel tubular scaffold structural stability was performed, including the full scale basic unit bearing capacity test and finite element analysis, and the stability parameter analysis of the integral structure formed from the basic unit. The research results indicate that the diagonal brace plays an important role to improve the bearing capacity of structure stability. The basic unit’ s vertical and horizontal spatial expansion has little effect on the bearing capacity of the overall scaffold stability due to the structure system. The uplift length of standing bar is a critical factor to affect the structural stability bearing capacity, and simplified equation is obtained through parameter analysis results fitting. Recommendations were made to control the top cantilever length of standing bar or to reduce the horizontal bar step of the top story to improve the structure safety during engineering practice.
