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单层双向正交索网结构索长误差敏感性分析及控制限值研究
王泽强 1,2,周储君3,周黎光2,司波2,高树栋4
摘 要

(1 天津大学建筑工程学院, 天津 300072;2 北京市建筑工程研究院有限责任公司, 北京 100039;3 北京建筑大学土木与交通工程学院, 北京 100044;4 北京城建集团有限责任公司, 北京 100088)

[摘要]单层双向正交索网结构是由两个方向正交拉索组合而成的索网体系。结构施工偏差和构件加工误差引起的索长误差会改变结构的形状从而改变索力,因此索网结构施工控制,首先应将索长误差控制在一个可接受的范围内,使之对结构响应的影响最小。以国家速滑馆大跨度单层双向正交索网结构为工程背景,研究了由于拉索索长误差引起结构成形态的索力与理论值偏差问题,使用有限元软件MIDAS Gen研究了单根拉索的误差敏感性。研究了单根拉索在不同误差取值下索力的变化规律和同时存在的多根拉索误差对索力的影响,并根据统计学原理制定了拉索的误差控制限值,最后通过现场实测数据验证了该限值的正确性。 

[关键词]国家速滑馆;单层双向正交索网结构;索长误差;敏感性分析;控制限值 

中图分类号:TU394 文献标识码:A文章编号:1002-848X(2021)20-0068-08

 

Study on sensitivity analysis of cable length errors and control limits of single-layer bidirectional orthogonal cable-net structure 

WANG  Zeqiang1,2,  ZHOU  Chujun3,  ZHOU  Liguang2,  SI Bo2,  GAO  Shudong4 

(1 School of Civil Engineering, Tianjin University, Tianjin 300072,China;2 Beijing Building Construction Research Institute Co., Ltd., Beijing 100039, China;3 School of Civil and Transport Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;4 Beijing Urban Construction Group Co.,Ltd., Beijing 100088,China) 

Abstract:Single-layer bidirectional orthogonal cable-net structure is a cable net system composed of two orthogonal cables. Cable length error caused by structural construction error and component processing error will change the configuration of the structure and the internal force of the cable. Therefore, the construction control of cable net structure should firstly control the cable length deviation within an acceptable range to minimize its impact on the structural response. Taking the large-span single-layer bidirectional orthogonal cable-net structure of  National Speed Skating Oval as the engineering background, the problem of the deviation between the structural cable force and the theoretical value caused by the cable length error was studied. The finite element software MIDAS Gen was used to study the error sensitivity of a single stay cable. Then the variation of the cable force of the single cable under different error values and the influence of the multi-track cable error on the internal force of the structure were studied and the error control limits of the cable was established according to the statistical principle. Finally, the feasibility of this limit was verified by field measurements. 

Keywords:National Speed Skating Oval; single-layer bidirectional orthogonal cable-net structure; cable length error; sensitivity analysis; control limit

 

作者简介:王泽强,博士,教授级高级工程师,Email:wzeq7902@sina.com。

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