| 体内张拉成形屋架垂跨比和矢跨比影响分析 |
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| 引用本文： | 王成,张毅刚. 体内张拉成形屋架垂跨比和矢跨比影响分析[J]. 东南大学学报(自然科学版), 2009, 39(4). DOI: 10.3969/j.issn.1001-0505.2009.04.033 |
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| 作者姓名： | 王成 张毅刚 |
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| 作者单位： | 中国建筑科学研究院国家建筑工程质量监督检验中心,北京,100013;北京工业大学空间结构研究中心,北京,100124;北京工业大学空间结构研究中心,北京,100124 |
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| 基金项目： | 国家自然科学基金资助项目，高等学校博士学科点专项科研基金 |
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| 摘 要： | 为了改善体内张拉成形屋架受力性能,根据结构张拉成形后的矢跨比和垂跨比组合的不同,建立了20个计算模型.选用APDL参数化设计语言编程分析垂跨比及矢跨比对结构受力特点的影响.研究表明:随着结构矢跨比的增加和垂跨比的减小,上弦中间单元成形轴力、弯矩和截面应力逐渐增大,而受荷状态则是在此基础上叠加相应轴力;成形阶段以弯曲应变为主,截面拉应力和压应力较为接近,表现为轴压力很小,受荷阶段以轴向压应变的增加为主,表现为轴压力很大.选取适宜的矢跨比和垂跨比组合可以改善体内张拉成形屋架受力性能.
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| 关 键 词： | 屋架 体内张拉成形 垂跨比 矢跨比 |
Analysis on ISFRT affected by sag-span ratio and rise-span ratio |
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| Wang Cheng,Zhang Yigang. Analysis on ISFRT affected by sag-span ratio and rise-span ratio[J]. Journal of Southeast University(Natural Science Edition), 2009, 39(4). DOI: 10.3969/j.issn.1001-0505.2009.04.033 |
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| Authors: | Wang Cheng Zhang Yigang |
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| Affiliation: | Wang Cheng1,2 Zhang Yigang2(1National Center for Quality Supervision , Test of Building Engineering,China Academy of Building Research,Beijing 100013,China)(2Space Structures Research Center,Beijing University of Technology,Beijing 100124,China) |
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| Abstract: | In order to improve mechanics performance of the internal stretch forming roof truss(ISFRT),twenty computation models with different sag-span ratios and rise-span ratios were built.The influence of sag-span ratio and rise-span ratio on mechanics performance was analyzed using parametric design language APDL programming analysis.Study shows that with the increase of rise-span ratio and the decrease of sag-span ratio of ISFRT,the axial force,the bending moment and the cross-section stress of upper chord middl... |
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| Keywords: | roof truss internal stretch forming sag-span ratio rise-span ratio |
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