| 模板支架水平构件的可靠性计算与分析 |
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| 引用本文： | 胡长明,程佳佳. 模板支架水平构件的可靠性计算与分析[J]. 河南科技大学学报(自然科学版), 2011, 32(6): 46-50,7 |
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| 作者姓名： | 胡长明 程佳佳 |
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| 作者单位： | 西安建筑科技大学土木学院,陕西,西安,710055 |
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| 摘 要： | 对模板支架水平构件进行了失效分析,建立了方木及水平杆的强度及挠度失效状态函数,研究了结构可靠性计算的直接积分法,进行了水平构件的可靠性计算与分析。研究表明:在小于目标失效概率Pf=10-4情况下,方木的剪力设计值可取为2 760 N,当水平构件受跨中集中荷载时其设计值不应该超过4 475 N,受均布荷载时其设计值不应该超过5.484 08 N/mm。研究结果为高大模板支架水平构件的设计提供了有价值的参考资料,对减小施工过程中模板支架坍塌事故的发生,具有一定的理论及实践意义。
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| 关 键 词： | 模板支架 强度 挠度 可靠性 失效概率 |
Reliability Calculation and Analysis of Horizontal Members of Formwork Support |
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| HU Chang-Ming,CHENG Jia-Jia. Reliability Calculation and Analysis of Horizontal Members of Formwork Support[J]. Journal of Henan University of Science & Technology:Natural Science, 2011, 32(6): 46-50,7 |
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| Authors: | HU Chang-Ming CHENG Jia-Jia |
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| Affiliation: | (School of Civil Engineering,Xi’an University of Architecture & Technology,Xi’an 710055,China)Abstact:The failure modes of formwork support horizontal members were investigated and the state function of strength and deflection failure was established for rectangular timber and horizontal tube.The direct numerical integration method of reliability calculation was discussed.The reliability of horizontal members was calculated and analysed.At the target failure probability Pf=10-4,the shearing force design value of rectangular timber was 2 760 N.The design value of horizontal tube should be less than 4 475 N under concentrated loads and less than 5.484 08 N/mm under uniform loads.The results provide valuable references to design high-formwork support and are useful for reducing collapse accidents of formwork support during construction process. |
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| Abstract: | |
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| Keywords: | Formwork support Strength Deflection Reliability Probability of failure |
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