共查询到10条相似文献，搜索用时 15 毫秒
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夏占国 《廊坊师范学院学报(自然科学版)》2010,10(4)
钢筋工程造价占整个工程造价的比重很大.针对目前钢筋混凝土钢筋分项工程中箍筋长度计算不准确, 甲乙双方在工程量结算时易产生分歧等问题, 从箍筋的分类及计算依据入手,探讨了现行矩形双肢箍长度计算公式的利弊,提出了按实计算的建议,利于工程的准确计量和价格的合理确定. 相似文献
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The stress-strain curves of confined concrete were obtained based on tests of seven cross-shaped columns confined by stirrups under axial load. The experiment results showed that the strength and deformation of confined concrete can be enhanced effectively by stirrups for cross-shaped columns. Compared with the non-confined concrete, when the stirrup characteristic value is in the range of 0.046--0.230, the confined concrete compressive strengths has an increase of 8%--43%, and the strain corresponding to the peak stress of confined concrete has an increase of 25%-- 195%. According to the test results, the effects of stirrup characteristic and stirrup spacing on the compressive strength and strain of confined concrete were analysed. It is shown that the compressive strength of confined concrete has a linear relationship with the product of stirrup characteristic value and stirrup effective restraint coefficient, and the strain corresponding to the peak stress of confined concrete has a nonlinear relationship with the product of stirrup characteristic value and stirrup effective restraint coefficient. The stress-strain curve equation of confined concrete was proposed for cross-shaped columns, and the calculated curves are in good agreement with the experimental curves. 相似文献
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《西游记》孙悟空头上的“紧箍”受“束发用具”及受“刑具”启发而发展衍化而来。唐僧、观音及如来均没有“松箍咒”,则孙悟空只能依靠自身的力量去掉紧箍,“松箍咒”就是孙悟空的“自性自度”,与“解铃还须系铃人”同一机杼。“紧箍”类似《后西游记》中套住小行者的“好胜圈”,“紧箍”是孙悟空成佛作祖的关键所在。 相似文献
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孙建用 《中国石油大学胜利学院学报》2011,25(1):10-12,20
水平井整体开发已成为胜利油田稠油油藏开发的趋势,利用筛管顶部注水泥的完井方法占水平井完井方法的77%.筛管顶部注水泥完井方法适用于天然裂缝性碳酸盐岩或硬质砂岩储层、单一厚储层或不要求层段分隔的储层、岩性较为硫松的中(粗)砂粒储层等,其工艺既解决了常规田井工艺水泥污染油气层的问题,又能有效封固产层以上地层,保证产层与上部... 相似文献
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钢筋套箍加固砼柱后，能对其所包围的核心起约束作用，使之处于三轴受压的后力状态，具有较高的抗压强度和极限压缩变形，此即砼的“套箍强化”。钢筋箍对约束砼抗压强度的增强作用因配箍数量、间距和构造而变化。影响的主要因素之一为约束指标λt。通过模拟工程结构投入使用前先进行加固和使用过程中出现裂缝后进行加固两种工程状况试验，可得到钢筋套箍加固柱的受力性能和承载力建议计算公式。 相似文献