排序方式: 共有6条查询结果,搜索用时 15 毫秒
1
1.
2.
仇一颗 《湖南城建高等专科学校学报》2001,10(3):25-27
通过在塔架的吊装中不用大型吊车和大型拔杆,塔身也不作任何加固的情况下,采用“二吊点人字拔杆整体吊装法”吊装塔架结构的工程实践,分析了该方法的一些经济技术指标,提出了应用该方法的具体实施方案。 相似文献
4.
深受弯构件的拉压杆模型已经得到了广泛的认可。为研究混凝土深梁设计中采用的压杆-拉杆模型,进行了简支深梁集中荷载下的模型静载试验。试验设计依据为《混凝土结构设计规范》(GB 50010—2010)中深梁的相关规定及美国《混凝土结构建筑规范》(ACI318M-05)中压杆-拉杆模型设计的相关规定,试验参数为剪跨比、配筋方式等。试验结果表明,深梁混凝土抗压强度软化系数β与剪跨比和分布钢筋配筋率有关;水平分布筋对于承载力的贡献大于竖向分布钢筋。根据试验结果比较,中国规范对于小剪跨比(λ≤1)深梁的设计有较大的安全储备,美国规范深梁设计中所采用的压杆-拉杆模型较为经济合理。 相似文献
5.
6.
With consideration of the differences between concrete and steel, three solutions using genetic evolutionary structural optimization
algorithm were presented to automatically develop optimal strut-and-tie model for deep beams. In the finite element analysis
of the first method, the concrete and steel rebar are modeled by a plane element and a bar element, respectively. In the second
method, the concrete and steel are assigned to two different plane elements, whereas in the third method only one kind of
plane element is used with no consideration of the differences of the two materials. A simply supported beam under two point
loads was presented as an example to verify the validity of the three proposed methods. The results indicate that all the
three methods can generate optimal strut-and-tie models and the third algorithm has powerful capability in searching more
optimal results with less computational effort. The effectiveness of the proposed algorithm III has also been demonstrated
by other two examples. 相似文献
1