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Elastic and ultimate behaviour of skew composite slab-on-steel girder bridges.

机译:斜交组合式钢骨板桥的弹性和极限性能。

摘要

An extensive analytical and experimental investigation was undertaken to study the load distribution characteristics of simply supported and two-equal-span continuous skew composite concrete slab on compact steel girder bridges. Detailed parametric studies were conducted to find the effect of several parameters upon the load distribution characteristics in skew bridges at different stages of loading. In this work, both the nonlinear finite element method and the yield-line theory were employed in the theoretical analyses. The finite element method was used to study the behaviour and response of skew composite bridges in the elastic and post-elastic ranges of loading. The nonlinear finite element analysis was also used to conduct a parametric study and to evaluate the ultimate-load capacity of skew bridges. Moreover, the analysis through yield-line theory was utilized to yield different general formulae to predict the failure load of skew composite bridges. The most probable failure patterns were based on both the experimental and parametric studies. Five small-scale models of four-girder and five-girder skew composite bridges were constructed and tested to failure in order to verify the analytical approaches and to study the load distribution characteristics of skew bridges with varying parameters. The tested models were divided into two groups. The first group consisted of three simply supported single span skew composite bridge models with an angle of skew of 45$spcirc$ while the second group consisted of two two-equal-span continuous skew composite bridge models with the same angle of skew as the first group. Good comparisons between the theoretical and experimental results for all five models were shown. The analysis of the results from the parametric study revealed that the ultimate-load capacity and the load distribution characteristics of skew composite bridges are influenced by several factors such as: angle of skew, aspect ratio of the bridge, load position, type of interconnection of different elements of the bridge, continuity, presence of transverse diaphragms, and the sectional moment capacities.Dept. of Civil and Environmental Engineering. Paper copy at Leddy Library: Theses u26 Major Papers - Basement, West Bldg. / Call Number: Thesis1993 .H44. Source: Dissertation Abstracts International, Volume: 55-05, Section: B, page: 1947. Adviser: J. B. Kennedy. Thesis (Ph.D.)--University of Windsor (Canada), 1993.
机译:进行了广泛的分析和实验研究,以研究紧凑型钢梁桥上简单支撑和两等跨连续斜交复合混凝土板的荷载分布特性。进行了详细的参数研究,以发现不同参数对斜桥在不同荷载阶段的荷载分布特性的影响。在这项工作中,非线性有限元方法和屈服线理论都被用于理论分析中。有限元方法被用来研究斜交复合桥在弹性和后弹性荷载范围内的行为和响应。非线性有限元分析还用于进行参数研究和评估斜桥的极限荷载能力。此外,利用屈服线理论进行分析,得出了不同的通用公式来预测斜交复合桥的破坏荷载。最可能的故障模式是基于实验和参数研究。为了验证分析方法和研究不同参数斜桥的荷载分布特性,构建了五个小模型的四梁和五梁斜交复合桥并进行了破坏测试。被测试的模型分为两组。第一组由三个简单支撑的45° sp circ $的单跨斜度复合桥模型组成,第二组由两个具有相同斜度的两个等跨连续斜度复合桥模型组成作为第一组。显示了所有五个模型的理论和实验结果之间的良好比较。对参数研究结果的分析表明,斜交复合桥的极限荷载能力和荷载分布特性受多种因素的影响,例如:斜交角度,桥梁的纵横比,荷载位置,钢筋的互连类型。桥梁的不同元素,连续性,横隔板的存在以及截面矩的承载能力。土木与环境工程系。莱迪图书馆的纸质副本:论文主要论文-西楼地下室。 /电话号码:Thesis1993 .H44。资料来源:国际论文摘要,第55卷,第5节,B,第1947页。顾问:肯尼迪(J. B. Kennedy)。论文(博士学位)-温莎大学(加拿大),1993。

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    Helba Alaa El-Din Ahmed.;

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