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Approach to the Unified Evaluation of Ultimate Strength of Steel Framed Structures

钢框架结构极限强度统一评价方法

基本信息

批准号：
62302040
负责人：
FUKUMOTO Yuhshi
金额：
$ 6.08万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Co-operative Research (A)
财政年份：
1987
资助国家：
日本
起止时间：
1987 至 1989
项目状态：
已结题

项目摘要

By the co-operative research works during three years from 1987 to 1989, the following major results are obtained; (1) The SGSR format is examined as the design formula for the limit state design of steel structural members. The nominal strength and resistance factor for each member are obtained by the experimental data or numerical calculations. (2) The basic strength of compression plates from experimental data-base was improved and the revised basic strength curve is verified by the numerical analysis. (3) The unified expressions on the plate strength under combined forces and the local buckling strength of thin-walled sections are suggested. (4) The evaluation methods on the ultimate strength of stiffened plate under uniaxial compression, bending, shearing and combined forces are also proposed. (5) The basic strength curves for columns and beams are discussed by the comparison between the experimental data-base and the numerical simulation, and three column curves and two bean curves classified by cross-sectional shape and manufacturing process are proposed. (6) The appropriate expressions on the interaction strength formula of beam-colons under both uniaxial and biaxial bendings are proposed by the numerical and experimental investigations. (7) The evaluation methods on the ultimate strength of framed structures, arches, plane frames and grillage girders are developed. (8) A new method for the strength design of plate girders is developed. This includes the proposal on the optimum location and rigidity of stiffeners. (9) A proposal to the provisions on the limit state design of structural members is examined in accordance with SGST format.

通过1987 ~ 1989年三年的合作研究，取得了以下主要成果：（1）对SGSR格式作为钢结构构件极限状态设计的设计公式进行了探讨。各构件的名义强度和抗力系数由试验数据或数值计算得到。(2)对实验数据库中的受压板基本强度进行了修正，并通过数值分析验证了修正后的基本强度曲线。(3)提出了组合载荷作用下板的强度和薄壁截面局部屈曲强度的统一表达式。(4)提出了加筋板在单轴压缩、弯曲、剪切及复合载荷作用下的极限强度计算方法。(5)通过试验数据库与数值模拟的比较，讨论了柱和梁的基本强度曲线，提出了按截面形状和制造工艺分类的三条柱曲线和两条梁曲线。(6)通过数值计算和试验研究，提出了在单轴和双轴弯曲条件下梁-柱相互作用强度公式的合理表达式。(7)提出了框架结构、拱、平面框架和格构梁极限承载力的计算方法。(8)提出了一种板梁强度设计的新方法。这包括对加强筋的最佳位置和刚度的建议。(9)根据SGST格式，对结构构件极限状态设计的规定提出了建议。