Investigation of Composite Rigid Frame Structure

复合刚架结构研究

• 批准号: 60850086
• 负责人: ABE Hidehiko
• 金额: $ 3.58万
• 依托单位: University of Utsunomiya
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-60850086/
• 关键词: Composite Structure; Bridge Structure; Joint Structure; 耐荷力

In case highway and railway cross each other in grade separation at an acute angle,frame-type intermediate piers and shallow girders are generally required. By using concrete-steel composite structures for this purpose, a good mechanical performance, easier construction and economical merit can be expected. In order to develope this kind of structure, an experimental investigation has been conducted these two years, mainly on joints between concrete parts and steel parts and on composite beams of steel and concrete as described below, In result, possibility to successfully apply the new type structural components to actual structures is thought to have been confirmed.(1) About twenty joint-type specimens, where steel parts were connected with each other by means of concrete and steel elements. They were broadly classified to two types; deformed bars and steel plates with studs as the tension elements in the joint part. The length of steel parts embedded in the concrete, the amount of s … More tirrups and the number of studs were varied. They were loaded with tensile force and appropriate proportions for the joint were selected.(2) Thirteen specimens, where end portions of steel beams were embedded in reinforced concrete beams were tested in bending. The length of steel beam embedded in concrete, the amount of stirrups and the amount of shear connectors were varied. In specimens of shorter embedment without shear connectors, the concrete in the joint part was subject to a large shearing force and accordingly cracked by shearing force or diagonal tension. In order to prevent this type of fracture, a considerable amount of stirrups is needed. But in case a sufficient number of shear connectors was provided, the shearing force acting there was decreased and no shearing type fracture occurred.(3) In a composite beam , where a steel H-beam was embedded in concrete, the influence of position and amount of shear connectors on the mechanical behavior and the ultimate strength was investigated. It was found that the shear connectors planted on the web of the steel H-beam was sufficiently effective. Then, the depth can be reduced in comparison with a beam where connectors are planted on the flange. Also holes bored in the web proved to be as effective as shear connectors. Less

当公路与铁路呈锐角立交交叉时，一般需要采用框架式中间墩和浅梁。采用混凝土-钢组合结构可实现良好的力学性能、施工简便性和经济性。为了开发这种结构，近两年进行了实验研究，主要针对混凝土部件和钢部件之间的接头以及钢和混凝土组合梁，如下所述，结果认为已经证实了将新型结构部件成功应用于实际结构的可能性。（1）大约二十个接头型试件，其中钢部件通过混凝土和钢元件相互连接。它们大致分为两类：接头部分采用带螺柱的变形钢筋和钢板作为受拉元件。嵌入混凝土中的钢部件的长度、箍筋的数量和螺柱的数量各不相同。对它们施加拉力并选择适当的接头比例。(2)对13个钢梁端部嵌入钢筋混凝土梁的试件进行了弯曲试验。埋入混凝土中的钢梁长度、箍筋数量和剪力连接件数量各不相同。在没有剪力连接件的埋置较短的试件中，接缝部分的混凝土受到较大的剪力，从而在剪力或对角拉力的作用下产生裂缝。为了防止这种类型的断裂，需要大量的箍筋。但当提供足够数量的剪力连接件时，作用于该处的剪力减小，不会发生剪切型断裂。(3)在钢H型梁嵌入混凝土的组合梁中，研究了剪力连接件的位置和数量对力学性能和极限强度的影响。结果发现，放置在 H 型钢腹板上的剪力连接器足够有效。然后，与将连接器植入在凸缘上的梁相比，可以减小深度。腹板上钻孔也被证明与剪力连接器一样有效。较少的

项目成果

ABE, Hidehiko: "Experiment on New Type of Composite Joint Structures" Proc. of the Annual Conference of JSCE. Vol.41. 459-460 (1986)

ABE，Hidehiko：“新型复合连接结构的实验”Proc。

ABE, Hidehiko: "Influence of Number of Shear Connectors on Structural Behavior of SRC Beam" Proc. of the Annual Conference of JSCE. Vol.42. (1987)

ABE，Hidehiko：“剪力连接器数量对 SRC 梁结构行为的影响”Proc。

阿部英彦: 土木学会,年次学術講演会講演概要集. 第41回. 455-456 (1986)

Hidehiko Abe：日本土木工程师学会，年度学术会议摘要 455-456（1986）。

ABE, Hidehiko: "Experimental Investigation of Structural Behavior of Joints Between Steel and Concrete under Bending" Proc. of the Annual Conference of JSCE. Vol.42. (1987)

ABE，Hidehiko：“弯曲下钢与混凝土之间的接头结构行为的实验研究”Proc。

阿部英彦: 土木学会,構造工学論文集. Vol.33A. 307-316 (1987)

Hidehiko Abe：日本土木工程师学会，《结构工程汇刊》第 33A 卷（1987 年）。