槽钢套筒约束一字形纯钢屈曲约束支撑抗震性能研究

摘要：现有的纯钢型屈曲约束支撑外围约束套筒在加工中存在制作复杂，焊缝多，核心单元和外围约束套筒之间组装复杂，加工工期长，加工制作成本较高，这将不利于标准化作业和大规模生产。但是当屈曲约束支撑受到轴向力作用时会发生整体屈曲与局部屈曲。现有的纯钢型屈曲约束支撑，都是通过加劲板等构造措施限制了核心单元的这两种屈曲破坏模式的发生。常见的核心单元有“一”字形板和“十”字形组合断面等。但是现有的纯钢型屈曲约束支撑在设计时都忽略了一个重要问题，即没有利用核心单元自身抵抗局部屈曲的能力，加劲约束措施一般采用面面接触，即加劲约束单元在核心单元的整个外表面都紧贴约束，这将不可避免造成钢材的浪费。相比较现有屈曲约束支撑的缺点，槽钢套筒约束一字形纯钢屈曲约束支撑方便生产及施工，并且可以节省大量材料的，同时还可以完全通过自身构造起到稳定约束作用，本文的目的在于研究其抗震性能。71772

毕业论文关键词：屈曲约束支撑；核心单元；槽钢

Study on seismic behavior of restrained braces

restrained by channel steel sleeve in “line” shape pure steel

Abstract: Pure steel buckling restrained the supporting sleeve periphery constraint welds in complex production, processing, between the core unit and the peripheral sleeve assembly constraint processing complex, long construction period, the manufacturing cost is high, it will not help the work standardization and mass production. But when buckling restrained braces are subjected to axial force, overall buckling and local buckling occur. The existing pure steel type buckling restrained braces, which are constructed by stiffening plate, limit the two buckling failure modes of the core element. The common core units are “line” shape board and “coner” shape combination section. But the pure steel buckling restrained the existing support in the design have overlooked an important problem, ability is not using the core unit its resistance to local buckling, the stiffening restraint measures commonly used face-to-face contact, namely the stiffening constraint unit in the whole outer surface of the core unit are attached tightly constrained, it will inevitably cause material waste. Compared with the existing shortcomings of the BRB, a steel sleeve shape constraint steel BRB convenient production and construction, and can save a lot of material, but also can fully play through their own structural stability constraints, the purpose of this paper is to study its anti shock performance.

Keywords: Buckling restrained brace ；Core unit ；Channel

1 屈曲约束支撑技术领域简介 1

1.1 抗震设防理念 1

1.2 屈曲约束支撑概念提出 1

1.3 屈曲约束支撑构件介绍 1

1.3.1 构件类型及组成 1

1.3.2 基本工作原理 2

1.3.3 产品优点 2

1.4 屈曲约束支撑工程应用 3

2 发展历程 5

2.1 国外发展槽钢套筒约束一字形纯钢屈曲约束支撑抗震性能研究:http://www.youerw.com/gongcheng/lunwen_81496.html