Concrete beam strengthening structure: Fid-Bau Portal

Concrete beam strengthening structure

MAI JIA'ER / LU XIAOZHI / HE GUANHONG / PEI XINGKAI

The invention discloses a concrete beam strengthening structure. A plurality of steel bars are configured on the periphery of a hole according to the normal stress and structure requirements, and steel angles are arranged on the periphery of the hole to form a concentric-square-shaped strengthening structure. The steel angles are welded to the adjacent steel bars. The steel angles and the steel bars are welded into a whole, the overall stiffness is large, and the bending resistance and shear capacity are superior to those of common steel bars. Thus, through the structure, the bearing capacityof a beam provided with the rectangular hole is higher than that of an opening beam structure provided with inclined steel bars according to existing design. The size and location of the hole can break through the requirements of an existing structure manual. The influence of the hole on the bearing capacity of a reinforced concrete beam is greatly reduced, and the safety use of opening beam is ensured. Meanwhile, the steel angles and the steel bars are simple in arrangement, low in cost and easy to weld and install on site. Manpower and time waste caused by complex procedures such as bindingand fixing the inclined steel bars in the prior art is avoided. The site construction progress is accelerated. The concrete beam strengthening structure is fast and convenient to construct, time-saving and economical.

本发明公开的一种混凝土梁加强结构，在孔洞的周围位置按照正常受力和构造要求配置多个钢筋，并在孔洞周围设置角钢以形成“回”字形加强结构。由于角钢焊接在邻近的钢筋上，角钢与钢筋焊接成一个整体，整体刚度大，抗弯和抗剪能力优于普通钢筋，所以采用这种构造的开矩形孔洞梁的承载能力要高于按照现有设计设置倾斜钢筋的开孔梁结构，开洞尺寸和位置可以突破现有构造手册的要求，大大降低了孔洞对钢筋混凝土梁承载力的影响，保证了开洞梁的安全使用。同时，其角钢和钢筋布置简单，成本较低，现场易于焊接安装，避免了现有技术中对倾斜钢筋绑扎固定等复杂工序带来的人力和时间耗费，加快了现场施工进度，施工便捷，省时经济。

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