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钢筋混凝土结构施工中,经常出现钢筋混凝土框架大跨梁侧向挠曲变形,小的10～20毫米,大的可达50毫米左右,拆模后可用眼看到。这种变形是钢筋混凝土结构施工中的质量通病之一。现就梁产生侧向挠曲变形的原因、对结构的危害及预防谈几点意见。一、梁侧向挠曲变形产生的原因钢筋混凝土框架施工中,最容易产生框架梁侧向变形的,大多为梁跨大(梁跨8000毫米以上)及梁高、宽比例失调(例如梁高大于600毫米,梁宽小
In the construction of reinforced concrete structures, the lateral deflection of large-span girders of reinforced concrete frames often appears, ranging from 10 to 20 millimeters, up to about 50 millimeters, and can be seen by the eye after demoulding. This deformation is one of the common problems in the construction of reinforced concrete structures. Now we will talk about the reasons for the lateral deflection of the beam, the damage to the structure, and the prevention. 1. Causes of Lateral Deflection Deformation of Beams In the construction of reinforced concrete frames, the lateral deformation of frame beams is most likely to occur. Most of them are beam spans (beam spans over 8000 mm) and the beam height and width are out of balance (eg, beam height More than 600 mm, beam width small