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针对实际工程中型钢构件穿孔补强的常规做法可能造成现场焊接工作量大、钢筋排布困难等问题,提出补强板和型钢板叠合穿孔,补强板以正面角焊缝或周边角焊缝的形式与型钢板连接补强的两种做法。对两组共4个采用建议做法补强的H型钢穿孔补强柱进行轴压试验和有限元分析,并与相同尺寸的未穿孔柱、穿孔但不补强柱以及采用常规做法补强柱进行了有限元比较分析。结果表明:采用两种建议做法补强的柱承载力和延性相对于相同尺寸的未穿孔柱不降低;在弹性阶段,补强板和型钢故能有效地共同工作,但当补强板仅采用正面角焊缝连接时,在构件屈服后补强板可能出现外拱现象,且随着补强板尺寸增大,外拱现象愈加明显。综合考虑穿孔补强方式的施工方便及补强效果,补强板和型钢板叠合穿孔、补强板围焊连接的补强方式具有较好的实用性。
Aiming at the problems of large amount of welding work and difficult arrangement of steel bars in the actual project, the conventional practice of perforation reinforcement in medium-sized steel members is proposed. The reinforcement plates and the steel plates are superimposed and perforated. Seamless steel plate connection and reinforcement in the form of two practices. A total of 4 H-beam perforation reinforced columns reinforced with the recommended practices were tested for axial compression and finite element analysis in two groups and were compared with uncoated columns of the same size, with perforations but no reinforcing columns, and with conventional practices Finite element analysis. The results show that the bearing capacity and ductility of the columns reinforced by the two proposed methods are not lower than those of the non-perforated columns of the same size. In the elastic phase, the stiffeners and the sections can effectively work together. However, When the front fillet weld is connected, the outer arch may appear in the stiffener after yielding of the component, and as the stiffener size increases, the outer arch phenomenon becomes more obvious. Considering the perforation reinforcement method of construction convenience and reinforcement effect, reinforcement plate and steel plate superimposed perforation, reinforcement plate welding connection reinforcement has good practicality.