墩塔钢筋部品优化设计与受弯力学性能试验研究.

In order to promote the industrialization development of reinforcement in pier towers, three kinds of structural optimization design of reinforcement parts were proposed. Taking the connection mode of main reinforcement and stirrup, stirrup structure and stiffness skeleton as parameters, the four-point bending test of two reinforced concrete beams was carried out (the new reinforced concrete beam was referred to as the new beam, and the traditional tied reinforced concrete beam was referred to as the traditional beam), and the bending mechanical properties of the optimized design structure of the new pier tower reinforcement parts were studied. The test results show that the crack distribution of the traditional beam is denser than that of the new beam, the peak load of the traditional beam is about 5% higher than that of the new beam, and the ductility of the traditional beam is slightly higher than that of the new beam. The reinforcement strain of the two specimens is basically consistent with the variation load. Under the same load, the stirrup strain of the new beam is about 50% (500 με) larger than that of the traditional beam, and the stirrup restraint capacity and load sharing ratio of the new beam are higher. In general, the bending resistance mechanical properties of the new beam are basically the same as those of the traditional beam. The welded connection of the main stirrups of the pier tower and the new stirrup structure can be used in practical engineering. [ABSTRACT FROM AUTHOR]