Arrangement structure for PHC tubular pile shear test

Abstract

The invention discloses an arrangement structure for a PHC tubular pile shear test. The arrangement structure comprises a PHC tubular pile for a test, two inner clamping type support seats, two outerclamping type support seats, a distribution beam and two piers. The PHC tubular pile for the test is horizontally arranged; the two inner clamping type support seats and the two outer clamping type support seats are symmetrically arranged at a position 0.5m away from the two sides of the length center of the PHC tubular pile for the test and the position 0.5m+ shear span B away from the two sidesof the length center of the PHC tubular pile for the test. The distribution beam is arranged on the top surfaces of the two inner clamping type support seats; and the two piers are arranged on the bottom surfaces of the two outer clamping type support seats. The inner clamping type support seats and the outer clamping type support seats are the same in structure and comprise upper half clamping seats, lower half clamping seats and two connecting screw rods. And the two connecting screw rods enable the upper half clamping seats and the lower half clamping seats to tightly hold the PHC tubular pile for the test through an upper nut and a lower nut respectively. According to the structure, a damage mode of the PHC tubular pile in a shear test can be closer to oblique pressure damage or shearpressure damage, and a result of an anti-cracking shear force is more reasonable.

Description

technical field [0001] The invention relates to an arrangement structure for a shear test of a PHC pipe pile. Background technique [0002] PHC concrete pipe pile is a hollow cylindrical prefabricated component made by applying prestressing and centrifugal forming process by pretensioning method in the factory, and it is called prestressed high-strength concrete centrifugal pipe pile after high temperature and high pressure steam curing. This type of pile has high compressive bearing capacity and lower cost than steel pipe piles with the same pile diameter, and is a commonly used component in engineering. However, in areas with high seismic fortification intensity, the requirements for the shear bearing capacity of PHC concrete pipe piles are relatively high, and the application restrictions are relatively large. Therefore, the study on the shear resistance of PHC concrete pipe piles is very important. [0003] The research on the shear performance of PHC concrete pipe pile...

AI Technical Summary

Problems solved by technology

The code stipulates that the shear-span ratio is 1. In theory, an oblique crack extending from the supporting support 4 to the loading place should appear when shear failure occurs. However, in many shear tests, for the 800mm large-diameter PHC pile, the The pile is hollow tubular, and when the PHC pipe pile is compressed, it will be squeezed and deformed, causing the side expansion of the PHC pipe pile and cracking under tension, and horizontal cracks passing through the PHC pipe pile will appear on the side of the pile

According to the requirements of the specification, when the PHC pipe pile cracks, the test is stopped and the corresponding cracking shear force is determined. Therefore, the extrusion and tension cracking of the large-diameter PHC pipe pile affects the failure mode of the PHC pipe pile, and the anti-cracking shear force judgment interferes

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