Self-resetting assembled pier column system with seismic mitigation and isolation functions

Abstract

The invention discloses a self-resetting assembled pier column system with seismic mitigation and isolation functions. The self-resetting assembled pier column system comprises a prefabricated reinforced concrete pier column section, a seismic mitigation and isolation rubber support, epoxy resin glue, a shape memory alloy bar, a grouting sleeve, a bearing platform, a reserved notch, a water stop tape, a drainage groove and a high-strength bolt. A circle of shape memory alloy bars are added into a reinforcement cage when the prefabricated reinforced concrete pier column section 1 is prefabricated; the reserved notch is formed in the connecting position of the prefabricated reinforced concrete pier column section and the bearing platform, the seismic mitigation and isolation rubber support is arranged in the center of the reserved notch, and the seismic mitigation and isolation rubber support and a padstone reserved on the bearing platform are connected together in the modes of welding, bolting, cementing and the like. During assembly, an SMA bar is inserted into the grouting sleeve pre-embedded in a bearing platform, and the seismic reduction and isolation rubber support and the prefabricated reinforced concrete pier column section 1 are connected together through the epoxy glue, the high-strength bolt and the like. The system has the characteristic of integrating the functions of shock absorption, shock isolation, self-resetting and the like.

Description

technical field [0001] The invention relates to a self-resetting assembled pier column system with the function of shock absorption and isolation, belonging to the field of engineering earthquake resistance. Background technique [0002] At present, my country has entered a stage of rapid urbanization. As of 2021, my country's urbanization rate has exceeded 60%, and the contradiction between urban development and people's daily travel needs and traffic congestion and travel inconvenience has existed for a long time. Therefore, our country also needs to vigorously build transportation facilities, especially urban transportation facilities. Urban bridge facilities have become one of the preferred transportation facilities for saving space. The traditional bridge construction method based on cast-in-place concrete has the characteristics of large construction noise pollution, many auxiliary facilities, large construction area, and great impact on ground traffic. Therefore, it...

AI Technical Summary

Problems solved by technology

Under the action of earthquakes, common prefabricated concrete joints are prone to problems such as plastic hinge transfer, cracking at joints, and large residual displacements.

However, the significant difference between the seismic performance of existing prefabricated concrete piers and cast-in-place piers seriously restricts the application of prefabricated piers in complex and harsh environments such as medium and high intensity.

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