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Arch bridge boom anti-relaxation structure system

A hanger and relaxation technology, which is applied in the innovative design field of the internal force control of the hanger rod of an arch bridge, can solve the problems of fatigue failure of the hanger rod, and achieve the effects of improving the internal force of the structure, improving the durability and reducing the amplitude of change of the internal force.

Inactive Publication Date: 2019-04-23
朱婧 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the larger amplitude of internal force change is also prone to fatigue damage of the boom

Method used

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  • Arch bridge boom anti-relaxation structure system
  • Arch bridge boom anti-relaxation structure system
  • Arch bridge boom anti-relaxation structure system

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0016] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0017] refer to figure 1 , 3 The length of the three pairs of suspenders 1 at the end of the tie-rod arch bridge is relatively short, which is highly sensitive to the relative displacement of the beam arch. Rod internal force control system. The suspender 2 in the middle area of ​​the tied arch bridge is longer and less sensitive to the relative displacement of the beam and arch.

[0018] refer to figure 1 , 2 , the tension of the boom is transmitted to the lower backing plate 7 through the spherical hinge, and the lower backing plate 7 transmits the internal force to the spring 4, so that the spring 4 is compressed and deformed, and the internal force in the spring is transmitted to the main beam through the upper backing plate 8. The lateral displacement between the steel beam lower sleeve 6 and the steel beam upper sleeve 5 is constrai...

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Abstract

The invention relates to an arch bridge boom anti-relaxation structure system. An anti-relaxation structure system is arranged at the end of a boom, total rigidity after combination of the anti-relaxation structure system and the boom is regulated so as to control inner force change amplitude of the boom, therefore, relaxation due to too small pull force of the boom under live load is prevented, further, fatigue stress amplitude in the boom is reduced, and anti-fatigue performance of the boom is improved. Through adoption of the arch bridge boom anti-relaxation structure system, rigidity and internal force of the structure can be improved, pull change amplitude of the boom under live load is controlled so as to enable inner force of the boom to be in an expected state, and the anti-fatigueperformance of the boom is improved. The arch bridge boom anti-relaxation structure system is economical and practical, is highly operable and adaptive, and has very high promotion and application values particularly for short suspension cables at two ends of the arch bridge.

Description

technical field [0001] The invention relates to an innovative design of internal force control of an arch bridge suspender. Background technique [0002] Due to the beautiful lines and reasonable stress, arch bridges are widely used in medium and long-span bridges and landscape bridges. Among them, the under-supported arch bridge and the intermediate-supported arch bridge connect the arch ribs to the main girder through a certain number of suspenders. The main girder can be regarded as A continuous beam elastically supported by suspenders. When the wheel load acts on other areas of the main girder and the main girder near the side cable moves upward, the relative displacement between the main girder and the arch rib decreases, and the tension of the boom decreases. Due to the short length of the side cables and high vertical stiffness, the amplitude of the internal force in the suspender varies greatly. If the change is close to or equal to the internal force of the suspend...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D4/00E01D19/00
CPCE01D4/00E01D19/00
Inventor 不公告发明人
Owner 朱婧
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