Design method of wind-resistant system with pipeline suspended cable crossing structure

Abstract

The invention relates to a design method of wind-resistant system with pipeline suspended cable crossing structure, which comprises: step 1, drawing out the curve elements of horizontal wind resistance cable and conjugate cable; step 2, establishing a finite element model and vibration characteristics thereof; step 3, preliminarily drawing up a model of horizontal wind-resistant cable and conjugate cable; step 4, determining the pre-tension of the horizontal wind-resistant cable and the conjugate cable; step 5, designing a wind cable steering bracket; step 6, assembling a scale model of pipeline suspended cable crossing structure wind-resistant system and carrying out wind tunnel test, verifying the wind-resistant safety performance of the scale model under the limit state; step 7, calculating the cable force of the ultimate main cable, the horizontal wind resistant cable and the conjugate cable, and designing a main cable anchor pier, a conjugate cable anchor pier and a wind cable anchor pier. The design method of wind-resistant system with pipeline suspended cable crossing structure achieves the purpose of resisting horizontal wind load and wind load lifting force, improving thelateral and vertical stiffness of the pipeline suspended cable crossing structure, and providing a new way for solving the problem of wind resistance safety of the pipeline crossing structure under the condition of canyon topography.

Description

technical field [0001] The invention relates to a design method for a wind resistance system of a pipeline suspension cable spanning structure, and belongs to the field of oil and gas pipeline spanning engineering design. Background technique [0002] Pipeline suspension cable spanning engineering is one of the most commonly used methods for long-distance oil and gas pipelines to cross rivers. The suspension cable spanning structure has the characteristics of strong spanning capacity, low structural stiffness, and low damping. It is extremely sensitive to wind loads, especially in canyon river areas. Influenced by canyon wind, structural wind-induced safety is one of the most concerned aspects of pipeline spanning projects. In the past engineering design, the wind-resistant cable system with a large angle with the horizontal plane was generally adopted or the bridge deck structure with high rigidity was adopted. However, due to the influence of the terrain of the canyon, the...

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Problems solved by technology

In the past engineering design, the wind-resistant cable system with a large angle with the horizontal plane was generally adopted or the bridge deck structure with high rigidity was adopted. However, due to the influence of the terrain of the canyon, the conventional wind-resistant cable layout is extremely difficult, and the installation of wind-resistant cables is extremely difficult. However, it cannot provide sufficient lateral and vertical rigidity, and at the same time, the bridge deck structure with higher stiffness will bring higher engineering costs

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