Cable-Stayed Suspension Bridge Hybrid Structure for Super Long Spans
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional suspension bridges have limitations in rigidity, deformation, wind stability, and spanning capability, with a maximum span of 2000 m, and high construction costs.
Innovation Solution
A cable-stayed suspension bridge structure with vertically arranged main towers anchored by stay cables, incorporating a longitudinal elastic damping stopper and main bridge vertical support to enhance structural stiffness and stability, allowing for super long spans by distributing load and reducing axial pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If traditional suspension bridge structure is used, then spanning capability is improved with material saving and light weight, but rigidity is small and deformation is large
Solution Approach 1:
The patent merges the suspension bridge system and cable-stayed bridge system into a hybrid structure. The main suspension cables provide the spanning capability while stay cables anchored to towers provide additional rigidity support, resolving the contradiction between long span and high rigidity
Solution Approach 2:
The structure combines different structural systems (suspension and cable-stayed) with complementary mechanical properties. The suspension cables handle tensile loads for spanning while the rigid towers and stay cables provide vertical and lateral stiffness, creating a composite structural system that achieves both long span and high rigidity
2Length of stationary object
If traditional suspension bridge structure is used, then spanning capability is improved, but stability against wind is poor
Solution Approach 1:
The hybrid structure combines the flexibility of suspension bridges with the wind stability of cable-stayed bridges. The rigid towers and dense stay cable arrangement provide excellent aerodynamic stability and wind resistance while maintaining the long spanning capability through the suspension cable system
Solution Approach 2:
The structure changes key structural parameters by introducing rigid vertical towers and multiple stay cables, fundamentally altering the aerodynamic characteristics and stability parameters of the bridge to achieve superior wind resistance compared to traditional suspension bridges
3Length of stationary object
If traditional suspension bridge structure is used, then spanning capability reaches 1000-2000 m, but the span needs to be further improved to super long spans
Solution Approach 1:
The patent combines two proven bridge systems (suspension and cable-stayed) into a hybrid configuration that leverages the strengths of both. This merging enables super long spans by distributing loads more efficiently across the structure, reducing the complexity of individual components while achieving greater overall span capability
4Quantity of substance
If traditional suspension bridge structure is used, then material saving and light weight are achieved, but construction cost is relatively high
Solution Approach 1:
The hybrid structure merges the material efficiency of suspension bridges with the construction advantages of cable-stayed bridges. The standardized tower and stay cable components can be manufactured and installed more efficiently than traditional suspension bridge components, reducing construction costs while maintaining material savings
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The cable-stayed suspension bridge achieves greater load-bearing rigidity, improved wind resistance, reduced construction costs, and extended spanning capability up to 3000 m to 5000 m, addressing the limitations of traditional suspension bridges.
Implementation Method 1
a longitudinal elastic damping stopper... to keep the main beam stable in the longitudinal direction
Implementation Method 2
a longitudinal elastic damping stopper... to keep the main beam stable in the longitudinal direction
Implementation Method 3
the main beam is kept stable longitudinally by virtue of the geometric stiffness of the cable force of the stay cable
Data Source
AI summary
A cable-stayed suspension bridge structure suitable for super long spans by comprising a horizontally arranged main bridge main beam, wherein vertical main towers are arranged at ends of the main bridge main beam, and each main tower is anchored by stay cables; a main bridge vertical support and a longitudinal elastic damping stopper are arranged at positions of the main bridge main beam close to the main tower, and the main beam is kept stable longitudinally by virtue of the geometric stiffness of the cable force of the stay cable and the longitudinal elastic damping stopper.