Dry Connection Steel-Concrete Composite Beam Assembly
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Solution Overview
Problem
Existing steel-concrete composite beam assembly construction methods are time-consuming and environmentally polluting, requiring extensive on-site work for connecting steel beams and concrete slabs, and are not reusable or easily maintainable.
Innovation Solution
A dry connection prefabricated steel-concrete composite beam assembly using a steel beam, concrete slab, steel plate connectors, shear connectors, and connecting rods, allowing for mechanical assembly and disassembly, reducing on-site construction and enabling reusability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If wet connection method with on-site concrete pouring is used to connect steel beams and concrete slabs, then the connection strength is improved, but construction time increases and environmental pollution occurs
Solution Approach 1:
The beam assembly is divided into separable components: steel beam, concrete slab, and steel plate connector. These segments can be assembled and disassembled independently, enabling rapid on-site assembly without time-consuming concrete pouring while maintaining connection strength through the steel plate connector and shear connectors.
Solution Approach 2:
The steel plate connector and shear connectors are pre-assembled with the steel beam in the factory before delivery to the construction site. This preliminary assembly eliminates on-site steel bar binding and concrete pouring work, significantly reducing construction time while ensuring connection quality through controlled factory conditions.
2Strength
If wet connection method with on-site concrete pouring is used to connect steel beams and concrete slabs, then the connection strength is improved, but environmental pollution increases
Solution Approach 1:
The chemical bonding process of concrete curing is replaced with a mechanical connection system consisting of steel plate connectors and shear connectors. This substitution eliminates the need for on-site concrete pouring and curing, thereby eliminating associated environmental pollution while maintaining robust connection strength through mechanical interlocking and welding.
3Stability of the object's composition
If wet connection method is used to connect steel beams and concrete slabs, then the structural integrity is improved, but reusability and maintainability deteriorate
Solution Approach 1:
The connection system transitions from a static, permanent concrete bond to a dynamic, reversible mechanical connection. The steel plate connector with shear connectors and bolted assemblies allows the structure to be easily disassembled, relocated, and reassembled, enabling reusability and maintenance while maintaining structural integrity through robust mechanical fastening during the assembled state.
4Reliability
If extensive on-site steel bar binding and concrete pouring work is involved, then the connection reliability is improved, but device complexity increases
Solution Approach 1:
Multiple construction operations (steel bar binding, connector installation, concrete pouring, and curing) are merged into a single factory-pre assembled unit. The steel plate connector integrates the steel beam connection, concrete slab attachment, and shear resistance functions into one unified component, simplifying the construction process while ensuring connection reliability through comprehensive factory quality control.
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
This method significantly reduces construction time and environmental impact, facilitates easier maintenance and repair, and allows for the reuse of components, thereby lowering costs and improving prefabrication efficiency in civil engineering.
Implementation Method 1
A shear connector is provided between the lower steel beam and the upper concrete flange slab (concrete slab) so as to resist any separation and/or relative slippage and/or displacement at the joint
Implementation Method 2
a steel plate connector made from steel plates, shear connectors and connecting rods
Data Source
AI summary
A dry connection prefabricated assembly steel-concrete composite beam, comprising a steel beam (400), a concrete slab (300) composed of steel bars (301) and concrete, a steel plate connector (100) composed of a steel plate (101), shear connection pieces (102) and connection rods (103), and a pair of inter-plate connection pieces respectively composed of an upper connection plate (501), a lower connection plate (502), a horizontal connection plate (503), a triangular reinforcing steel plate (504) and first and second shear connection pieces (505, 507). An upper surface of each horizontal connection plate (503) is vertically connected to the upper connection plate (501) and the first shear connection pieces (505), a lower surface is vertically connected to the lower connection plate (502), the triangular reinforcing steel plate (504) is welded between a lower surface of the horizontal connection plate (503) and a side surface of the lower connection plate, and one side surface of the upper connection plate (501) is horizontally connected to the second shear connection pieces (507). Both ends of the steel bars (301), which are laterally preset within the concrete slab (300), are provided with screw threads, and the screw thread ends of the steel bars respectively pass through bolt holes (509) and work holes (5010) arranged at upper ends of the upper connection plates (501) to be fixedly connected via screw nuts (302). The composite beam reduces on-site workload, and facilitates disassembly.