C-Channel Composite Beam Assembly for Multi-Floor Structural Stability
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Solution Overview
Problem
Conventional structural members, such as steel-concrete composite beams, are often heavy and expensive, and the end-to-end attachment of structural members can result in joints with weak shear strength, particularly in multi-story structures.
Innovation Solution
A structural member assembly comprising a unique assembly of C-shaped channel members that cooperate to define an interior passage, with an inner member extending through the passage and attaching to the channel members, optimizing strength and constructability while reducing material costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional steel-concrete composite beams are used, then structural strength is achieved, but weight and cost increase substantially
Solution Approach 1:
The beam is divided into multiple C-shaped channel members that are assembled end-to-end to form the complete structural member. Each channel member is a separate component that can be manufactured independently and then joined together, allowing for reduced individual component sizes and weights while maintaining overall structural strength through the composite assembly.
Solution Approach 2:
The beam utilizes a composite construction combining C-shaped channel members (steel) with concrete filling the interior passage. This composite material approach leverages the tensile strength of steel and compressive strength of concrete to achieve high overall beam strength while using lighter materials compared to conventional solid steel beams.
2Adaptability or versatility
If structural members are attached end-to-end, then columns and frames can be formed, but joint shear strength becomes weak
Solution Approach 1:
An inner member is nested within the interior passage formed by the C-shaped channel members. This inner member extends through the length of the beam and provides continuous internal reinforcement that strengthens the joints between adjacent channel members, preventing weak shear strength at the connections while still allowing the modular end-to-end assembly configuration.
3Strength
If heavy steel beams are used, then sufficient strength is achieved, but construction cost increases
Solution Approach 1:
The beam is segmented into multiple C-shaped channel members that can be manufactured using standardized, cost-effective processes. These modular components are then assembled end-to-end with the inner member, reducing the need for expensive heavy steel beams while maintaining structural strength through the composite construction approach.
Solution Approach 2:
The composite construction using C-shaped channel members and concrete provides sufficient structural strength at lower material cost than conventional heavy steel beams. The standardized channel members and concrete filling process are more economical to manufacture and install, reducing overall construction costs while achieving the required beam performance.
Data Source
AI summary
A multi-floor structural assembly including a foundation level, a support column including a plurality of outer hollow longitudinal structures defining an interior passage, and a plurality of inner members. The plurality of outer hollow longitudinal structures are aligned end-to-end along a single axis, and the plurality of inner members are aligned end-to-end within the interior passage of the support column so that at least one end of at least one inner member is longitudinally offset from every longitudinal end of the plurality of outer hollow longitudinal structures: A first composite deck includes a first horizontal beam and a hold down bracket secures the column to the foundation. The support column extends upwardly beyond the horizontal beam of the first composite deck.