Reinforcing Equipment for Concrete Node Seismic Resistance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for reinforcing nodes of a not entirely confined type of reinforced concrete frames are invasive, costly, and disruptive to building occupants, as they require extensive external modifications and scaffolding, failing to effectively resist seismic stresses and leaving bars uncovered.
Innovation Solution
The equipment involves creating a prismatic recess in the node with a plate of similar shape and thickness, attached using screws, and covered with a concrete layer to enhance structural integrity and resistance to seismic forces, allowing for internal reinforcement without extensive external modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external reinforcement walls are added to resist seismic stresses, then structural reliability is improved, but device complexity and construction time increase significantly
Solution Approach 1:
The reinforcement system is divided into modular components: steel bars inserted into drilled holes in the pillar, individual node plates welded to the bars, and separate concrete coating layers. This segmentation allows for simpler, more manageable installation compared to constructing entire external reinforcement walls, while still achieving the required seismic resistance through distributed reinforcement at critical nodes.
Solution Approach 2:
The reinforcement structure uses a nested arrangement where steel bars are inserted into holes within the existing pillar, node plates are welded onto these bars, and then concrete coating is applied over the plates. This nested configuration integrates the reinforcement within the existing structure rather than adding external walls, reducing construction complexity while maintaining reliability.
2Reliability
If scaffolding and formworks are used for external reinforcement, then structural reliability is improved, but loss of time and disruption to occupants increase
Solution Approach 1:
Holes are drilled into the pillar and steel bars are inserted beforehand, before the node plates are welded and concrete applied. This preliminary preparation of the reinforcement elements allows for more efficient construction sequencing, reducing the overall time required compared to building external walls with scaffolding and formworks, while ensuring structural safety through proper installation.
Solution Approach 2:
The invention extracts the essential reinforcement function from the complex external wall system, isolating the critical seismic resistance mechanism to drilled holes with inserted bars and node plates. This extraction eliminates the need for extensive scaffolding and formworks, significantly reducing construction time and disruption to occupants while maintaining the core structural safety function.
3Strength
If nodes are reinforced with additional structural systems, then strength is improved, but ease of manufacture decreases due to invasive procedures
Solution Approach 1:
Instead of applying uniform external reinforcement to entire building walls, the invention applies reinforcement locally at critical nodes through drilled holes and welded plates. This localized approach achieves the necessary node strength enhancement while avoiding the complexity of extensive external wall modifications, making the reinforcement process easier to manufacture and install.
Solution Approach 2:
The invention replaces the mechanical system of external reinforcement walls requiring scaffolding and formworks with a simpler drilling, insertion, and welding process. This substitution of construction methods significantly improves ease of manufacture while achieving equivalent or superior node strength through direct reinforcement of the critical structural elements.
4Object-affected harmful factors
If concrete coating is applied over reinforcement plates, then protective function is improved, but manufacturing precision requirements increase
Solution Approach 1:
The node plates are designed with specific geometric parameters including rounded corners with radius R1 and straight edges with length L1, creating a standardized profile that facilitates accurate positioning. When concrete coating is applied over these precisely dimensioned plates, the protection against corrosion is enhanced while the manufacturing precision requirements are managed through the standardized plate design that allows for consistent placement and alignment.
Data Source
Figure 1~9
Figure 1bis
Figure 2~4
AI summary
Equipment (1) for reinforcing a node (N) of a not entirely confined type of a reinforced concrete frame; the node (N) being arranged at the intersection of at least one beam (T1, T2, T3) and one pillar (P) reinforced longitudinally and being delimited externally by a first external face (FE) in which a substantially prismatic recess (R) is obtained delimited peripherally by a surface (S) that has a first perimeter (P1) having a given shape and at the bottom by a second internal face (FI); a plate (10) being peripherally delimited by a second perimeter (P2) having a geometrically similar shape to the first perimeter (P1) and having a given thickness; attachment means (20) being provided for connecting the plate (10) to the second face (FI) .