Seismic Bracket for Pile-Pile Cap Interface
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Solution Overview
Problem
Existing pile supported structures, such as docks and piers, are prone to failure during seismic events due to the separation of pilings from pile caps, leading to safety risks and structural instability.
Innovation Solution
A bracket system comprising two halves with tubular bases and U-shaped flanges is designed to be coupled around the circumference of a pile and the longitudinal section of a pile cap, providing enhanced stability and resistance to seismic forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional pile supported structures are used, then construction simplicity and initial cost are maintained, but structural stability and safety during seismic events deteriorate due to piling separation from pile caps
Solution Approach 1:
The bracket system is pre-installed on the pile cap before the piling is installed. This preliminary action ensures that the connection mechanism is already in place to prevent separation during seismic events, rather than attempting to retrofit or repair after damage occurs
Solution Approach 2:
The bracket acts as an intermediary component between the pile cap and the piling. It provides a mechanical connection that prevents direct separation while allowing for controlled movement, thereby maintaining structural integrity without requiring the piling to be directly attached to the pile cap
2Reliability
If known seismic upgrades are installed, then structural reliability during seismic events is improved, but installation cost and time increase significantly due to required disassembly and reassembly
Solution Approach 1:
The bracket is installed on the pile cap before the piling is placed, eliminating the need for disassembly of the structure during upgrade installation. This preliminary installation approach allows seismic reinforcement to be added without closing access or disrupting operations
Solution Approach 2:
The bracket system is designed as separate, modular components that can be independently installed on the pile cap. This segmentation allows for easy installation without requiring disassembly of the entire structure, reducing both time and cost of implementation
3Reliability
If known seismic upgrades are installed, then structural reliability during seismic events is improved, but installation cost and time increase due to required disassembly and reassembly
Solution Approach 1:
The bracket is pre-installed on the pile cap before the piling is placed, eliminating the need for disassembly of the structure during upgrade installation. This preliminary installation approach allows seismic reinforcement to be added without closing access or disrupting operations
Solution Approach 2:
The bracket serves as an intermediary component that facilitates easy installation of seismic reinforcement. It provides a standardized connection interface between the pile cap and piling, simplifying the installation process without requiring complex disassembly or custom fabrication
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 bracket system effectively reduces strain at the interface between the pile and the pile cap, preventing separation and maintaining structural integrity during seismic events, thus ensuring safety and reducing repair costs.
Implementation Method 1
the bracket may include portions of material with a different composition or material properties and characteristics than the remainder of the bracket... the second section (316) may include a second material with different properties and characteristics than the first section (314)... including a selected modulus of elasticity, tensile strength, or yield strength
Data Source
AI summary
A seismic remediation device includes a body with a first half and a second half structured to be coupled to the first half around an interface between a pile and a pile cap in a pile-supported structure. Each half of the bracket includes a base with a hollow half cylinder shape and an upwardly facing U-shaped flange coupled to the base. The bases of the halves of the bracket are securable around at least a portion of circumference of a pile and the upwardly facing U-shaped flanges of the halves of the bracket cooperate to receive a longitudinal portion of the pile cap. The halves of the bracket being coupleable to each other proximate the interface between the pile and the pile cap.