Force-Transmitting Retrofit Device for Load-Bearing Construction Elements
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Solution Overview
Problem
Existing methods for connecting load-bearing construction elements, such as a building ceiling and a balcony slab, are complex and do not effectively transmit shear forces while providing thermal insulation and compressive force transmission.
Innovation Solution
A device with an insulation body and force-transmitting means, including a support angle bracket with a slanted shear rod fixed to a cheek, allows for simple retrofitting by absorbing compressive and shear forces, enabling efficient force transmission between the elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex connection device with multiple components is used to connect load-bearing construction elements, then the connection can transmit various forces, but the device configuration becomes complex and difficult to install
Solution Approach 1:
The patent combines multiple force transmission functions (tensile, compressive, and shear force transmission) into a single integrated connection device. The connection element integrates the angle bracket, shear rods, and support structures into one unified component that can transmit all necessary forces simultaneously, eliminating the need for separate components for each force type.
Solution Approach 2:
The connection device is designed as a universal element that performs multiple functions: it provides thermal insulation through the insulation body, transmits tensile forces via embedded sections, transmits compressive forces through the angle bracket and shear rods, and transmits shear forces through the slanted shear rods. This multi-functional design simplifies the overall connection system while maintaining comprehensive force transmission capability.
2Strength
If traditional connection methods are used between construction elements, then the structural connection is achieved, but thermal insulation between the elements is compromised
Solution Approach 1:
The insulation body is nested within the connection device structure, with the angle bracket and shear rods positioned within or around the insulation material. This nested configuration allows the connection elements to be embedded in the insulation body, enabling simultaneous achievement of structural connection and thermal insulation without requiring separate components.
Solution Approach 2:
The connection device combines materials with different properties: the angle bracket and shear rods provide mechanical strength for force transmission, while the insulation body provides thermal insulation. This composite structure integrates load-bearing components with insulating material to achieve both structural and thermal functions in a single element.
3Reliability
If shear rods are fixed to the rear wall of the angle bracket through complex arrangements, then shear force transmission is achieved, but the configuration becomes complicated
Solution Approach 1:
The shear rods are pre-fixed to the angle bracket during manufacturing, with the slanted sections positioned to extend through the rear wall. This preliminary fixation eliminates the need for complex on-site assembly arrangements, as the shear rods are already properly positioned and secured to the angle bracket before installation in the construction joint.
Solution Approach 2:
Instead of fixing the shear rods to the rear wall from the inside, the design allows the slanted sections to extend through the rear wall and be fixed from the outside or to protrude through openings. This inverted approach simplifies the fixation process and allows for more straightforward connection details while maintaining effective shear force transmission.
Data Source
AI summary
A device for retrofitting a second load-bearing construction element to a first load-bearing construction element has an insulation body arranged between the construction elements. Tensile force-transmitting, compressive force-transmitting, and shear force-transmitting elements are provided. The compressive force-transmitting elements include a contact surface, accessible from a longitudinal side of the insulation body, for absorbing horizontal compressive forces of the second load-bearing construction element. The shear force transmitting elements include a support surface, accessible from the longitudinal side of the insulation body, for absorbing vertically oriented forces of the second load-bearing construction element and further include a shear rod connected to the support surface. A support angle bracket has first and second legs and a transversely arranged cheek connecting the first and second legs. The first leg forms the contact surface. The second leg forms the support surface. The shear rod has a slanted section fixed directly to the cheek.