Interlocking Masonry Block for Seismic Stability
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Solution Overview
Problem
Existing masonry building techniques face challenges in achieving increased seismic safety and stability, particularly due to the weakness of continuous bed joints during earthquakes, leading to potential collapse and the need for additional complex reinforcement measures.
Innovation Solution
A cuboid building block design with a protruding longitudinal elevation and corresponding recess on the lower surface, featuring dovetail-shaped grooves for enhanced interlocking and minimal perforations to maximize material density and strength, allowing for improved seismic safety without additional work steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If continuous mortar joints are used in masonry construction, then construction is simplified, but earthquake resistance and structural stability deteriorate
Solution Approach 1:
The building block is divided into segments with protruding elevations and corresponding receptacles that create interrupted bed joints. This segmentation breaks the continuous mortar joints into discontinuous segments, preventing fracture propagation while maintaining construction simplicity through standardized block designs.
Solution Approach 2:
The building block incorporates localized features such as protruding elevations at specific positions, dovetail-shaped grooves at joint interfaces, and selective perforation patterns. These local quality modifications enhance earthquake resistance at critical locations without compromising overall construction simplicity.
2Reliability
If reinforcing bars are inserted into vertical holes to create prestressed masonry, then earthquake resistance improves, but construction complexity and work time increase
Solution Approach 1:
The building block itself provides the reinforcement function through its integrated protruding elevations and receptacles that create mechanical interlocking. The block structure serves its own reinforcement needs without requiring additional reinforcing bars or complex prestressing systems, thereby maintaining construction simplicity while achieving improved earthquake resistance.
3Adaptability or versatility
If building blocks have large perforations for ventilation, then air circulation improves, but mass and structural strength decrease
Solution Approach 1:
The building block utilizes controlled porosity with small perforations (maximum 5% of total volume) strategically positioned away from critical load-bearing areas. This porous structure provides minimal ventilation while maintaining high structural strength through the predominant solid material volume and optimized perforation placement.
Solution Approach 2:
Perforations are localized to specific non-critical regions of the building block, allowing air circulation in areas that do not compromise structural integrity. The dovetail-shaped grooves are also locally positioned at interfaces to enhance bonding without reducing overall block strength.
4Reliability
If blocks are made with high material density for strength, then seismic safety improves, but weight increases
Solution Approach 1:
The building block optimizes the parameter of material density by maintaining high density (minimal perforations) to achieve improved seismic safety. The design accepts the consequence of increased weight as a necessary trade-off for enhanced earthquake resistance, rather than attempting to reduce weight through excessive perforation.
Data Source
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AI summary
The invention relates to an earthquake-proof building block. A block (1) for a masonry comprises at least a projecting portion (3) formed in the longitudinal direction on the upper surface and a corresponding recess or containing portion (5) on the lower contact surface, the containing portion is adapted to the upwardly projecting portion of another same block arranged below. The percentage by volume of free volume in the block in a row of perforations (13) has less than 5% of the total volume of the block (1).