Related Experiment Video
Updated: May 13, 2025
05:26
Determination of the Mechanical Properties of Flexible Connectors for Use in Insulated Concrete Wall Panels
Published on: October 19, 2022
1.5K
Performance of typical structural components in basement-addition for existing building
Ping Zhao1, Youqiang Qiu2, Zhanqi Wang3
1School of Architecture and Engineering, Tongling University, Tongling, 244000, China.
Scientific Reports
|April 14, 2025
Summary
Basement additions can destabilize existing buildings. This study models basement excavation impacts on foundations and columns, finding deeper excavations and initial soil removal cause significant stress and deformation. Monitoring central foundation pit components is crucial for safety.
Area of Science:
- Civil Engineering
- Geotechnical Engineering
- Structural Engineering
Background:
- Urban land scarcity necessitates basement additions to existing buildings.
- Construction of basement additions can compromise the stability of existing foundations and superstructures.
- The precise impact of basement excavation on adjacent structural components requires detailed investigation.
Purpose of the Study:
- To investigate the performance of structural components during basement-addition construction.
- To analyze the stress and deformation characteristics of columns, strip foundations, and reinforcing piles.
- To provide insights for optimizing design and construction of similar projects.
Main Methods:
- Development of a three-dimensional finite element model for a case study.
- Validation of the model against measured data from an actual basement-addition project.
- Simulation of excavation depths to assess impacts on structural components.
Main Results:
- Structural component stress and deformation are highly sensitive to excavation depth, intensifying with increased depth.
- Maximum settlement values were recorded for the strip foundation (-18.6 mm), column foot (-13.79 mm), and pile (-16.1 mm).
- The underground diaphragm wall showed maximum vertical and horizontal displacements of 7.6 mm and 18.1 mm, respectively. Piles experienced compressive forces with minimal sensitivity to excavation depth.
Conclusions:
- Excavation depth, particularly the initial soil layer removal, significantly influences structural component behavior.
- Displacements and internal forces concentrate near the foundation pit's center.
- Enhanced monitoring of central foundation pit components is vital to prevent engineering accidents and ensure structural integrity.
Related Concept Videos
01:16Masonry Loadbearing Walls
90
Masonry load-bearing walls, constructed from materials like brick, stone, or concrete masonry units, serve as a crucial component in building structures by supporting the loads from floors and roofs and transferring them to the foundation. These walls, known for their compressive strength, can be reinforced or unreinforced to suit different building needs, accommodating both the dead and live loads while maintaining safety through lower working stresses compared to the materials' ultimate...
90
01:15Reinforced Brick Masonry
398
Reinforced brick masonry is an advanced construction technique that enhances the structural integrity of brick walls by incorporating steel reinforcements. These reinforcements are either placed within the hollow cores of bricks or sandwiched between two layers of masonry, known as wythes, and are then secured in place with grout. Grout is a fluid mixture composed of Portland cement, aggregate, and water, providing the necessary bonding agent for the steel and brick.
To fortify brick walls...
To fortify brick walls...
398
01:15Posttensioned Masonry Walls
104
Post-tensioned masonry walls use high-strength steel rods or flexible tendons to enhance the strength and efficiency of masonry structures. These elements are securely anchored to the foundation and extend vertically either within the cores of the masonry units or between the masonry wythes. The construction process involves building the wall with these tensioning elements in place and allowing the mortar to fully cure.
Following the curing process, the tensioning begins. Steel rods are...
104
01:23Types of Building Separation Joints
172
Building separation joints divide large or complex building structures into smaller, discrete units that can move independently. These joints are categorized into three types: volume-change joints, settlement joints, and seismic separation joints.
Volume-change joints address the effects of expansion and contraction due to temperature and moisture variations. They are strategically placed at discontinuities in a building's mass where cracking is most likely and are spaced about 150 to 200...
Volume-change joints address the effects of expansion and contraction due to temperature and moisture variations. They are strategically placed at discontinuities in a building's mass where cracking is most likely and are spaced about 150 to 200...
172
01:26Design Example: Sustainability in Concrete Building
144
As the construction industry moves towards more eco-friendly practices, concrete's adaptability and its ability to incorporate sustainable features make it a key material in the drive towards greener building solutions.
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground...
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground...
144
01:20Masonry Curtain Walls
431
Masonry curtain walls employ brick or stone veneers supported by the building's structure to form an external cladding system that is both aesthetically appealing and functional. These walls are erected through two principal techniques, first by traditional layering of masonry units and second by using prefabricated panels. Traditional construction relies on steel shelf angles attached to the spandrel beam for support, with high-bond mortars ensuring secure attachment of masonry veneer...
431