在由石头墙壁支的回填池中观察到的故障机制的数值分析
Adlen Altunbas1, Ozden Saygili2, M Kubilay Kelesoglu3
1Istanbul Medipol University, School of Natural Sciences, Department of Civil Engineering, Kavacik St., No:19, Beykoz, 34810 Istanbul, Turkey.
Anais da Academia Brasileira de Ciencias
|June 21, 2023
概括
墙体的稳定性取决于故障表面的几何形状. 墙壁和填充特性,特别是砂质量,显著影响这种几何形状,偏离了更宽的墙壁的经典理论.
科学领域:
- 地质技术工程 地质技术工程
- 土壤力学 土壤力学
- 结构稳定性 结构稳定性
背景情况:
- 石头支墙是抵御横向地压力的关键结构.
- 准确地确定故障表面几何是确保墙壁稳定的基础.
- 现有的理论可能无法完全捕捉墙系统中复杂的相互作用.
研究的目的:
- 调查墙壁和填充特性如何影响无凝聚力填充中的故障表面几何.
- 分析不同质量的砂和填充密度对墙壁行为的影响.
- 为了比较离散元素方法 (DEM) 的结果与经典的地球压力理论.
主要方法:
- 使用离散元件方法 (DEM) 进行数值模拟.
- 进行了参数研究,从薄弱到强大的墙壁接头 (粘合剂) 类型.
- 研究了松散到密集的填充土壤条件和墙壁填充接口属性.
主要成果:
- 对于薄硬的墙壁,密集的填充故障表面与古典的地球压力理论相匹配.
- 更宽的造墙壁表现出更深更宽的故障表面,特别是在活跃的侧面.
- 砂质量强烈影响变形机制,导致深层或滑动故障.
结论:
- 墙壁和填充特性显著改变了超出经典预测的故障表面几何.
- 砂质量是墙体保持墙体稳定性和故障模式的关键因素.
- DEM是分析支墙中复杂的土壤结构相互作用的宝贵工具.
更多相关视频
相关概念视频
Mortar Joint Deterioration in Masonry
141
Mortar joint deterioration is a significant concern in masonry structures, with water accumulation in the joints leading to damage from freeze-thaw cycles. The repeated expansion of water during freezing and its melting during thawing develop and propagate cracks in the masonry joints. Eventually, this leads to the spalling of mortar from the joints, loosening masonry units and weakening the structure. The deteriorated mortar joints are also vulnerable to moisture intrusion into the walls.
The...
The...
141
Masonry Loadbearing Walls
145
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...
145
Expansion and Contraction in Masonry Walls
992
Masonry walls are subject to slight expansion and contraction due to variations in temperature and moisture. Thermal movement in masonry is relatively straightforward to measure and plan for. On the other hand, moisture movement poses more of a challenge. New clay masonry units typically absorb water and expand over time under normal environmental conditions. Conversely, new concrete masonry units tend to shrink as they lose the excess moisture acquired during their production process.
To...
To...
992
Reinforced Brick Masonry
1.2K
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...
1.2K
Masonry Cavity Walls
1.1K
Cavity walls feature a hollow space between the outer and inner wythes, connected only by corrosion-resistant metal ties. When water seeps through the outer wythe, it descends within this cavity, intercepted by flashing and eventually exiting through weep holes. To enhance moisture resistance, the inner wythe's cavity side often receives damp-proofing, doubling as an air barrier. The cavity can also house insulation to mitigate heat transfer.
Maintaining a clean cavity during construction...
Maintaining a clean cavity during construction...
1.1K
Masonry Curtain Walls
1.1K
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...
1.1K


