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Structural failures occur when a component or system within a building or infrastructure collapses or fails to perform its intended function. These failures can be attributed to various factors, including design errors, construction defects, material
Carbonation-induced corrosion often occurs on building facades with shallow concrete cover. (70157) Carbonation of concrete also lowers the amount of chloride ions needed
This section includes the following key concepts: 1) factors influencing the strength and stability of the reinforced concrete sections, 2) considerations when assigning failure
Guidance on the use of these case studies to recognize causes of failures is presented, with emphasis placed on the fact that multiple factors (such as design errors,
Failures in Concrete Structures. Case Studies in Reinforced and Prestressed Concrete. By Robin Whittle. Edition 1st Edition. First Published 2012.
RCC failure refers to the loss of structural integrity or the inability of Reinforced Cement Concrete (RCC) elements to perform their intended function. It
Understanding and recognizing failure mechanisms in concrete is a fundamental pre-requisite to determining the type of repair, or whether a repair is feasible. This book provides a review of concrete deterioration and damage, as well as looking at the problem of defects in concrete. It also discusses condition assessment and repair
This paper examines and provides a robust solution to the problem of yield and failure curvatures of reinforced concrete (RC) cross-sections, taking into account cracking. At the same time, it calculates the corresponding necessary reinforcement or the moment of resistance in both yield and failure limit states. Computationally, the problem
Tensile spalling failure is due to the stress wave effect (stress wave propagation and reflection) and is commonly observed in the free end of the concrete structure, such as the internal surface of the concrete silo in the current study, as shown in Fig. 10. Since no structural effect has been involved, variations of the explosive position
1. Introduction. Concrete is widely used in civil and hydraulic engineering due to its advantages of rich of raw materials, low cost, high strength and excellent durability [1].Concrete is considered as a heterogeneous quasi-brittle composite material, which is made of cement, water, aggregate, sand and other materials in a certain proportion, and
Recent high-profile concrete material failures, including the collapse of parts of public buildings in the UK, have highlighted the need for investment in understanding and ensuring the durability
In the present section a triaxial damage-plastic model for concrete failure is developed. The plastic part of the model is based on the effective stress and is defined by the yield function, the flow rule, the evolution law for the hardening variable, and the loading–unloading conditions as stated in (2), (3), (4),
Simulation of structural delayed The delayed failure behavior of the same frame structure is now investigated. In the simulation, the bottom of the middle column is set free to move. A linearly ramped load is applied to the top of the middle column until reaching the pre-set load P, and is then held constant all the way till
Structural failure can result in collapse of the tested element which can compromise adjacent structural elements. Also, since test loads create large stresses in the structure, there is a risk for falling hazards such as pieces of concrete spalled from the structure, or for flying hazards such as strained pieces of the test
63 structures does not lead failure of the whole structure [8]. This is a shift from traditional 64 views in design practice where local failures in construction works were generally assumed
Wrapping FRP fabrics around columns increases the shear and axial strength to improve ductility and energy dissipation behavior. The most common FRP systems for concrete strengthening applications are carbon fiber based (CFRP). Carbon has superior mechanical properties and higher tensile strength, stiffness, and durability compared with glass
Facilities engineers and inspectors at Army installations are responsiblc tor monitoring the condition of concrete building components under the general requirements of Army Regulation (AR) 420-70, Facilities Engineering, Buildings and Structures. However, no organized method currently exists for the visual examination of structural concrete
A reinforced concrete member can fail mostly in the following cases: 1. When the member is subjected to excessive tension, so as to exceed the permissible stress in steel. 2. When the loading is such that the compressive stress in concrete exceeds its safe permissible value. 3. On account of the slipping of the steel bars from concrete. Powered
Concrete, as a material with easy access and strong plasticity, has become one of the most widely used materials in modern architectural structures [1,2,3].However, due to the heterogeneity and low tensile strength of concrete materials, cracks are easily generated during concrete service, and the development of cracks will lead to the
In this work, the described RoM for reinforced concrete structures has been integrated into the FEM–DEM approach presented in Section 2.2.2. In Algorithm 1 we summarize the solution scheme of the extended FEM–DEM method used here to model the failure mechanisms of
Structural failure during 3D concrete printing (3DCP) process due to the competition of two mechanisms, the elastic buckling and plastic collapse, has been largely observed in the experiments. Prediction of this phenomena has become as consequence an important task of this
The simulation yields the stress-life curve, which is an essential metric describing the delayed failure behavior of concrete structures. Discover the world\'s research. 25+ million
A reinforced concrete member can fail mostly in the following cases: 1. When the member is subjected to excessive tension, so as to exceed the permissible stress in steel. 2. When the loading is such that the compressive stress in concrete exceeds its safe permissible value. 3.
The failures in concrete structures always involve in large strain which results in the mesh entanglement and distortion that can prematurely terminate the numerical analysis when using the finite element method. Therefore, an element erosion technique must
Concrete, as a material with easy access and strong plasticity, has become one of the most widely used materials in modern architectural structures [1,2,3].However, due to the heterogeneity and low tensile strength of concrete materials, cracks are easily
🕑 Reading time: 1 minuteDifferent types of defects in concrete structures can be cracking, crazing, blistering, delamination, dusting, curling, efflorescence, scaling and spalling. These defects can be due to various reasons or causes. Causes for Defects in Concrete Structures
Conditions for crack propagation in the porous structure of hardened cement paste and in a matrix with inclusions are studied analytically. By using the derived formulae crack formation and failure of lightweight, normal, and high strength concrete are discussed. Computer experiments
Among these failure modes, premature failures are of major concern, which include FRP Plate Debonding (PD) and Concrete Cover Delamination (CCD), [3], [4]. While these failure modes are common when the strengthening technique is using FRP sheets, other
Based on the meso-scopic random aggregate structure of concrete, Zhou and Hao [20], [21] simulated the dynamic cylinder splitting test and analyzed the dynamic tensile behavior of concrete. Due to the complexity of concrete, the failure phenomena can be studied
1. Introduction. Concrete is a widely used building material, and concrete structures naturally face many challenging conditions such as chemical corrosion, carbonization, frost, fire, etc. [13], [28], [29], [8].The resulting damage may exacerbate the stress, weaken the integrity
Concrete structures are susceptible to damage over time due to their inherent properties, such as low tensile strength, small fracture energy, brittleness, poor toughness, and wide cracks. This can occur through various modes of failure (Ahmadi et al., 2021; Zhu et al., 2021b
Facilities engineers and inspectors at Army installations are responsiblc tor monitoring the condition of concrete building components under the general requirements of Army Regulation (AR) 420-70, Facilities Engineering, Buildings and Structures. However, no organized method
