What Are The Three Damage Situations Of The Existing Reinforced Concrete Awning
Effects of deep excavation on seismic vulnerability of existing
The excavation is planned to be carried out employing a top-down method with reinforced concrete slurry walls permanently supported by two thick reinforced concrete slabs, respectively, at the top and bottom of the open pit, and four levels of temporary struts later substituted by permanent reinforced-concrete walls (Table 2). …
Monitoring the damage evolution of reinforced concrete …
Reinforced concrete (RC) structure is widely used in the construction of various large-scale infrastructures, such as bridges, tunnels, and other projects because of its low cost, easy molding, and high compressive strength [1], [2], [3].However, under the influence of external overload, improper construction, and other adverse factors, these …
Rehabilitation of a reinforced concrete frame using …
Existing reinforced concrete (RC) frame buildings with nonductile detailing represent a considerable hazard during earthquakes. This type of building suffered severe damage and was responsible for most of the loss of life during recent seismic events such as the 1985 Mexico and 1999 Kocaeli (Turkey) earthquakes.
Deterioration processes in reinforced concrete: an overview
Abstract: The various mechanical and physicochemical processes that induce the degradation of the material condition of reinforced concrete (RC) structures are …
Experimental study on the damage permeability of polypropylene fiber
In particular, the damage and permeability study of reinforced concrete mixed with PPF is ambiguous, and the action of various water pressures on this material is rarely reported. Based on the above situation, this paper firstly summarized the existing methods of obtaining and characterizing concrete damage cracks.
Investigating Partial Factors for the Assessment of Existing Reinforced
In this study, the concept of fuzzy mathematics was applied to the damage evaluation of existing reinforced concrete (RC) bridges. The partition rule of evaluation grade was used to divide the ...
Steps for Concrete Damage Repair in Reinforced …
Repair of concrete is needed from time to time as the structure gets old due to several reasons. The steps of concrete repair include- investigating the cause behind the defect in concrete, assessing the extent and …
Seismic retrofitting of existing reinforced concrete building
The three dimensional reinforced concrete structures are anatomized by nonlinear static analysis( Pushover Analysis) using SAP2000 software. The analysis results showed the performance situations, geste of the factors, failure medium and sequence of hinge conformation of the structure
Gravity-Load-Designed Reinforced Concrete Buildings--Part …
The American Concrete Institute. Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for …
Repairs and Rehabilitation of Concrete Structures …
Removal of all loose and damaged concrete using mechanical means or water jet. Surface to be dried. A suitable epoxy resin [unmodified solvent less epoxy resin + polyamide hardener (special grade)] is applied with …
Concrete Damage Risk Rating Examination to Existing …
Concrete damage on reinforced concrete structures cannot be avoided. This is caused by a lot of factors, one of which is poor construction implementation and low material quality. As time goes on, existing building usage also predominantly affects the building's condition. Improper building usage will cause physical damage to the building itself.
Damage evaluation of lightly reinforced concrete walls in …
Lightly reinforced concrete (LRC) walls have been widely used in reinforced concrete (RC) buildings in Japan as partitions and enclosure walls. Despite their contributions of considerable strength and stiffness to the structural system, they are generally classified as nonstructural elements and are not considered in seismic design.
Experimental study on the seismic performance of existing reinforced
Experimental tests on typical existing reinforced concrete bridge piers with hollow rectangular section were carried out. The specimens were designed and realized (scale 1:4) with material and reinforcement characteristics representative of the Italian bridge structures realized prior to 1980. ... Three shorter (more squat) and four taller ...
Investigation of the relationship between bending capacity …
The Y-F curves produce inflection points at 240 kN and 720 kN, and the slope of the curve rise decreases in steps, dividing the loading process into three loading stages. Concrete has the largest amount of strain variation in the second stage, and the mean values of concrete strain variation in the three loading stages are 278.4με, …
Comparative Study of Rapid Visual Screening Methods in …
The purpose of this study is to quickly assess the seismic vulnerability of existing reinforced concrete hospital buildings in Kabul City using rapid visual screening methods and compare the ...
Probabilistic methods for the estimation of potential seismic damage …
In this study, three alternative probabilistic approaches are presented in order to estimate potential seismic damage to existing reinforced concrete buildings in Turkey. In order to assess the damage estimations obtained from these three methods, the results are expressed in terms of mean damage ratios and compared with each other.
Effect of corrosion damage on seismic behaviour of existing reinforced
A typical three storied residential framed structure is designed as per the Indian Standards [15], [14], [16] that are commonly used in the Indian sub-continent. ... analysis to investigate the effect of corrosion in the sidewall on the damage to underground reinforced concrete (RC) culverts under an earthquake. ... requires immediate …
Estimating flexural damage in reinforced concrete columns
Three series of tests on reinforced concrete columns were carried out with regard to the damage to reinforced concrete structures due to the Tokachi-oki Earthquake, 1968.
Seismic Evaluation of Existing Reinforced Concrete …
Seismic Evaluation of Existing Reinforced Concrete Building. Dinesh J.Sabu 1, Dr. P.S. Pajgade 2. ABSTRACT: The recent earthquakes have exposed the vulnerability of the existing reinforced concrete buildings in India. The Bhuj earthq uake (2001) saw a great deal of damage to multi-storey buildings in the urban area of Gujarat.
Three-dimensional computer-aided finite element method …
Three-dimensional computer-aided finite element method retrofitting modeling and non-destructive testing techniques for the assessment of actual existing high-rise fire-damaged reinforced concrete ...
Machine learning for the prediction of evaluation of existing
In addition, the importance of mitigation in the reduction of earthquake risk is a good fact and it has been evidenced by the recent strong seismic events in Turkey. Therefore, seismic evaluation of existing building structures in reinforced concrete is vital to mitigate the adverse effects of seismic events.
A comprehensive review on fire damage assessment of …
Damage due to fire is one of the most destructive aspects that cause deterioration of reinforced concrete structures. Although concrete is a noncombustible …
A scaled test on the damage and vibration behavior of reinforced …
In the outer side of the NPP model, concrete damage area caused by steel clasp is not included in the concrete damage area caused by the aircraft model impact. From Fig. 14 (b), the dimensions of the damage of the inner side of the NPP model are 1850 mm and 800 mm in the horizontal and vertical directions, respectively. After the …
Investigation of Reinforced Concrete Structures for Repair …
Visual Signs and Type of Repairs for Reinforced Concrete Structures. When the structure is distressed or damaged the normal visual signs are: cracks different patterns and …
Reinforced concrete long-term deterioration prediction for …
Each different damage index is calculated as per equation (1), considering only those damages indicated in Table 1.. 3.2. Completeness index. As it has been stated in Section 2, the precision of the deterioration prediction of any RC bridge can be estimated by calculating the Pearson correlation coefficient (R) of the linear expression defined by …
Damage identification of reinforced concrete slabs using …
The present study critically examines three reinforced concrete (RC) slabs, each having an area of 1.5 m x 1.0 m with a thickness of 75 mm. These slabs were …
Dynamic damage and fracture mechanism of curved ripper …
Shield tunnels inevitably cross existing structures like reinforced concrete pile foundations and concrete walls due to the spatial interlocking of underground structures in the construction process. The objective of minimizing cutter damage during the cutting of reinforced concrete pile foundations is widely pursued in engineering.
Physical vulnerability of reinforced concrete buildings under …
Debris avalanches caused by landslides often lead to building damage, and insufficient research has been conducted on the vulnerability of buildings, especially …
Fatigue Safety Evaluation of Existing Reinforced Concrete …
Textile reinforced concrete (TRC), which is a composite of fabrics of endless fibres and concrete, offers the opportunity to build very thin load carrying layers, that can be adopted to the ...
Load Testing Techniques for the Strength Evaluation of Existing …
Evaluating the condition of existing reinforced concrete structures is generally undertaken if the integrity of a structure is in question or if there is concern regarding the structure meeting ...
Seismic damage assessment of reinforced concrete bridge …
An evaluation method for the damage index of reinforced concrete bridge columns is proposed, using a nonlinear finite element analysis program (RCAHEST, Reinforced Concrete Analysis in Higher Evaluation System Technology), developed by the authors [4], [5], [6]. The low cycle fatigue model of concrete and that of reinforcing bars …
The Key Role of Floors for the Sustainability of Retrofit …
In recent decades, the seismic performance of existing reinforced concrete (RC) buildings has played a key role. Nevertheless, the performance and reliability verification of important structural elements such as floors has often been neglected. Floors are primary structural elements that can affect the life cycle life of a building. However, …
Experimental and theoretical investigations of the existing reinforced
The experimental and theoretical investigations of the existing reinforced concrete frame (RCF) retrofitted with a novel external retrofitting sub-structure, self-centering precast bolt-connected steel-plate reinforced concrete buckling-restrained brace frame (SC-PBSPC BRBF), are presented in this paper.