Ultimate flexural and shear capacity of concrete beams with corroded reinforcement

Bhargava, Kapilesh,Ghosh, A.K.,Mori, Yasuhiro,Ramanujam, S. Techno-Press 2007 Structural Engineering and Mechanics, An Int'l Jou Vol.27 No.3

Assessment of structural behaviour of corrosion affected structures is an important issue, which would help in making certain decisions pertaining to the inspection, repair, strengthening, replacement and demolition of such structures. The paper presents formulations to predict the loss of weight and the loss of cross-sectional area of the reinforcing bar undergoing corrosion based on the earlier study carried out by the present authors (Bhargava et al. 2006). These formulations have further been used to analytically evaluate the ultimate bending moment and ultimate shear force capacity of the corroded concrete beams. Results of the present study indicate that, a considerably good agreement has been observed between the experimental and the analytically predicted values for the weight loss and reduction in radius of the corroded reinforcing bars. A considerably good agreement has also been observed between the experimental and the analytically predicted values of ultimate bending moment and ultimate shear force capacity for the corroded concrete beams.

Some Finite Integrals Involving Srivastava's Polynomials and the Aleph Function

Bhargava, Alok,Srivastava, Amber,Mukherjee, Rohit Department of Mathematics 2016 Kyungpook mathematical journal Vol.56 No.2

In this paper, we establish certain integrals involving Srivastava's Polynomials [5] and Aleph Function ([8], [10]). On account of general nature of the functions and polynomials involved in the integrals, our results provide interesting unifications and generalizations of a large number of new and known results, which may find useful applications in the field of science and engineering. To illustrate, we have recorded some special cases of our main results which are also sufficiently general and unified in nature and are of interest in themselves.

A Randomized Control Trial of Left Hepatic Arterial Anastomosis with Graft Right Hepatic Artery Versus Anastomosis with Right Hepatic Artery and Its Impact on Biliary Complications

( Bhargava Ram Chikkala ),( Subash Gupta ) 대한간학회 2020 춘·추계 학술대회 (KASL) Vol.2020 No.1

Aims: It has been pointed out that LHA may not be suitable in all cases. This randomized control trial was conducted to assess whether anastomosis with LHA could be carried out in all the assigned cases and whether the outcome was comparable to anastomosis with RHA of the recipient. Methods: Inclusion criteria:·Living related right lobe adult to adult ABO compatible liver transplantation·Patients planned for duct to duct anastomosis·Single artery in donor graft for anastomosis on preoperative imaging Exclusion criteria:·Retransplantation ·Patients with sclerosing cholangitis or far apart ducts requiring two biliary anastomoses or bilioenteric anastomosis as suggested by preoperative imaging·ABO incompatible·Pediatric liver transplant·Multiple arteries Results: The arterial lumen of the recipient and donor arteries, size mismatch was significantly more in the RHA group. (15% Vs 72%, p-value - 0.03). the early morbidity and mortality was similar in both the groups. Late strictures among survivors were noted more commonly in the RHA group (29.7% vs. 22.7%). Bile leak, mortality, and incidence of late-onset biliary strictures were less common in the LHA group, though the difference was not statistically significant. Conclusions: Anastomosis of the graft artery in a right lobe graft with recipient LHA is feasible in the majority of the cases. The use of LHA was associated with fewer biliary complications in the long term as compared to RHA.

Analytical model of corrosion-induced cracking of concrete considering the stiffness of reinforcement

Bhargava, Kapilesh,Ghosh, A.K.,Mori, Yasuhiro,Ramanujam, S. Techno-Press 2003 Structural Engineering and Mechanics, An Int'l Jou Vol.16 No.6

The structural deterioration of concrete structures due to reinforcement corrosion is a major worldwide problem. Service life of the age-degraded concrete structures is governed by the protective action provided by the cover concrete against the susceptibility of the reinforcement to the corrosive environment. The corrosion of steel would result in the various corrosion products, which depending on the level of the oxidation may have much greater volume than the original iron that gets consumed by the process of corrosion. This volume expansion would be responsible for exerting the expansive radial pressure at the steel-concrete interface resulting in the development of hoop tensile stresses in the surrounding cover concrete. Once the maximum hoop tensile stress exceeds the tensile strength of the concrete, cracking of cover concrete would take place. The cracking begins at the steel-concrete interface and propagates outwards and eventually resulting in the through cracking of the cover concrete. The cover cracking would indicate the loss of the service life for the corrosion-affected structures. In the present paper, analytical models have been developed considering the residual strength of the cracked concrete and the stiffness provided by the combination of the reinforcement and expansive corrosion products. The problem is modeled as a boundary value problem and the governing equations are expressed in terms of the radial displacement. The analytical solutions are presented considering a simple 2-zone model for the cover concrete viz. cracked or uncracked. A sensitivity analysis has also been carried out to show the influence of the various parameters of the proposed models. The time to cover cracking is found to be function of initial material properties of the cover concrete and reinforcement plus corrosion products combine, type of rust products, rate of corrosion and the residual strength of the cover concrete. The calculated cracking times are correlated against the published experimental and analytical reference data.

Seismic response and failure modes for a water storage structure - A case study

Bhargava, Kapilesh,Ghosh, A.K.,Ramanujam, S. Techno-Press 2005 Structural Engineering and Mechanics, An Int'l Jou Vol.20 No.1

The present paper deals with the seismic response analysis and the evaluation of most likely failure modes for a water storage structure. For the stress analysis, a 3-D mathematical model has been adopted to represent the structure appropriately. The structure has been analyzed for both static and seismic loads. Seismic analysis has been carried out considering the hydrodynamic effects of the contained water. Based on the stress analyses results, the most likely failure modes viz. tensile cracking and compressive crushing of concrete for the various structural elements; caused by the seismic event have been investigated. Further an attempt has also been made to quantify the initial leakage rate and average emptying time for the structure during seismic event after evaluating the various crack parameters viz. crack-width and crack-spacing at the locations of interest. The results are presented with reference to peak ground acceleration (PGA) of the seismic event. It has been observed that, an increase in PGA would result in significant increase in stresses and crack width in the various structural members. Significant increase in initial leakage rate and decrease in average emptying time for the structure has also been observed with the increase in PGA.

Melittopalynological Studies of Apis Honey Samples from Chickmagalur District, Karnataka, India

Bhargava H. R,M. S. Reddy 한국양봉학회 2012 韓國養蜂學會誌 Vol.27 No.1

A recurrence relation related to the product and successors of a known four-variable elementary identity

S. Bhargava 장전수학회 2014 Proceedings of the Jangjeon mathematical society Vol.17 No.2

A recurrence relation related to the productand successors of a known four-variable elementary identity

A swelling of the maxilla: a case report and differential diagnosis

Puneet Bhargava,Saba Khan,Rohit Sharma,Khalid Agwani,Sahil Gupta 대한구강악안면외과학회 2014 대한구강악안면외과학회지 Vol.40 No.6

Ossifying fibromas are benign fibro-osseous tumors of mesenchymal origin. Although ossifying fibromas have principally been found in the jaw, they have also been reported in the frontal, ethmoid, sphenoid, and temporal bones, as well as the orbit and anterior cranial fossa. Ossifying fibromas affect- ing the jaw exhibit variable behaviors ranging from slow growth to occasionally aggressive local destruction. In the present article, we discuss a differ- ential diagnosis considered for maxillary swellings and report a rare case of ossifying fibroma occurring in the maxilla.

802.11 practical improvements using low power technology

Vishal Bhargava,N.S. Raghava 한국인터넷정보학회 2022 KSII Transactions on Internet and Information Syst Vol.16 No.5

The reliability and performance of WiFi need optimization because of the rising number of WiFi users day by day. A highlighted point is saving power while transmitting and receiving packets using WiFi devices. Wake-on–Wlan (WoW) is also implemented to improve energy consumption, but it also needs betterment. This paper will introduce universal ideas to transmit and receive packets using low-power technology like Bluetooth or BLE (Bluetooth low energy). While looking for power-saving ways in this research, WiFi connection and maintenance also take care using lesser power-consuming technology. Identifying different use-cases where low power technology can help save energy and maintain 802.11 connection is part of the research. In addition, the proposed method discuss energy saving with unicast and broadcast/multicast data. Calculation of power-saving and comparison with standalone WiFi usage clearly shows the effectiveness of the proposed method.

Seismic response and failure modes for a water storage structure − A case study

Kapilesh Bhargava,A. K. Ghosh,S. Ramanujam 국제구조공학회 2005 Structural Engineering and Mechanics, An Int'l Jou Vol.20 No.1

The present paper deals with the seismic response analysis and the evaluation of most likely failure modes for a water storage structure. For the stress analysis, a 3-D mathematical model has been adopted to represent the structure appropriately. The structure has been analyzed for both static and seismic loads. Seismic analysis has been carried out considering the hydrodynamic effects of the contained water. Based on the stress analyses results, the most likely failure modes viz. tensile cracking and compressive crushing of concrete for the various structural elements; caused by the seismic event have been investigated. Further an attempt has also been made to quantify the initial leakage rate and average emptying time for the structure during seismic event after evaluating the various crack parameters viz. crack-width and crack-spacing at the locations of interest. The results are presented with reference to peak ground acceleration (PGA) of the seismic event. It has been observed that, an increase in PGA would result in significant increase in stresses and crack width in the various structural members. Significant increase in initial leakage rate and decrease in average emptying time for the structure has also been observed with the increase in PGA.