Assessment of Uncertainty of Error in Design Flood Estimates Using 2-Parameter Log Normal Distribution
The Impact of Plan Irregularity on Multistory Building Response: A Pushover Analysis
Static and Vibration Analysis of Reinforced Cement Concrete Cellular Beams: A Three-Dimensional Study
Pumice as a Coarse Aggregate Substitute for Lightweight Concrete: Strength and Density Assessment
Masonry Infill in Structural Analysis: Effects on Seismic Performance
Study on Strength Properties of Lightweight Expanded Clay Aggregate Concrete
A Step By Step Illustrative Procedure to Perform Isogeometric Analysis and Find the Nodal Displacements for a Two Dimensional Plate Structure
Lateral - Torsional Buckling of Various Steel Trusses
A Step by Step Procedure to Perform Isogeometric Analysis of Beam and Bar Problems in Civil Engineering Including Sizing Optimisation of a Beam
Comparative Study on Methodology of Neo-Deterministic Seismic Hazard Analysis Over DSHA and PSHA
Investigation on the Properties of Non Conventional Bricks
Analysis on Strength and Fly Ash Effect of Roller Compacted Concrete Pavement using M-Sand
Investigation on Pozzolanic Effect of Mineral Admixtures in Roller Compacted Concrete Pavement
Effect of Symmetrical Floor Plan Shapes with Re-Entrant Corners on Seismic Behavior of RC Buildings
Effect of Relative Stiffness of Beam and Column on the Shear Lag Phenomenon in Tubular Buildings
Polyethylene Terephthalate is a synthetic material referred as PET. Strapping means process of bundling with the help of various straps and strapping tools. PET strap is a strong material used for packaging of various goods. PET strap has high resistivity against temperature and high tensile strength. It is commonly used in all industries for packaging and bundling. In this experimental work, an attempt has been made to use of PET strap in concrete in the form of fibres to study the behavior of compression members for the addition of different aspect ratio of PET strap fibres like 0, 33, 55, 77, 99, and 122. Totally 18 concrete cubes of size 150 x 150 x 150 mm were casted and cured for 28 days for the nominal mix proportion of 1: 1: 2 with a w/c ratio of 0.45. Series of tests were conducted, such as ultrasonic pulse velocity, rebound hammer, and compression test at laboratory. Based on the obtained and evaluated test results, it was concluded that aspect ratio of '55' is the good aspect ratio of PET strap fibres and it can be added upto 2% by weight of cement for the production of PET strap fibre reinforced concrete.
Transmission towers have been playing an important role in the power sector. This study is focused on optimizing the steel transmission towers using firefly algorithm. Metaheurisitcs have been widely in use during the recent past. The design of cross sectional areas of the members is modeled as a continuous variable to determine the optimal values. A new approach is designed to perform optimization process. This study does not include using IS (Indian Standard) steel sections from the steel tables. The planar linear static analysis of the steel tower is conducted first and the linear buckling analysis is conducted using Midas FEA (Finite Element Analysis). The maximum stresses and displacements in the tower are compared against the allowable stresses and displacements. The positive buckling load factors were determined and the mode shapes were plotted. IS 800 code checks were performed and the results presented towards the end.
The effect of flange taper ratio on bucking load capacity of web tapered steel cantilever beams and beam-columns is investigated by performing finite element analysis. Beams and beam-columns of span 4 m, 6 m, and 8 m are considered. For all the cases, the web taper ratio is considered as 0.5. The flange taper ratios considered are 0.4, 0.5, and 0.6. Linear elastic buckling loads are obtained by performing finite element analysis with the help of ANSYS – commercial software. The beam-columns are subjected to eccentric axial loading and beams are subjected to lateral point load at free ends. By observing the obtained results, it is evident that with the increase in flange taper ratio, the buckling load is increased. The effect of flange taper ratio on buckling load is more dominant as span of the members increases.
This paper presents the comparison of the various methods of analysis of retaining walls under seismic loads. The furthermost usually used methods for the seismic design of retaining walls were considered. A concrete retaining wall was considered and analyzed for the static as well as the seismic loading conditions. It is formed that internal friction angle and soil-wall friction angle affect the stability on the basis of parametric studies. The authors have calculated the factor of safety against sliding and overturning. Two Statics and four dynamic methods for zone four (IV) have been studied and compared for their factor of safety. Amongst the six methods being studied, Choudhury and Nimbalkar [3] came out for maximum factor of safety. Whereas Seed and Whitman [12] with minimum factor of safety. Hence the method used by Choudhury and Nimbalkar is recommended for earthquake prone areas on the basis of this study. It is also found that Seed and Whitman (1970) are more conservative as compared to other methods.
India is a developing country and in the construction industry, the need of high rise as well as lighter structures increase continuously. In addition to this, the structures should have also more flexibility and high damping value. The problem of failure increases as height of the structure increases and also serviceability is a major concern. Tuned Liquid Damper (TLD) is applied to reduce the structural vibrations effectively. The main objective of this paper is to show the effectiveness of assumed analytical steel model of given dimension. The building structural vibrations can be minimized using TLD. Two analytical models proposed by Sun and Yu are considered. In Sun’s model, the dynamic equations of motion is solved, whereas in the latter one, the properties of liquid damper are presented by equivalent mass, stiffness and damping ratio modeling the TLD as an equivalent Tuned Mass Damper essentially. An analytical model with the nonlinearity and wave breaking in mind is considered to investigate the response of the frame model, fitted with a TLD. The effectiveness of the TLD was calculated in terms of amplitude of displacements, velocity, and acceleration at top storey of the structure. The model shows the percentage reduction in displacement, velocity and acceleration by 52.77%, 21.17%, and 21.49%, respectively when subjected to a sinusoidal force of magnitude 3 N and frequency ratio (β)=1.
Construction activities worldwide are increasing at a tremendous rate and the costs are also increasing in a day-by-day manner. Pre engineered buildings put forwards an excellent solution to all the complicated problems associated with the conventional steel and other type of buildings. At present in a global manner, pre-engineered building or PEB system is becoming an eminent segment in the construction industry. Pre engineered building is less expensive than conventional construction and can be designed according to the specific requirements. The design and construction of pre engineered building is cost effective and less time consuming. The pre engineered buildings can be disassembled and transported to another location for re-erection if necessitates. The maintenance costs of pre engineered building are low compared to the usual method of construction. These buildings have long life expectancies and the impact of steel on environment is far less than using a non-renewable resource and they keep the impact to the environment minimal. As most of the materials used in the construction of pre engineered buildings are recyclable; it conserves the energy and has minimum impact on ecology and environment. So pre engineered building is the only remedy to the construction industry in the creation of an industrial, commercial, recreational or other type of building units within the stipulated time frame with limited usage of material, energy, manpower and without making much harm to the ecology and environment. Thus pre engineered buildings are the prime contributors for the sustainable development of the nation.
