scholarly journals Design AID for Continuous Beams

1970 ◽  
Vol 3 ◽  
Author(s):  
SN Khuda ◽  
AMMT Anwar
Keyword(s):  
Structural Engineering ◽  
Bending Moment ◽  
Engineering Practice ◽  
Uniform Loading ◽  
Analysis And Design ◽  
Moment Coefficient ◽  
Continuous Beams ◽  
Exact Moment ◽  
The Moment ◽  
Selection Of

Analysis and design of beam is still an important part in Structural Engineering practice. As a major component in structure, it demands due attention and accuracy. At the same time engineers need to achieve economy in time and cost in the design of beams. To assist designers moment coefficients are developed for continuous beams in this work. Existing ACI moment coefficients are applicable only under certain conditions and have some limitations. This study is an attempt to develop moment coefficients for beams which will be applicable beyond ACI limitations. Comparison of developed coefficients with corresponding ACI coefficients has been done and a satisfactory agreement is found. However, ACI coefficients are found to be conservative. Additionally design tables are developed for selection of RC beam section and reinforcement when design bending moment and shear are available. SAP2000 has been used for analysis of beams during the study. Models are used to generate exact moment coefficients for beams of different span ratios and spans under uniform loading. The moment coefficients and design tables generated in this work will be useful for practicing engineers for quick design. KEY WORDS: Moment Coefficient; Shear; Continuous Beam; Uniform Loading. DOI: http://dx.doi.org/10.3329/mist.v3i0.8051

Building Structural Systems in Christchurch's Post-Earthquake Reconstruction

2019 ◽  
Vol 35 (4) ◽  
pp. 1953-1978 ◽  
Author(s):  
Michel Bruneau ◽  
Gregory MacRae
Keyword(s):  
Structural Engineering ◽  
Central Business District ◽  
City Council ◽  
Engineering Practice ◽  
Structural Systems ◽  
Key Points ◽  
New City ◽  
Business District ◽  
Earthquake Reconstruction ◽  
Selection Of

After the 2010–2011 Canterbury earthquakes, much of the Christchurch Central Business District was demolished, and a new city is in the process of emerging in its place. A series of interviews conducted with key professionals involved with the reconstruction, together with data collected from various sources (including Christchurch's City Council database), has made it possible to (1) quantify variations in the selection of a structural system as a function of various parameters and (2) identify some of the drivers that have influenced decisions about the selection of structural material and specific structural systems used. Key points on factors that may affect post-earthquake structural engineering practice are drawn from the data collected. As such, the Christchurch rebuilding experience provides insights into some of the mechanisms that can dictate structural engineering decisions during the post-earthquake reconstruction of a modern city.

scholarly journals IV. On the practical solution of the most general problems in continuous beams

1879 ◽  
Vol 29 (196-199) ◽  
pp. 493-505
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
General Problem ◽  
Bending Moment ◽  
Moment Of Inertia ◽  
Shearing Stress ◽  
Practical Solution ◽  
Continuous Beams ◽  
The Moment

1. It is not necessary to enter into the question of the advisability of employing continuous girders in bridges with spans of less than 200 feet, but it is generally conceded that the increased economy due to the employment of continuous girders in longer spans more than counterbalances the well-known practical objections to continuity. Hence the practical solution of the general problem—given the conditions at the ends of a continuous girder, the spans, the moment of inertia of all cross sections, and the loading, to find the bending moment and shearing stress in every cross-section, is not unworthy of our attention.

scholarly journals Significant Guidance to Employ the Software to Analyze and Design the Reinforced Concrete Structures: State-Of-The-Art

2019 ◽  
Vol 8 (9) ◽  
pp. 1160-1169
Keyword(s):  
Reinforced Concrete ◽  
Structural Engineering ◽  
Final Decision ◽  
Design Codes ◽  
Construction Time ◽  
Rc Structures ◽  
Analysis And Design ◽  
Technical Specifications ◽  
Structural Engineers ◽  
Selection Of

Prevailing analysis and design of reinforced concrete (RC) structures is a critical stage in the construction industry to deliver the projects within the estimated construction time period and within the budget. The selection of suitable structural engineering software to perform the analysis and design tasks is not an easy matter of fact, especially with the existence of many specialized software in this domain such as Robot Structural Analysis, MIDAS Gen, SAP 2000, STAAD.PRO, Tekla Structural designer, S-Frame and many others. So a strong comparison between the existing software must be made before taking the final decision of selecting any software. The main goal of this paper is to present overall guidance for selection of the suitable software among the most common software used for the analysis and design of RC structures along with the supported design codes, analysis types and design modules incorporated in each software. The technical specifications, characteristics, application domains, incorporated structural design codes, limitation, technical popularity and capabilities of the existing most common used software were studied and compared. Based on the performed study, eleven software were selected and presented as a useful guideline for the structural engineers in the analysis and design of RC structures. In this paper, a complete guideline including the required technical information for structural engineers to choose the suitable software for analyzing and designing of the RC structures is presented.

Analysis and Design of Beams Reinforced with Steel Fiber and Composite Plates

2020 ◽  
Vol 38 (2A) ◽  
pp. 113-125
Author(s):  
Mereen H. Fahmi Rasheed ◽  
Ayad Z. Saber Agha
Keyword(s):  
Bending Moment ◽  
Composite Plates ◽  
Steel Fibers ◽  
Reinforced Concrete Beams ◽  
Effective Technique ◽  
Shear Strengthening ◽  
Moment Capacity ◽  
Analysis And Design ◽  
Tension And Compression ◽  
The Moment

The addition of epoxy bending plate to the tension and compression faces or web is an effective technique for flexural or shear strengthening of reinforced concrete beams, also using of steel fibers with concrete improves the structural behavior and increases the moment capacity and shear resistance of the beams. General equations are derived for predicting the bending moment capacity, maximum and balancing reinforcement ratio the equivalent depth of the compression zone for singly and doubly reinforced rectangular sections and T-beams. The results indicate that bending moment capacity increased in beams with steel fibers and composite plates, while the maximum balancing reinforcement ratios are decreased.

scholarly journals Structural Performance of Pre Engineered Building: A Comparative Study

2021 ◽  
Vol 1197 (1) ◽  
pp. 012086
Author(s):  
V Vishnu Sai ◽  
P Poluraju ◽  
B Venkat Rao
Keyword(s):  
Shear Force ◽  
Structural Engineering ◽  
Fast Rate ◽  
Bending Moment ◽  
Structural Performance ◽  
Technological Advancement ◽  
Geometrical Properties ◽  
Analysis And Design ◽  
Custom Design

Abstract Technological advancements have greatly aided in improving quality of life through variety of new products and services. Pre Engineered Building (PEB) is among such technological advancement in the structural engineering. PEB concept provides optimum design, good aesthetic view, fast rate of construction and reduction in erection time. PEB satisfies a broad range of custom design needs and applications. This methodology is adaptable not only because of its high quality pre-designing and prefabrication, but also of its flexibility. In the current study, the comparison has been made on the structural performance of multiple bay system with different wind zones [Locations: Vijayawada and Hyderabad]. Analysis and design have been carried out using STAAD.Pro software. The structural performance of pre-engineered building has been assessed through the shear force (SF) and bending moment (BM) magnitudes. Based on the output of SF and BM of pre-engineered components through Staad. Pro analysis, the geometrical properties of pre-engineered sections have been decided. Results concludes structure weight located in Vijayawada is 11.04% higher than that of the structure in Hyderabad.

A New Generation of Tools for the Design of Tall Buildings Subjected to Wind Loads

2008 ◽  
Author(s):  
Emil Simiu ◽  
Rene D. Gabbai
Keyword(s):  
Structural Engineering ◽  
Tall Buildings ◽  
Building Envelope ◽  
Force Balance ◽  
Wind Loads ◽  
Individual Member ◽  
Engineering Practice ◽  
Wind Effects ◽  
Uncertainty Estimates ◽  
Internal Forces

Current approaches to the estimation of wind-induced wind effects on tall buildings are based largely on 1970s and 1980s technology, and were shown to result in some cases in errors of up to 40%. Improvements are needed in: (i) the description of direction-dependent aerodynamics; (ii) the description of the direction-dependent extreme wind climate; (iii) the estimation of inertial wind effects induced by fluctuating aerodynamic forces acting on the entire building envelope; (iv) the estimation of uncertainties inherent in the wind effects; and (v) the use of applied wind forces, calculated inertial forces, and uncertainty estimates, to obtain via influence coefficients accurate and risk-consistent estimates of wind-induced internal forces or demand-to-capacity ratios for any individual structural member. Methods used in current wind engineering practice are especially deficient when the distribution of the wind loads over the building surface and their effects at levels other than the building base are not known, as is the case when measurements are obtained by the High-Frequency Force Balance method, particularly in the presence of aerodynamic interference effects due to neighboring buildings. The paper describes a procedure that makes it possible to estimate wind-induced internal forces and demand-to-capacity ratios in any individual member by: developing aerodynamic and wind climatological data sets, as well as aerodynamic/climatological directional interaction models; significantly improving the quality of the design via rigorous structural engineering methods made possible by modern computational resources; and properly accounting for knowledge uncertainties. The paper covers estimates of wind effects required for allowable stress design, wherein knowledge uncertainties pertaining to the parameters that determine the wind loading are not considered, as well as estimates required for strength design, in which these uncertainties need to be accounted for explicitly.

Experimental study of moment carrying behavior of typical Tibetan timber beam-column joints

2021 ◽  
pp. 136943322110015
Author(s):  
Ting Guo ◽  
Na Yang ◽  
Huichun Yan ◽  
Fan Bai
Keyword(s):  
Bending Moment ◽  
Structural Performance ◽  
Test Results ◽  
Timber Beam ◽  
Rotational Stiffness ◽  
Trilinear Model ◽  
Column Joint ◽  
Loading Tests ◽  
The Moment ◽  
Relationship Of

This study aimed to investigate the moment carrying behavior of typical Tibetan timber beam-column joints under monotonic vertical static load and also evaluate the influence of length ratio of Gongmu to beam (LRGB) and dowels layout on the structural performance of the joint. Six full-scale specimens were fabricated with same construction but different Gongmu length and dowels position. The moment carrying performance of beam-column joints in terms of failure mode, moment resistance, and rotational stiffness of joints were obtained via monotonic loading tests. Test results indicated that all joints are characterized by compressive failure perpendicular to grain of Ludou. Additionally, it was found that greater LRGB leads to greater initial rotational stiffness and maximum moment of the joint by an increase of restraint length for beam end; however, offsetting dowels toward column resulted smaller stiffness and ultimate bending moment of joints, particularly, offsetting Beam-Gongmu dowels toward column changed the moment-rotation curve pattern of the beam-column joint, accompanied by a hardening stiffness at last phase. Furthermore, a simplified trilinear model was proposed to represent the moment-rotation relationship of the typical Tibetan timber beam-column joint.

Bending and Twisting of Pipes With Strain Hardening

1984 ◽  
Vol 106 (2) ◽  
pp. 188-195 ◽  
Author(s):  
J. H. Lau ◽  
T. T. Lau
Keyword(s):  
Effective Strain ◽  
Closed Form Solution ◽  
Bending Moment ◽  
Small Deformation ◽  
Form Solution ◽  
Simultaneous Action ◽  
Deformation Analysis ◽  
Engineering Practice ◽  
Strain Diagram ◽  
Interaction Curves

A closed-form solution is presented for the small deformation analysis of a straight thin-walled circular cylinder subjected to the simultaneous action of bending and twisting moments. Dimensionless interaction curves and charts which relate the variables, bending moment, curvature, maximum effective strain, twisting moment, and shear strain are also provided for engineering practice convenience. The average stress-strain diagram of the cylinder is described by two straight lines. The result presented herein is not only a good approximation of a wide class of piping materials, but also provides a standard tool for estimating the accuracy of different direct schemes such as numerical integration, finite-difference, and finite-element methods.

DIFFERENTIAL EQUATIONS FOR TRAIN STARTING WITH ELASTIC CONNECTIONS

2021 ◽  
Vol 2 ◽  
pp. 18-26
Author(s):  
I.P. POPOV
Keyword(s):  
Mathematical Model ◽  
Differential Equations ◽  
Friction Force ◽  
Static Friction ◽  
Longitudinal Vibrations ◽  
Maximum Tension ◽  
Inert Mass ◽  
The Moment ◽  
Elastic Couplings ◽  
Selection Of

The starting mode for the train is the most difficult. An effective method of pulling is the selection of coupling clearances. In this case, the cars are set in motion sequentially and the inert mass, as well as the static friction force immediately at the moment of starting, are minimal. This method has two significant drawbacks - a small fixed value of the gaps in the couplings and the shock nature of the impulse transfer. These disadvantages can be avoided by using elastically deformable couplings. The aim of this work is to construct a mathematical model of "easy" starting of a train with elastic couplings. The softening of the train start-off mode is essentially due to the replacement of the simultaneous start-off of the sections with alternate ones. To exclude longitudinal vibrations of the composition, after reaching the maximum tension of the coupling, the possibility of its harmonic compression should be mechanically blocked.

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