scholarly journals Segmental Analysis and Design of Superstructure for Box Girder Balanced Cantilever Bridge by IRC Specification Using Midas Civil

2020 ◽  
pp. 107-114
Author(s):  
L. S. Kalaiselvan
Keyword(s):  
Shear Force ◽  
Bending Moment ◽  
Ground Level ◽  
The Other ◽  
Time Dependent ◽  
Bridge Structure ◽  
Box Girder ◽  
Segmental Analysis ◽  
Analysis And Design ◽  
Creep And Shrinkage

A bridge is a combination of substructure and superstructure that is built over a river, road, or railway to allow people and vehicles to cross from one side to the other. This paper describes about the analysis and design of box girder balanced cantilever bridge using MIDAS CIVIL by IRC loadings, characterized by central span of 130m with two symmetrical sides of 85m.Bridge deck is supported by two piers of 40m height from ground level. The bridge structure has been modelled using MIDAS CIVIL and analysis has been performed to get various output such as bending moment, shear force and time dependent properties such as creep and shrinkage at various points of the bridge. The PSC (prestressed) design of superstructure is performed as per IRC standards to get the output parameters such as principle stresses at construction stage, principle stress for prestressing tendon. While by using balanced cantilever bridge less form work has been required for this type of bridge.

scholarly journals Analysis of Pre-Stressed Box Girder Bridge under Different Standard Codes: A Comparative Study

2021 ◽  
Vol 1197 (1) ◽  
pp. 012068
Author(s):  
Shubham S. Hande ◽  
Sharda P. Siddh ◽  
Prashant D. Hiwase
Keyword(s):  
Shear Force ◽  
Bending Moment ◽  
Concrete Bridge ◽  
Box Girder ◽  
Analysis And Design ◽  
Bridge Span ◽  
Vehicle Load ◽  
Box Girder Bridge ◽  
Girder Bridge ◽  
Aashto Lrfd

Abstract Pre-stressed concrete bridge analysis is completely dependent on the standards and design criteria. Herein, the current study compares like a pre-stressed concrete bridge under the effect of two different loading standards and specifications. The two different loading standards considered herein are IRC 6: 2000 and AASHTO-LRFD standards. Further, the pre-stressed box girder bridge is modelled and analysis in MIDAS CIVIL. On carrying out analysis, the primary structural analysis parameters which are important for the design of structure, are studied. These parameters are shear force, bending moment and torsion in the bridge elements along its length. It became observed that AASHTO standards are uneconomical than IRC standards, due to consideration of heavy weight vehicle load moving on the bridge span. Thus, it might be said that pre-stressed box girder bridge analysis and design should be carried out effectively and optimistically using IRC standards and specifications.

scholarly journals Effect of Time Dependent Variables on Different Types of PSC Box Girder Bridges.

2019 ◽  
Vol 11 (02) ◽  
pp. 123-128
Author(s):  
Norine George ◽  
Kiran Umachagi ◽  
Sunil Kumar Tengli
Keyword(s):  
Cross Section ◽  
Prestressed Concrete ◽  
Cell Types ◽  
Time Dependent ◽  
Box Girder ◽  
Temperature Creep ◽  
Dependent Variables ◽  
Concrete Box Girder ◽  
Girder Bridge ◽  
Creep And Shrinkage

Time dependent variables such as temperature gradient, effective temperature, creep, and shrinkage lead to long term deflection in prestressed concrete girders. This in turn effects the serviceability and sustainability of the bridge in the long run. Therefore, research and analysis is of paramount importance before deciding the type of girder to be used. A parametric study was carried out in order to determine the most desirable and efficient type of box girder to be used for a prestressed concrete bridge having a continuous span. Three prestressed concrete box girder bridge models of single, multi-cell rectangular and multi-cell trapezoidal cross section, having similar span, width and depth were taken into consideration. The finite element models were analysed using MIDAS Civil. The behaviour of the box girder cell types under various time dependent properties such as temperature, creep and shrinkage are presented in this paper. The results show that the prestressed concrete box girder bridge of multi-cell rectangular cross section exhibits greater forces and moments due to time dependent variables in comparison to the other two box girder cell types.

scholarly journals Investigation of Load Distribution Factors for Simply-Supported Composite Multiple Box Girder Bridges

2021 ◽  
Author(s):  
Siham Kadhim Jawad
Keyword(s):  
Finite Element ◽  
Parametric Study ◽  
Load Distribution ◽  
Shear Force ◽  
Bending Moment ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Simply Supported ◽  
Girder Bridges ◽  
Load Distribution Factors

Composite box-girder bridges are recently used in modern highway urban system because of their profitable and structural aptitude advantages. North Americans Codes of Practice specify empirical equations for girder moment and shear forces in such bridges in the form of live load distribution factors. These factors were proven to be conservative in some cases and underestimate the response in other cases. Therefore, an extensive parametric study, using the finite-element modeling, was conducted to examine the key parameters that influence the load distribution factors of such bridges. A total of 276 prototype bridges were analyzed to evaluate girder bending moment, shear force and deflection distribution factors for simply-supported composite multiple box-girder bridges when subjected to CHBDC truck loading. Design parameters considered in this study were bridges span length, numbers of design lanes, number of box girders and girder spacing. Based on the data generated from parametric study, sets of simple empirical expressions were developed for bending moment; shear force and deflection distribution factors for such bridges. A correlation between the finite-element results with CHBDC and AASHTO-LRFD empirical expressions showed the former are more reliable in structural design of composite box-girder bridges.

scholarly journals COMPARATIVE STUDY OF BS 8110 AND EUROCODE 2 IN STRUCTURAL DESIGN AND ANALYSIS

2017 ◽  
Vol 36 (3) ◽  
pp. 758-766
Author(s):  
CU Nwoji ◽  
AI Ugwu
Keyword(s):  
Structural Design ◽  
Shear Force ◽  
Bending Moment ◽  
Ease Of Use ◽  
Technological Advancement ◽  
Structural Elements ◽  
Analysis And Design ◽  
Eurocode 2 ◽  
Concrete Building ◽  
Relative Gains

This work was undertaken to compare the use of BS 8110 and Eurocode 2 in the design of structures and focused on outlining the relative gains and/or shortcomings of Eurocode 2 and BS 8110 under certain criteria which are loading, analysis, ease of use and technological advancement. To accomplish this, the analysis and design of the main structural elements in reinforced concrete building was undertaken using the two codes. A modest medium rise building was loaded using the two code and analyzed. Analysis was done using CSI start tedds to obtain the shear force and bending moment envelopes. For the beam, it was found that Eurocode 2 gave higher internal supports moments. For the case of maximum span moments and shear force values, the Euroode 2 values lagged behind. Column load and moments values were generally lower for Euroode 2. In summary, the comparative benefits of using Euroode 2 are that it is logical and organized, less restrictive and more extensive than the BS 8110. The new Eurocodes are claimed to be the most technically advanced code in the world and therefore should be adopted by Nigerian engineers. http://dx.doi.org/10.4314/njt.v36i3.14

scholarly journals Impact of Revised Code Provisions of Seismic and Wind Loads on RCC Elevated Water Tanks

2019 ◽  
Vol 8 (11) ◽  
pp. 1216-1221
Keyword(s):  
Shear Force ◽  
Emergency Service ◽  
Bending Moment ◽  
Ground Level ◽  
Base Shear ◽  
Internal Parameters ◽  
Earthquake Design ◽  
Elevated Water ◽  
Water Tanks ◽  
Code Provisions

Reinforced concrete elevated water tanks have been reckoned as importance structure for post-earthquake and Post cyclonic emergency service consideration.Certain additional guidelines have been recommended in IS 1893 (Part-2) 2014 Earthquake code and IS 875 (Part-3) 2015Wind load code in cyclonic prone areas of Indian peninsula. Three different capacities of RCC Elevated water tanks have been examined the effects of revised code provisions with the STAAD Pro (v8i) software to assess the internal parameters such as axial force at the ground level, Bending moment, Base Shear force and finally the quantity of steel required. The effect of Zonal classifications is illustrated and finally it can be concluded that the Earthquake design criteria governs when compared to Cyclonic load consideration

scholarly journals Investigation of Load Distribution Factors for Simply-Supported Composite Multiple Box Girder Bridges

2021 ◽  
Author(s):  
Siham Kadhim Jawad
Keyword(s):  
Finite Element ◽  
Parametric Study ◽  
Load Distribution ◽  
Shear Force ◽  
Bending Moment ◽  
Box Girder Bridges ◽  
Box Girder ◽  
Simply Supported ◽  
Girder Bridges ◽  
Load Distribution Factors

Composite box-girder bridges are recently used in modern highway urban system because of their profitable and structural aptitude advantages. North Americans Codes of Practice specify empirical equations for girder moment and shear forces in such bridges in the form of live load distribution factors. These factors were proven to be conservative in some cases and underestimate the response in other cases. Therefore, an extensive parametric study, using the finite-element modeling, was conducted to examine the key parameters that influence the load distribution factors of such bridges. A total of 276 prototype bridges were analyzed to evaluate girder bending moment, shear force and deflection distribution factors for simply-supported composite multiple box-girder bridges when subjected to CHBDC truck loading. Design parameters considered in this study were bridges span length, numbers of design lanes, number of box girders and girder spacing. Based on the data generated from parametric study, sets of simple empirical expressions were developed for bending moment; shear force and deflection distribution factors for such bridges. A correlation between the finite-element results with CHBDC and AASHTO-LRFD empirical expressions showed the former are more reliable in structural design of composite box-girder bridges.

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.

REMAINING STRENGTH EVALUATION OF FERRY BRIDGE CORRODED LOCALLY

2018 ◽  
Vol 5 (2) ◽  
Author(s):  
Fumiya Takami ◽  
Katashi Fujii
Keyword(s):  
Finite Element Analysis ◽  
Shear Strength ◽  
Ultimate Strength ◽  
Shear Force ◽  
Bending Moment ◽  
Corrosion Damage ◽  
Nonlinear Finite Element ◽  
The Other ◽  
Element Analysis ◽  
Collapse Mode

This paper presents the results of a nonlinear finite element analysis to determine the remaining ultimate strength of a ferry bridge with local corrosion at the girder flange. The ultimate strength decreases with the corrosion thinning of the flange, when the corrosion damage locates at the center of the span. On the other hand, when the corrosion damage exists near the support, the ultimate strength did not decrease, which shows the repair of the flange thinning near the support is not so effective in strength rehabilitation of the bridge. The reason of these facts is; the collapse of the bridge is due to bending moment in the former case, but in the latter, it is due to not bending moment but shear force, therefore, flange thinning does not concern with the shear strength. Thus, rational maintenance will be possible after clarifying the collapse mode and the remaining strength of the bridge.

Application of shotcrete constitutive model to the time dependent behavior of TBM tunnel lining

2018 ◽  
Vol 7 (3) ◽  
pp. 1826
Author(s):  
Heyam H. Shaalan ◽  
Mohd Ashraf Mohamad Ismail ◽  
Romziah Azit
Keyword(s):  
Constitutive Model ◽  
Steel Fibre ◽  
Tunnel Lining ◽  
Time Dependent ◽  
Elastic Behaviour ◽  
Elastic Analysis ◽  
Time Dependent Behaviour ◽  
Shotcrete Lining ◽  
Creep And Shrinkage ◽  
Dependent Behaviour

Shotcrete is ordinary concrete applied to the surface under high pressure. It demonstrates a highly time-dependent behaviour after few hours of application. Traditional approaches assume a simple linear elastic behaviour using a hypothetical young modulus to investigate the time-dependency and creep effects. In this paper, a new constitutive model of shotcrete is applied to evaluate the time-dependent behaviour of a TBM tunnel lining and investigate the parameters that can influence this behaviour. The Shotcrete model is based on the framework of Elasto-plasticity and designed to model shotcrete linings more realistically. The basic data of Pahang-Selangor Raw Water Transfer Project is used for the analysis study. An attempt is made to investigate the influence of some input parameters of the shotcrete model on the time-dependent behaviour of the shotcrete lining. These parameters include the time-dependent stiffness/strength parameters, creep and shrinkage parameters and steel fibre parameters. The variation in shotcrete strength classes causes a noticeable influence on the development of shotcrete compressive strength with time, particularly during the first days of application. The creep and shrinkage strain cause a considerable reduction in the development of the shotcrete stress with time. The impact of steel fibre content is determined, and the result indicated that the development of plain shotcrete stresses with time is lower than that of the reinforced shotcrete. In addition, a comparison study is performed to analyse the tunnel lining behaviour using both shotcrete model and an elastic analysis. Significant differences in shotcrete lining stresses are achieved when using the elastic analysis while the shotcrete model results in a reasonable result that can be used for the design requirements. 

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