Week 12 Challenge

Aim:- Que (1):- Prepare a model of 3 x 25m prestressed I-girder superstructure for metro viaduct in STAAD by creating the nodes, beams, and supports along with necessary loads.  Answer:-  Staad Model Dead Load reaction Maximum Y = 490.687 kN  ,    Minimum Y = 434.655        …

1. Describe the DL & SIDL considerations for an open foundation. Answer: An open foundation in a Metro viaduct is designed to support the weight of the superstructure and the loads that the superstructure carries, including dead load (DL) and superimposed dead load (SIDL). Dead load includes the weight of the Metro…

1. Briefly describe about soil structure interaction in a pile foundation? Answer: Soil-structure interaction (SSI) refers to the complex interaction between the foundation of a structure (such as a pile foundation) and the soil on which it is built. In pile foundation design, SSI is an important consideration, as it can…

1. Explain how the pile caps should be designed considering the tilt and shift conditions and mention advantages of the same? Answer: Pile caps are reinforced concrete structures that distribute the load of a group of piles to the underlying soil. In some cases, the piles may experience tilt or shift due to soil settlement…

1. Explain the dead load calculations of a pier cap and a circular pier? Provide the values in KN/m. Inputs: Length=30m Volume of Pier cap=35 m3 Diameter of the pier = 2m Concrete density = 25KN/m3 Answer: Dead load is the weight of the structure and any permanent components, such as the pier cap and circular pier,…

1. What are piers and explain. Explain loads considered for calculating the total design force? Answer: Piers are vertical structural elements used to support and transfer the weight of a building or structure to the foundation or the ground below. Piers can be made of various materials such as concrete, masonry,…

Aim:-  Question (1): - Calculate the moment for the design of the pier cap considering reactions @ 250mm from the tip of the cantilever: D.L. (100kN), SIDL (80kN), & LL (120kN). The total length of the cantilever from the pier face is 4.5m. Consider an impact of 1.3 for live load.  Answer:-  Given Data:-…

Aim:-  1) Mention the need for a metro rail in a developing economy. Answer:-  'Metro Rail' is a commuter-friendly transport providing the traveling public with a fast, safer, reliable, comfortable, pollution-free, affordable, convenient, and eco-friendly service. The high-capacity Metro Rail System would…

Aim:-  1) List the requirements for dimensioning of Elastomeric Bearing. Also, mention the notations: “a”, “b”, “ti”, “te”, “n” and “ts” a:- 420 mm b:- 420 mm ti:- 12 mm te:- 6 mm n:- 5 Nos ts:- 4 mm 2) Design an elastomeric bearing considering…

Aim:- Prepare and analyze a transverse model of the Deck slab with the following specifications. Given Data:-  Slab laid on top of 4 I-girders. Having supports spaced at 2.0m each. Having the following geometrical properties                    Thickness of slab…

Aim:- Prepare a longitudinal model of I-girder and analyze for all the loads with the following specifications Given Data:-  Grillage model of 4 I-girders with span length of 27.0m. Having supports at 0.700m from both ends. Having the following geometrical properties End Section:  Area = 1.218m2    …

Aim:-  Que (1):- What are the sectional properties we need upfront for designing a metro viaduct? What is the supporting software for identifying the sectional properties and designing them? Answer:-  Following are the sectional properties that are considered upfront for designing a metro viaduct. Area of section…

Q1. What are the structural components of a bridge? Explain in detail about the foundation, sub structure and super structure components of the bridge. Ans:  The structural components of a bridge are: Superstructure: Consists of Parapet/Railing and Girders. Substructure: Consists of Bearing,Pier Cap,Pier…

1. Why is a metro rail needed in countries with developing economy? What is your basic understanding on the differences between a conventional rail system and a metro rail system? Ans: Generally, in a developing country the population of the country increases fast. So it causes hindrace in the city for communicating to…

Aim: Q. A portal frame has following details: Portal beam having length of 4m and cross section of 300mm x 600mm (depth) and portal columns have height of 3m and cross section 300mm x 300mm. 1. The portal beam has two Bearing locations 1m from either end. The load from each bearing is 75 kN. Calculate the support reactions…

Aim The primary aim of this challenge is to arrive at optimum bearing articulation using two bearing and one bearing system. To model the bridge as per the given dimension and apply all the load combinations on it. Then to analyze the results. The substructure such as pier need to be checked by modelling the…

Aim To design pile foundation of a RCC slab bridge having dimensions “15” m span and “5” m height at abutment and width = 12 meters and having vertical capacity as 300 tonnes and horizontal capacity as 40 tonnes per pile. Also, to design the pile cap and its reinforcement. Size also to be fixed…

Aim:- Analysis & Design raft foundation of a box culvert bridge having 12 M span and 5.5 M height in STAAD pro and applying loads as per IRC 6. Que 1) Calculate the loads to be applied on the box as per IRC 6. Given Data:-  The span of structure = 12 M Height of structure = 5.5 M Safe bearing capacity…

Aim:- What is the difference between active and passive earth pressure? Design a well foundation for the pier. Calculate the steel in steining and kg/cumec for all other components of well foundation. Que 1) Difference between active and passive earth pressure? Active Earth Pressure Active state is developed when…

Aim:- Design the pile foundation in the abutment bridge considering the 28-meter span. Vertical capacity-250 tonne horizontal capacity - 40 tonnes. With abutment having backfill With abutment having RE wall. Also List different components of pile foundation and calculate steel quantity in pile. Design of pile…

Aim :-  Que ) What all checks need to be followed in the design of well foundation regarding the stability and the design. List out all the necessary clauses from IRC codes applicable. Answer - Following are the steps which is considered for designing of well foundation regarding the stability and the design as per IRC…

Aim: - To calculate the scour depth and fix span and type of foundation for linear waterway also to calculate the force which is acting on a bridge as per IRC 6. and what is zero shear and definition of liquefaction and its detail. Given Data:-  Linear waterway = 90 m Design discharge = 700 cumes Silt factor…

Aim:- To calculate the loads as per IRC 6 on the pile group for the abutment & Listing all the components of the well foundation. Given Data:-  Basic Design Detail Span and Cross section     Unit           1 C/c of exp joint   47.5 m 2 C/c of bearing    45.3…

Aim: To elaborate and explain theoretical questions on Pile and Well Foundations: For Pile Foundation To elaborate on how to fix number of piles in the deep foundations in a flyover in Delhi, listing all the loads acting on it and making all the combinations as per IRC 6. To explain what are the different factors that…

Aim:- To analyze and design of box culvert raft foundation using STAAD.Pro software and loads considering from IRC 6 are dead load, earth pressure, live load surcharge, braking forces, and class 70R vehicle loading     Que 1. Summarize your study for the bending moment, shear force and deflection diagrams…

Aim:- Design Of Open Pier Foundation as per IRC 6, IRC 78 & IRC 112 1) Calculate loads manually acting on pier foundation and design as per IRC 6,78 and 112 Load is calculated using IRC 6 and design is done using IRC 112. All the given detail are mentioned below. Given Date:- BASIC DESIGN DATA Span and Cross section Data…

Aim :- Design of Abutment foundation as per IRC 6, IRC 78 and IRC 112 1. Design the abutment foundation as per IRC 6 loads. Optimize the design as per IRC 112. The load acting on abutment foundation are calculated by using Serviceability Limit State (SLS) and Ultimate Limit State (ULS) criteria methods. All provided…

Aim To determine how the hydrology and geotechnical studies (preliminary and detail studies, zone of influence) are used in fixing span as per IRC standards and type of bridge with the clause applicable for the same. To determine Scour Depth at the Pier and Abutment location. To determine the measures taken to avoid scour…

1. Aim: To Define all loads to be applied in the abutment of the bridge as per IRC 6 and mention the clauses. Check for overturning and sliding of 4 m height of Abutment (from ground level), embedded 2 m in ground.  Theory: A bridge abutment is a structure which connects the deck of a bridge to…

1. Aim: Types of foundation and its slection criteria.  Theory: Foundation is the one which transmits the load from piers, abutments and wings to the ground. It ensures even distribution of the strata. It should be deep enough to prevent scour caused by the flow in the river. Foundation is required for structural…

Aim  To create a Bridge Structure and calculate the Water Current Forces, Centrifugal Forces, Wave Forces, Snow Loads, Temperature Loads and Barge Impact Load and applying the same on the StaadPro Model. Data Provided: Crest elevation wave = 3.0m max 4 - I girders r = 5 Cva = 3 Storm elevation = 8.5m Cr = 0.4 70RT…

Aim: To calculate Barge Impact load of the Panamax vessel on the bridge designed and shown in figure below. Data Provided: Dead weight = 52500 DWT No of containers = 4500 containers Each containers = 6.1TEU Speed of the barge = 60km/hr Length of the vessel = 294m Span of the bridge = 12.0m  width…

Aim  To calculate the Temperature Load on a Bridge in Delhi as shown below and applying the calculated loads on the StaadPro model. Data Provided:  Location of the bridge is Delhi Type of Bridge is RC Bridge Grade of concrete = M40 Box Girder Bridge of (1.5 x 1.5)m Web thickness = 0.3m Diameter of the pier…

Aim To Calculate the Snow Load accumulated on a Bridge of span 10m and width 18m as shown below and apply the calculated loads on the StaadPro model. Data Provided:  Span of bridge = 10m Width of bridge = 18m The snow is of settled type The deck of bridge is flat with β <30 degree.…

Aim: To calculate the Wave Load on the bridge superstructure shown in figure below and applying the resulting forces for modelling in StaadPro. Additional given data:  The maximum crest elevation for the wave = 3 m The deck of the slab is supported by three I Girders Height of Girder =1.7 m Top and bottom flange…

Aim: To calculate the centrifugal force for 70RT class vehicle for a bridge of span 12.0m having 7.0m carriageway with the radius of curvature 3.0m and speed of vehicle 75.0km/hour and to apply the same and do the analysis in STAAD.Pro. Given: Span of the bridge = 12.0m Width of Carriageway = 7.0m Radius…

Aim: To Calculate the water current forces for the bridge shown in above figure. Given data:  HFL is 2.00m above the foundation level Span of the bridge = 2 x 45.00 m Mean velocity Vmean = 3.00 m/s Assumption : Assuming circular piers of 1.70 m diameter Procedure: Water current forces are the forces…

Aim: To calculate the dead load, IRS live loads, Earth pressure load, wind load and seismic loads for the bridge structure at Ahmedabad Metro rail project and applying the loads in STAAD.Pro. Introduction: 1. IRS Live Loads In Week 3, we are introduced to IRS, that is, Indian Railway Standards. The lessons taught in this…

Aim To calculate the pipe loads acting on the given bridge and apply the loads on StaadPro. Introduction Introduction to utility Loads: Utility loads are due to the use of various utilities related to electrical, mechnical, architectural and functional elements. The self weight of these materials and live loads during…

Aim: To calculate the design wind loads for the bridges to be designed at Mumbai and apply the wind loads on StaadPro. Introduction: 1. Wind Loads The Bridge strcutures are subjected to wind lods if they are located in open terrain or near coastal zone or over a river where there will be seasonal monsoon winds and cyclones.…

Aim To calculate the Earthpressure acting on the abutṁent wall and applying on the staadpro.   Introduction Unit Weight of Soil Unit Weight of Soil is defined as the total weight of soil mass W per unit of total volme V.γ = W/V Dry Unit Weight: It is defined as the weight of dry soil Ws per unit Vome V.γd…

Aim For the I Girder bridge to be designed for the following data, the centre to centre distance of piers along the width of the bridge deck is 26m ,  Span of the bridge is 25m, Pier height is 10m, Apply the IRS railway loads and model in Staad pro and perform the  structural analysis. Introduction: In Week 3,…

Aim:  The aim of the challenge is the calculation of live loads as per IRC and modeling the same in Staadpro to perform the structural analysis of the given structure. Given: Width of the bridge deck is 7m ,  Span of the bridge is 24m, Pier size is 2 m diameter, The seismic zone is Zone III, Wind speed is 42…

A. Calculation of Dead Load on Deck: Since the Box Girder is symmetrical, we start volume calculation from the right hand side of the girder where individual widths are provided. Volume = (WidthxThicknessxSpan)m^3 for Rectangular portion. Volume=(0.5xBasexHeightxSpan)m^3 for Trainagular portion. 1) 1.361x0.225x12 = 3.6747m^3…