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TRUSSES
Page 2


TRUSSES
CONTENTS :
1. Introduction.
2. Plane truss.
3. Statical determinacy and stability of trusses.
4. Analysis of statically determinate plane truss.
5.   Sign conventions used.
6.   Method of joints.
7.   Identification of zero force members.
8.   Examples on method of joints.
9.   Method of sections.
10. Examples on method of sections.
11. Exercise problems.
Page 3


TRUSSES
CONTENTS :
1. Introduction.
2. Plane truss.
3. Statical determinacy and stability of trusses.
4. Analysis of statically determinate plane truss.
5.   Sign conventions used.
6.   Method of joints.
7.   Identification of zero force members.
8.   Examples on method of joints.
9.   Method of sections.
10. Examples on method of sections.
11. Exercise problems.
INTRODUCTION :
A truss is an articulated (skeletal) structure with hinged
or ball and socket joints. It is an assemblage of slender
bars fastened together at their ends by smooth pins or ball
and socket joints acting as hinges.
Plane truss: A truss consisting of members which lie in a
plane and are loaded in the same plane is called a plane
truss. Ex: Roof truss, bridge truss, etc.
Space truss: A truss made up of members not lying in
the same plane is referred to as space truss. Ex: Electric
power transmission tower, microwave tower, etc.
Page 4


TRUSSES
CONTENTS :
1. Introduction.
2. Plane truss.
3. Statical determinacy and stability of trusses.
4. Analysis of statically determinate plane truss.
5.   Sign conventions used.
6.   Method of joints.
7.   Identification of zero force members.
8.   Examples on method of joints.
9.   Method of sections.
10. Examples on method of sections.
11. Exercise problems.
INTRODUCTION :
A truss is an articulated (skeletal) structure with hinged
or ball and socket joints. It is an assemblage of slender
bars fastened together at their ends by smooth pins or ball
and socket joints acting as hinges.
Plane truss: A truss consisting of members which lie in a
plane and are loaded in the same plane is called a plane
truss. Ex: Roof truss, bridge truss, etc.
Space truss: A truss made up of members not lying in
the same plane is referred to as space truss. Ex: Electric
power transmission tower, microwave tower, etc.
APPLICATIONS
Plane Truss
Space Truss
Trussed Bridge Braced Frame
Page 5


TRUSSES
CONTENTS :
1. Introduction.
2. Plane truss.
3. Statical determinacy and stability of trusses.
4. Analysis of statically determinate plane truss.
5.   Sign conventions used.
6.   Method of joints.
7.   Identification of zero force members.
8.   Examples on method of joints.
9.   Method of sections.
10. Examples on method of sections.
11. Exercise problems.
INTRODUCTION :
A truss is an articulated (skeletal) structure with hinged
or ball and socket joints. It is an assemblage of slender
bars fastened together at their ends by smooth pins or ball
and socket joints acting as hinges.
Plane truss: A truss consisting of members which lie in a
plane and are loaded in the same plane is called a plane
truss. Ex: Roof truss, bridge truss, etc.
Space truss: A truss made up of members not lying in
the same plane is referred to as space truss. Ex: Electric
power transmission tower, microwave tower, etc.
APPLICATIONS
Plane Truss
Space Truss
Trussed Bridge Braced Frame
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FAQs on PPT: Structural Analysis - Engineering Mechanics - Civil Engineering (CE)

1. What is structural analysis?
Ans. Structural analysis is a branch of engineering that deals with determining the behavior and strength of structures under different loads and environmental conditions. It involves studying and predicting the stability, stiffness, and deformations of structures to ensure their safety and performance.
2. What are the different methods used in structural analysis?
Ans. There are several methods used in structural analysis, including: - Finite Element Method (FEM): This numerical technique divides the structure into small elements to analyze its behavior and solve complex equations. - Matrix Structural Analysis: It uses matrix algebra to analyze the behavior of structures by considering their stiffness and load distributions. - Classical Methods: These include methods like the method of joints and the method of sections, which are used for simpler structural analysis problems.
3. Why is structural analysis important in engineering?
Ans. Structural analysis is crucial in engineering as it ensures the safety, reliability, and efficiency of structures. By analyzing the behavior of structures, engineers can identify potential flaws, weaknesses, or failures, allowing them to design and construct buildings, bridges, and other structures that can withstand various loads, such as wind, earthquakes, or heavy traffic.
4. What are the main steps involved in structural analysis?
Ans. The main steps in structural analysis typically include: - Modeling: Creating a mathematical representation of the structure, considering its geometry, materials, and boundary conditions. - Load Determination: Identifying and quantifying the different types of loads acting on the structure, such as dead loads, live loads, wind loads, or seismic loads. - Analysis: Applying appropriate analytical techniques, such as finite element analysis or matrix analysis, to determine the structural response and behavior. - Results Interpretation: Analyzing and interpreting the results obtained from the analysis to assess the structure's safety, stability, and performance. - Design Optimization: Modifying the structure's design if necessary to improve its efficiency, cost, or structural integrity.
5. What are the common challenges faced in structural analysis?
Ans. Some common challenges in structural analysis include: - Complex geometries: Analyzing structures with irregular shapes or complex geometries can be challenging due to the difficulty in modeling and analyzing their behavior accurately. - Material properties: Accurately determining material properties, such as the strength, stiffness, and behavior under different conditions, is crucial for reliable structural analysis. - Dynamic loads: Analyzing structures subjected to dynamic loads, such as earthquakes or vibrations, requires advanced techniques to capture their dynamic response accurately. - Computational limitations: Performing detailed and accurate structural analysis may require significant computational resources, which can pose challenges in terms of time and cost. - Safety regulations: Ensuring compliance with safety regulations and codes is essential in structural analysis, but it can add complexity and constraints to the design process.
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