You are a Structural Engineer working in a structural repair and rehabilitation consulting firm. You have...

You are a Structural Engineer working in a structural repair and rehabilitation consulting firm. You have been assigned to provide the answers and solutions for the following job: “Some cracks were observed on a suspended reinforced concrete slab on an existing public building. As these cracks raised public concerns, the owner has decided to carry out a structural investigation into the cause of cracking to check the structural integrity and determine the remedial works to be done.” (a) Outline and explain the process of investigation that would be recommended to identify the causes of the cracks.

(b) State Four (4) possible causes of the cracks?

(d) From the investigation, it was found that the cracks are due to structural overloading. Recommend a method to strengthen the existing slab and suggest a method to repair the crack.

Solutions

Expert Solution

Answers

A) step 1: Discuss with client or owner if building basic questions about when was building constructed, ask for building drawing or detail drawing If possible and followed by ask when was 1st crack appeared and also ask about concrete failing deflection, large crack, water leakage.

Step2: Visit site along with drawings of respective bldg, check whether bldg construction were as per drawings, check whether there is change in structure match it with drawings, capture photo and give date to that and Mark the width of crack it shouldn't be more than .3mm, check all other possible cause such as tilting of any structural member, deflection leakages, corrosion.

Step3: Understand cracks and it's cause, find type of crack it is live or dead etc.

B) Causes

1.Crack may be temperature variation

2.Permeability of concrete

3.Corrosion of reinforcement

4.Poor structural design

5.Creep

6.Shrinkage

7.Moisture variation footing movement, etc.

C) Suitable test would be

1.Rebound hammer test,

2.Ultrasonic pulse velocity and

3.Pullout test

D) Methods for strengthening and crack filling

1.Epoxy injection

2.Gravity filling,

3.Grouting and sealing,

4.Stitching ,etc

Ally Wells answered 1 month ago

Next > < Previous

Related Solutions

Kanchana has been working as an environmental engineer at a consulting firm for over twenty-five years....

Kanchana has been working as an environmental engineer at a consulting firm for over twenty-five years. Well-known for settling disputes between his corporate clients before litigation must be pursued, Kanchana often analyses technical data, particularly distributions of solid particle pollution, presented by disputing parties to help them reach a compromise on the cost of environmental clean-up. For example, two parties may be separated from one another by a strip of land; however, each party must fiscally contribute in keeping the...

You are working in a rehabilitation setting performing exercise testing and prescription. You have a subject...

You are working in a rehabilitation setting performing exercise testing and prescription. You have a subject who has a measured airway resistance of 25 cm H2O/L/sec and a measured static compliance of 110 ml/cm H2O. Select correct or incorrect for each of the following statements. Mark either Incorrect or Correct 1.This subject's elastance is higher than normal. 2. This subject's time constant is greater than 2500 seconds 3. This subject most likely has emphysema. 4. This subject likely has a...

You are working for Mindak LLP, an accounting consulting firm, as a research and accounting specialist....

You are working for Mindak LLP, an accounting consulting firm, as a research and accounting specialist. Rowling Inc., an important manufacturing client, has asked you to research and explain the accounting rules for property, plant and equipment issues that the company is experiencing. The client wants you to reference and briefly explain the GAAP rules provided in the FASB codification. Rowling Inc. will then use your business professional memo to look up the rules in the codification. Instructions: Research the...

You are working for Mindak LLP, an accounting consulting firm, as a research and accounting specialist. Rowling...

For this assessment, you are an advanced practice nurse working on an inpatient rehabilitation unit. You...

For this assessment, you are an advanced practice nurse working on an inpatient rehabilitation unit. You care for many patients after they experience strokes, paralysis after spinal cord injuries, severe burn injuries, and amputations after illness or injury. The patients stay for 3-8 weeks depending on the severity of their illness and their baseline level of strength. Each patient participates in at least 3 hours per day of a combination of physical, occupational, and/or speech therapy in order to speed...

You are a construction engineer working for a large utility contractor. The project you are working...

You are a construction engineer working for a large utility contractor. The project you are working on is in New York City (Manhattan). You are installing approximately 1,000 L.F. of 48” dia. RCP for storm drains. Invert elevation ranges from 9’ to 14’ below grade. Pay lines for the trench are indicated in the attached specification. Soil characteristics range from SM to SC, based on the Unified Soil Classification. What considerations would you make with regards to a trenching &...

You have recently been employed by a consulting firm as a management accounting specialist. The firm...

You have recently been employed by a consulting firm as a management accounting specialist. The firm specialises in the provision of information to companies that have discrete, short term problems. Your first assignment is to a company called Malvern who specialises in construction equipment and is having trouble identifying the reasons for volatility in the profitability of its main product: The Hammer. The managers of Malvern are aware that there are a number of factors which are potentially causing them...

You are a nurse manager working at an outpatient stroke rehabilitation clinic in Hamilton, Ontario. You...

You are a nurse manager working at an outpatient stroke rehabilitation clinic in Hamilton, Ontario. You are interested in whether client wait times at your clinic (from arrival time to the time the client is served by the health care professional) differ from those at another outpatient stroke rehabilitation clinic in Oakville, Ontario. The table below provides the client wait times that you have obtained for a random sample of clients from both clinics. You know from previous studies that...

You are a Network and security engineer for the XYZ Consulting Corporation, which is a leading...

You are a Network and security engineer for the XYZ Consulting Corporation, which is a leading network designer and security provider for the small-scale offices. As the Network and security engineer you are required to perform the following tasks. Task 1: Propose a network design for small scale office (Ex: Business type, departments, building plan). You are free to assume the name of the office and number of staffs ➢ Purpose of the Project ➢ Network overview (ex: connecting PCs,...

1. A consulting firm must decide now whether to hire a young engineer. The main purpose...

1. A consulting firm must decide now whether to hire a young engineer. The main purpose of this engineer would be to work on a contract that the firm hopes to win. This new contract will begin in 2 months and last for 4 months. If the firm hires the engineer and wins the contract, the firm will make a profit of $6000 on the new contract (this figure allows for the cost of the new engineer during the 4...

Subjects