Investigation of crack in concrete structure of an elevated expressway due to expansion from chemical reactions in concrete | |
| Author | Natdanai Burakitpaahai |
| Call Number | AIT Thesis no.ST-13-06 |
| Subject(s) | Toll roads--Finite element method Toll roads--Concrete--Cracking |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Structural Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | According to structural health monitoring conducted on expressway structures, it is found that several hundreds of concrete piers and pile caps suffer from large crack. The inspection reveals that map cracking along with trace of efflorescence were developed in pile cap. In pier, map cracking and spalling were observed over pier surface. The concrete expansion due to chemical reaction is suspected as primary cause of the damage. As a result, this study aims to verify if the concrete mass expansion is the major cause of crack or not by making use of finite element method. The three-dimensional model of expressway superstructure and substructure are constructed and linear elastic analysis scheme was adopted in this study. The loads induced onto structures comprise thermal expansion, representing concrete chemical reactions, and dead loads from self weight of structures. The analysis results show that the effect of concrete expansion in pile cap create identical damage in numerical model and the actual expressway structures. In addition, the effect of service load will not damage expressway structures |
| Year | 2013 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Structural Engineering (STE) /Former Name = Structural Engineering and Construction (ST) |
| Chairperson(s) | Punchet Thammarak; |
| Examination Committee(s) | Pennung Warnitchai;Noppadol Phien-wej; |
| Scholarship Donor(s) | Royal Thai Government Fellowship; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2013 |