Damage analysis and assessment in bridge like structures due to high explosive blast load

Download
index.pdf
2016
Erdolu, Ömer
Show full item record
294
views
116
downloads
In recent years, number of explosion attacks on civilian structures is on rise. Fast methods for damage analysis of civilian structures exposed to external blast loads are especially important in the preliminary design stage of structures to implement frequent design changes to come up with more resistant structures. Single degree of freedom (SDOF) approach is a preferable method for fast damage analysis of structures exposed to blast loads. In this thesis, a new damage level calculation tool for external blast loaded bridge-like-structures is developed based on the SDOF approach. Case studies are performed for two concrete columns with different cross-sections. For the verification of the developed tool, comparison of the results obtained by the tool is performed with the results obtained by the explicit finite element solver AUTODYN and SDOF solver RC BLAST. For the assessment of the damage level in AUTODYN analyses, existence of non-eroded elements in any section is checked. If elements are eroded throughout the whole cross-section, the structure is assumed not to sustain any load. Results show that the developed tool and RC Blast yield similar results for the failure explosive mass. It is also seen that if same side-on overpressure levels are used in the developed tool as determined by the AUTODYN analysis, failure explosive masss predicted by the developed code and AUTODYN agree considerably well.  
Explosives., Damages., Blasting., Bridges.
http://etd.lib.metu.edu.tr/upload/12620661/index.pdf
https://hdl.handle.net/11511/26200
Graduate School of Natural and Applied Sciences, Thesis

Suggestions

Seismic Risk Assessment of Masonry Buildings in Istanbul for Effective Risk Mitigation
Erberik, Murat Altuğ (SAGE Publications, 2010-11-01)
Unreinforced and non-engineered masonry buildings are highly vulnerable to seismic hazard and constitute a significant percentage of earthquake losses, including both casualties and economic losses. This study presents an engineering application on seismic safety assessment of unreinforced masonry (URM) buildings in Istanbul, Turkey, a metropolitan city under very high seismic risk. Nearly 20,000 masonry buildings were examined through a two-stage assessment procedure in order to identify the addresses of t...
Rebuilding Syria from the Rubble: Recycled Concrete Aggregate from War-Destroyed Buildings
Rashwani, Abdulkader; Kadan, Bakry; Choubi, Sepehr Seyedian; Alhammoudi, Yousef; Hanein, Theodore; Guadagnini, Maurizio; Akgül, Çağla; Provis, John (2023-4-01)
The ongoing Syrian civil war began in 2011 and has left more than 130,000 buildings destroyed, 70% of which are RC buildings. When the war is over, it is estimated that the millions of displaced refugees will return within 8years, thus requiring a rapid urban redevelopment of the country. This study examined the feasibility of reusing concrete from destroyed buildings as recycled concrete aggregate (RCA), and will assist in developing much-needed recommendations for the sustainable redevelopment of Syria’s ...
Strengthening of reinforced concrete frames by custom shaped high strength concrete masonry blocks
Arslan, Güray; Polat, Mustafa Uğur; Department of Civil Engineering (2009)
Located on one of the highly active seismic fault systems in the world, the building stock in Turkey is mainly composed of reinforced concrete frames with 4-5 stories. Due to design and construction deficiencies resulting from the use of unqualified personnel and insufficient supervision, many of these buildings lack lateral stiffness, ductility and strength. For many structures, there is a need to alleviate these deficiencies by means of some rehabilitation techniques prior to earthquakes. One approach als...
Performance-based seismic rehabilitation of damaged reinforced concrete buildings
Sucuoğlu, Haluk; Gunay, MS (American Society of Civil Engineers (ASCE), 2004-10-01)
A building stock consisting of 130 medium-rise reinforced concrete buildings were damaged moderately during the recent earthquakes in Turkey. These buildings were rehabilitated by using simple, cost-effective methods where the newly added shear walls comprised the primary lateral load resisting system. In the presented study, different seismic performance evaluation procedures are tested first on the samples of damaged buildings for predicting their observed performances. Then the expected performances of t...
RESISTANCE MECHANISMS IN RC BUILDING FRAMES SUBJECTED TO COLUMN FAILURE
Sucuoğlu, Haluk; ALTIN, S (American Society of Civil Engineers (ASCE), 1994-03-01)
There is a damage potential for the columns of building frames due to either unexpected causes such as vehicle impact, boiler explosion, or terrorist attack, or due to design or construction deficiencies aggravated by an earthquake, severe wind, or excessive foundation movement. This paper investigates the redistribution paths of released forces resulting from a column failure and identifies the basic structural defense mechanisms developed in a damaged building frame. Extensive analytical studies revealed ...
Citation Formats
Ö. Erdolu, “Damage analysis and assessment in bridge like structures due to high explosive blast load,” M.S. - Master of Science, Middle East Technical University, 2016.
METU IIS - Integrated Information Service open@metu.edu.tr