Strengthening of Reinforced Concrete Bridge Columns Against Blast Loading and Comparison of Different Methods of Strengthening
Journal Title: Passive Defense - Year 2023, Vol 14, Issue 3
Abstract
The design of elements under blast load came to the attention of scientists after World War II. Extensive research has been done in the last fifty years on the behavior of structures against blast loads and their reaction. Due to the intensity and magnitude of blast loads, it is important to carry out the most appropriate scheme in terms of economics and safety for a structure. If the design is not done correctly and with the right criteria selected, it may impose exorbitant costs on the execution of a structure. The type of blast in this research is blast in the open air and unrestricted surface. A surface blast is a blast that occurs at a surface or at a very close distance to the ground. In this research, different methods of strengthening the column of concrete bridges under blast load will be investigated. The considered strengthening methods include changing the arrangement of the rebars on the cross-sectional area, increasing the amount of cross-sectional rebars, using FRP rebars and increasing or changing the geometric shape of the column cross-sectional area; Then the most appropriate, economical and safest strengthening scheme is selected and a suitable strengthening model for the above system is presented. The structural models studied in this research are investigated at an identical blast level (1000 kg TNT at 3 meters from the structure). The software used in analyzing the studied models is SAP2000 software. The results showed that some strengthening methods, such as increasing the amount of cross-sectional rebars, increase structural responses. Also, among the strengthening methods selected in the research, replacing FRP rebars instead of regular rebars in the reinforced concrete bridge columns is the most effective and the best method of strengthening these structures against the blast loads.
Authors and Affiliations
Pouya Hassanvand, Mojtaba Hosseini
Keywords
Related Articles
- EP ID EP731471
- DOI -
- Views 53
- Downloads 0
Presenting a Model to Identify the Relationship Between Effective Factors in the Construction and Establishment of Field Hospitals with a Passive Defense Approach
One of the most obvious aspects of successful management and planning during the imposed war was the management of aid to the wounded in the form of establishing military field hospitals with passive defense approaches....
Steganography Audio Based on Zero-Tree Wavelet Transform Algorithm
Audio steganography is very important, equally steganography in other media (image, video, etc.). In this paper is presented steganography of audio based on embedded zero-tree waveleten transform algorithm. Improving the...
Evaluation and Defense Survey of Urmia City Using GIS
Passive Defense in a country like Iran can be used to plan and create barriers to deter enemy attacks and minimize vulnerabilities in cities and in line with the issues of sustainable development and security of cities,...
Evaluation of the Most Important Effective Indicators in Improving the Safety and Health of Sports Venues in Tehran
Determining effective indicators in the safety and health of sports facilities is very effective and important in improving the health of human resources/ The main goal of this research is to identify and evaluate the in...
Design Analysis of Noshabad Owi Underground Complex from the Perspective of Passive Defense
Defense architecture is one of the hidden values of historical contexts and passive defense has different criteria based on the type of use and different dangers in historical periods. Today, with the advancement of tech...