Seismic Performance and Retrofitting of Steel Building
Bulbul Ahmed,
S. M. Zahurul Islam
Issue:
Volume 3, Issue 1, June 2019
Pages:
1-10
Received:
6 November 2018
Accepted:
20 November 2018
Published:
18 June 2019
Abstract: Some special Engineering firms are taken for rehabilitation by Performance based seismic design (PBSD). The existing building that has high value of facilities is important to make functional after immediate post-earthquake. Current codes and provisions cannot cover all structures located in active seismic zone and these structures are not capable of withstanding seismic action. Furthermore, heavy active earthquakes in urban areas have obviously established an urgency to measure performance of the existing building, upgrade and strengthen these seismic undersupplied structures. Many researchers worked in recent years to measure the performance of the building structures and develop various strengthening and rehabilitation techniques to improve the seismic performance of structures. The main objectives of this research are to evaluate the seismic performance of the steel frame building is designed as a multi-storey office building under seismic action located in Timisoara, Romania and using pushover analysis for the Life Safety performance level under an earthquake hazard level with 10% probability of exceedance in 30, 50, 100, 225, 475 and 975 years. The seismic performance of the building is measured by the push-over analysis by FEM software SAP2000. For this push over analysis, the target displacement of the top of the building is measured for life safety performance. The demand curve for the life safety, emergency occupancy, Local damaged, structural damaged, collapse of the building is conducted for different seismic actions. Capacity curve of the building is compared to the demand curve for checking the performance mentioned above. The capacity curve is less than the demand curve for all seismic actions. The building must be retrofitted for increasing the performance during seismic actions. The steel building is retrofitted by providing the steel bracing. The bracing size used is TUB-168.3x4 mm in the direction of tension and the performance of the building is tested by using pushover analysis for the same conditions that are done for unbraced structure. The performance of the building again determined for the same seismic actions. The lateral displacement of the building has significantly improved. The capacity curve coincides the first four accelerations for unbraced structure. The capacity curve is more than the demand curve and coincide all demand curves for all return periods and all accelerations for braced frame. The size of concentric tension brace is bigger; that is why no plastic hinges formed for all peak ground accelerations.
Abstract: Some special Engineering firms are taken for rehabilitation by Performance based seismic design (PBSD). The existing building that has high value of facilities is important to make functional after immediate post-earthquake. Current codes and provisions cannot cover all structures located in active seismic zone and these structures are not capable ...
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RF Communication and IoT Paradigms System Proposal for Effective Consumption and Equity Distribution of Community Water in Developing Countries: A Case Study
Pierre Tsafack,
Florin Hutu,
Emmanuel Tanyi,
Bruno Allard
Issue:
Volume 3, Issue 1, June 2019
Pages:
11-20
Received:
12 June 2019
Accepted:
10 July 2019
Published:
24 July 2019
Abstract: Water scarcity poses a serious threat to the population in the most areas of developing countries. In addition to that, the traditional manual nearby approach of following up the water distribution network is unable to ensure an effective and equity use of the small water resources available. A dedicated real-time monitoring system based on radio frequency (RF) communication and internet of things (IoT) paradigms is proposed in this paper. This monitoring system is essential and constitutes a proposed solution for the local water management and equity distribution of the available poor water resources. An alert system recalls users to any abnormal water usage to reduce water loss or to check and solve usual leakages. A customer’s water consumption visualization as well as a setting of his desired consumption alert system are performed using a home dashboard; the monitoring of the system by the water utility company is achieved using a web-based system through Thingspeak cloud computing platform. For an immediate and easy local implementation of the prototype, the system technology was chosen in already validated most cases; in other words, Commercial-Off-The-Shelf (COTS) components were used. For better and optimum results, most dedicated similar COTS components will be selected using the already running systems.
Abstract: Water scarcity poses a serious threat to the population in the most areas of developing countries. In addition to that, the traditional manual nearby approach of following up the water distribution network is unable to ensure an effective and equity use of the small water resources available. A dedicated real-time monitoring system based on radio f...
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