Seismic Vulnerability Evaluation of Bridges in Memphis and Shelby County, Tennessee

1993 ◽  
Vol 9 (4) ◽  
pp. 803-816 ◽  
Author(s):  
S. Pezeshk ◽  
T. S. Chang ◽  
K. C. Yiak ◽  
H. T. Kung
Keyword(s):  
Seismic Vulnerability ◽  
Seismic Retrofitting ◽  
Screening Procedure ◽  
Seismic Zone ◽  
Structural Elements ◽  
Seismic Evaluation ◽  
Earthquake Preparedness ◽  
Vulnerability Evaluation ◽  
Earthquake Loss ◽  
Shelby County

The focus of this paper is to develop a screening procedure to obtain information and assess vulnerability of bridges located in the New Madrid seismic zone (NMSZ). This screening methodology includes structural elements, site, foundation, and importance of the bridge. An inventory of the river-crossing bridges in Memphis and Shelby County is made using the developed screening procedure; potentially hazardous bridges that require further detailed seismic evaluation and/or immediate seismic retrofitting are identified. The results of this study are important for future maintenance and improvement, earthquake loss estimates, seismic hazard/risk reduction, and earthquake preparedness/rescue plans for river-crossing bridges in the NMSZ.

Seismic Vulnerability Evaluation of Essential Facilities in Memphis and Shelby County, Tennessee

1995 ◽  
Vol 11 (4) ◽  
pp. 527-544 ◽  
Author(s):  
T. S. Chang ◽  
S. Pezeshk ◽  
K. C. Yiak ◽  
H. T. Kung
Keyword(s):  
Seismic Hazard ◽  
Evaluation System ◽  
Seismic Vulnerability ◽  
Structural Characteristics ◽  
Seismic Zone ◽  
Seismic Evaluation ◽  
Study Results ◽  
Earthquake Loss ◽  
Shelby County ◽  
Fire Stations

This study is designed to assess potential seismic vulnerability of highly occupied or heavily used essential facilities, including 202 schools, 22 hospitals, and 74 fire stations, in Memphis and Shelby County, Tennessee which may be strongly affected by earthquakes in the New Madrid seismic zone (NMSZ). The seismic evaluation system uses existing data such as site, subsurface condition, foundation, structural characteristics, and results of previous site-specific seismic hazard studies. Results of the study reveal the current overall risk of damage of the essential facilities subject to the recognized seismic hazard in the study area and identify a preliminary pool of the most vulnerable facilities for the highest priority to be used in developing a detailed study to identify retrofit/replacement plans in the near future. Results also provide useful information for long-term upgrade strategies for essential facilities and general buildings in the Memphis area. The study results are important for future detailed study, facility maintenance and improvement, earthquake loss estimates, seismic hazard/risk reduction, and earthquake preparedness/rescue plans in the region.

scholarly journals SEISMIC VULNERABILITY OF REINFORCED CONCRETE BRIDGES IN PAKISTAN

2022 ◽  
Vol 28 (2) ◽  
pp. 93-105
Author(s):  
Muhammad Khalid Hafiz ◽  
Qaiser-uz-Zaman Khan ◽  
Sohaib Ahmad
Keyword(s):  
Seismic Hazard ◽  
Seismic Vulnerability ◽  
Seismic Hazard Assessment ◽  
Highway Bridges ◽  
Concrete Bridges ◽  
Seismic Retrofitting ◽  
Seismic Zone ◽  
Code Of Practice ◽  
Recent Earthquakes ◽  
Existing Bridges

Different researchers have performed seismic hazard assessment studies for Pakistan using faults sources which differ from Building Code of Pakistan (BCP 2007) with diverse standard deviations. The results of seismic hazard studies indicate that BCP requires gross revision considering micro and macro level investigations. The recent earthquakes in Pakistan also damaged bridge structures and some studies have been conducted by different researchers to investigate capacity of existing bridges. The most of bridge stock in Pakistan has been designed assuming seismic loads as 2%, 4% and 6% of dead loads following West Pakistan Code of Practice for Highway Bridges. The capacity of eight selected real bridges, two from each seismic zone 2A, 2B, 3 & 4 is checked against BCP demands. Static and dynamic analyses were performed and the piers were checked for elastic limits. It is established that piers are on lower side in capacity and the bridges in zone 2A are generally less vulnerable. Whereas the bridges in zone 2B, 3 and 4 are vulnerable from medium to very high level. Hence, an in-depth analytical vulnerability study of bridge stock particularly in high-risk zone needs to be conducted on priority and appropriate seismic retrofitting schemes need to be proposed.

scholarly journals The Cartis Form for the Seismic Vulnerability Assessment of Timber Large-Span Structures

Buildings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 45
Author(s):  
Beatrice Faggiano ◽  
Giacomo Iovane ◽  
Andrea Gaspari ◽  
Eric Fournely ◽  
AbdelHamid Bouchair ◽  
...  
Keyword(s):  
Seismic Vulnerability ◽  
Precast Concrete ◽  
Structural Type ◽  
General Description ◽  
Seismic Zone ◽  
Building Structures ◽  
Timber Structures ◽  
Recent Past ◽  
Seismic Vulnerability Assessment ◽  
Large Span

Italy is located in a very active seismic zone, and many earthquakes have marked the country, some of them in the recent past. In order to take adequate measures of seismic prevention and protection, in the last decades, the Italian Civil Protection Department (DPC) initiated a survey and introduced a specific form for the quick and/or post-seismic assessment of buildings. This is useful to obtain statistics on the types of structures and their vulnerability and a judgement on the damage, leading to a decision about the possibility of reuse and/or the level of retrofitting to be applied. Those activities have been developed since the beginning of 2000. This task is currently carried out by the Italian DPC-ReLUIS project research, line WP2 on the inventory of building structures, setting up the CARTIS form for any structural type, like masonry, reinforced concrete, precast concrete, steel, and timber structures, the latter being mainly related to large span buildings, extensively used in Italy. In this context, the paper presents the first draft of the CARTIS form for large span timber structures that provides a general description for typical structural schemes, through the singular points commonly considered as seismic structural vulnerabilities. Moreover, the statistics on timber large span structures based on a sample of 10 buildings is presented.

Multi-Performance Innovative Infill Panels

2016 ◽  
Vol 847 ◽  
pp. 492-504
Author(s):  
Marco Vailati ◽  
Giorgio Monti ◽  
Giorgia di Gangi
Keyword(s):  
Seismic Vulnerability ◽  
Building Codes ◽  
Structural Elements ◽  
Low Intensity ◽  
Repair Costs ◽  
Infill Panels ◽  
Out Of Plane ◽  
Structural Parts ◽  
Recent Earthquakes ◽  
Innovative Concept

Infill panels and partitions are widely used non-structural elements in reinforced concrete buildings, characterized by a significant seismic vulnerability as testified by disastrous collapses observed during recent earthquakes, for both in-plane and out-of-plane actions. The most advanced building codes foresee mandatory verifications of these elements, both when designing a new building and when assessing the seismic adequacy of an existing one. Moreover, recent evaluations have shown that, after low-intensity earthquakes, damage of non-structural parts strongly influences repair costs for typical multi-storey buildings. In this paper, an innovative concept for infill panels and partitions is presented, in which (either concrete or clay) blocks are connected, rather than with the usual mortar layers, by means of recycled-plastic joints. A comparison is also carried out with respect to conventional infill typologies, by evaluating their performance in terms of energy efficiency and acoustic. A brief description of seismic performances of innovative infill panels are shown at the end of work.

BASE ISOLATION FOR SEISMIC RETROFITTING OF DAMAGED BUILDINGS

2015 ◽  
Vol 2 (1) ◽  
Author(s):  
Marco Mezzi ◽  
Paolo Petrella
Keyword(s):  
Cost Effectiveness ◽  
Seismic Vulnerability ◽  
Base Isolation ◽  
Seismic Retrofitting ◽  
Isolation System ◽  
Existing Building ◽  
Base Isolation System ◽  
The Cost ◽  
Original Configuration

The paper deals with the retrofitting of r/c buildings damaged by the earthquake adopting the base-isolation. The case of one building is analyzed in detail. The seismic vulnerability of the building in the original configuration is assessed. A classification of the possible conventional works concerning repair, retrofit, seismic enhancement is carried out dealing with the structural effectiveness, impact, control in application and lifetime, related indirect works, cost. The main result is a tentative classification of the issues related to the insertion of a base-isolation system below an existing building aimed at its seismic enhancement, avoiding or relied strongly limiting other works in the building elevation. The retrofitting strategies, the enhancement levels, the application solutions are critically revised statement under the experience of the real cases faced with, also paying attention to the cost-effectiveness ratios.

BASE ISOLATION IN SEISMIC RETROFITTING OF R/C BUILDINGS

2016 ◽  
Vol 3 (2) ◽  
Author(s):  
Alberto Dusi ◽  
Marco Mezzi ◽  
Tan Teng Or
Keyword(s):  
Reinforced Concrete ◽  
Seismic Vulnerability ◽  
Base Isolation ◽  
Human Life ◽  
Lessons Learned ◽  
Seismic Retrofitting ◽  
Reinforced Concrete Buildings ◽  
Building Vulnerability ◽  
Concrete Buildings ◽  
2009 L’Aquila Earthquake

The paper, based on the authors’ direct involvement in managing actual retrofitting design, reports on seismic vulnerability assessment, design and implementation issues related to the seismic retrofit of reinforced concrete buildings through base isolation. The retrofitting interventions design of damaged buildings involves three aspects: the damage survey, the assessment of the vulnerability of building in its original structural configuration, the design of intervention needed to reduce the building vulnerability up to a conventional level, normally indicated by the seismic standards. In the first part of the paper, the experience achieved in the retrofit of reinforced concrete buildings damaged by the Italian 2009 L’Aquila earthquake is presented by referring to a typical intervention designed by the authors. Topics related to conventional vs base isolation retrofitting strategies, structure’s performance, safeguard of human life, construction efficiency and repairing cost are analyzed with reference to actual case study. Lessons learned from the Italian experience have been critically applied to the design of retrofit intervention of a building, designed according to the current Nepal set of codes and under completion at the time of the earthquake, damaged by the Gorkha 2015 earthquake. In the second part of the paper activities carried out for the definition of a specific site seismic input, for the dynamic characterization of the building and for the design of the base isolation retrofit are presented.

Advances in Earthquake Loss Estimation and Application to Memphis, Tennessee

1997 ◽  
Vol 13 (4) ◽  
pp. 739-758 ◽  
Author(s):  
Masanobu Shinozuka ◽  
Stephanie E. Chang ◽  
Ronald T. Eguchi ◽  
Daniel P. Abrams ◽  
Howard H. M. Hwang ◽  
...  
Keyword(s):  
United States ◽  
Seismic Hazard ◽  
Earthquake Engineering ◽  
Loss Estimation ◽  
Local Data ◽  
Earthquake Loss Estimation ◽  
Engineering Research ◽  
Central United States ◽  
Earthquake Loss ◽  
Shelby County

In recent years, a number of research efforts conducted through the National Center for Earthquake Engineering Research (NCEER) have focused on assessing seismic hazard and vulnerability in the Central United States. These multi-year, coordinated multi-investigator research efforts culminated in two loss estimation demonstration projects for Memphis (Shelby County), Tennessee, that evaluate losses associated with buildings and lifelines, respectively. While conducted independently, these two loss estimation studies share similar approaches, such as the emphasis on using detailed local data. Furthermore, the significance of the projects derives not only from the advances made by individual investigators, but also from the innovations developed in synthesizing the various studies into a coordinated loss estimation effort. This paper discusses the NCEER buildings and lifelines loss estimation projects with emphasis on methodological advances and insights from the loss estimation results.

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