Condition assessment and strengthening of aged structures: Perspectives based on a critical case study (original) (raw)

Structural Audit of Old Building And It's Strengthening : Review

International Journal of Scientific Research in Science and Technology, 2020

We are building the structures rapidly in the area where there is requirement of the structures. Every structure has its own service life. Every structure is designed by assuming its life of existence. Some of the structures gets more life than expected and some gets fail in achieving its life. Any technology or material has its limitation to withstand. Many of the structures of R.C.C. are located in Seismic prone area. The structures gets damaged due to earthquake and the structures which becomes old should be checked that whether it has the strength of existence or not. The structures should be audited timely for the safety of the human life as well as for the nearby structures. The structures can be checked by various methods of Non-Destructive Test (Rebound Hammer Test, Ultrasonic Pulse Velocity Method, Pulse Echo Method, Probe Penetration Test, Destructive Test. Rebound Hammer Test of Non-Destructive Test is used in this paper to check the strength of an institutional building. When examining the structure, this paper aims to expand the life of structure. Different techniques of Retrofitting is given to the structural member which is unsafe. By applying the retrofitting, the structure can be made safe.

Influence of Ageing and Deterioration of Masonry on Load Bearing Capacity of Historical Building

2012

Numerous heritage buildings in the former Eastern Europe that were neglected in the past are severely deteriorated due to ageing and moisture problems. The paper summarizes experimental and numerical work carried out on 150 yrs. old Kolizej Palace in Ljubljana (Slovenia) which has recently been demolished, despite the overall opinion among conservators that it should be preserved. Experimental tests proved almost completely saturated conditions in the ground level of the building, while all the stories above were in almost dry condition. The results of tests on masonry revealed that moisture content and state of deterioration affected both strength and stiffness properties of built masonry in that extend so that the previous estimations and calculations regarding the state of the structure and its static load bearing capacity were too optimistic. Both storey and global response non-linear seismic analysis have proved that building in its current condition is far below the current se...

Structural Health Monitoring, Rehabilitation and Retrofitting of Old Building

2019

Structures such as residential buildings, commercially used buildings, bridges and others getting deteriorated and damage due to certain conditions such as excessive use of structure beyond its life time, environmental conditions, not using the structure for which it is built and the lastly use of inadequate material during construction. Structural health monitoring will provide the type of damage and its effect on structure. In this study, we are going to discuss regarding the different methods used in assessment of structural health monitoring and depending upon the type of damage and how it should be rehabilitated. One of the sample building of our college is being considered and some methods are discussed which are best suitable for rehabilitation and retrofitting.

Editorial-Special Issue on Structural Rehabilitation of Historic Buildings-IJMSI

International Journal of Materials and Structural Integrity, 2011

Biographical notes: Oguz C. Celik's research focuses on the seismic evaluation, design, and retrofit of existing buildings and bridges, including historic timber and masonry structures. His work addresses the protection of such structures under extreme events, e.g., earthquakes, using seismic energy dissipation systems and advanced composite materials. He is a member of several national and international committees. He has been involved in many real-life seismic rehabilitation and retrofit projects in Turkey, Europe, and in Asia, including Ottoman Imperial mosques, Roman and Byzantine churches, cisterns, and aqueducts. He has published more than 80 publications in national and international journals, conference proceedings, and books. Significant experimental and theoretical work has been done so far in the field of structural damage detection, evaluation, and rehabilitation of historic buildings. Major earthquakes over the last 20 years in Turkey, Indonesia, Italy, Chile, New Z...

REHABILITATION AND RETROFITTING OF BUILDING STRUCTURES

Retrofitting reduces the vulnerability of damage of an existing structure during a future earthquake. It aims to strengthen a structure to satisfy the requirements of the current codes for seismic design. In this respect, seismic retrofit is beyond conventional repair or even rehabilitation. The principles of seismic retrofit refer to the goals, objectives and steps. The steps encompass condition assessment of the structure, evaluation for seismic forces, selection of retrofit strategies and construction. The applications include different types of buildings, industrial structures, bridges, urban transport structures, marine structures and earth retaining structures. The benefits of retrofitting include the reduction in the loss of lives and damage of the essential facilities, and functional continuity of the life line structures. For an existing structure of good condition, the cost of retrofitting tends to be smaller than the replacement cost. Thus, the retrofitting of structures is an essential component of long term disaster mitigation. It was proposed to seismically upgrade a seven story non-ductile concrete framed building of early nineties vintage. Analysis results revealed that the structures did not have sufficient structural capacity to resist even a moderate earthquake. To ensure a higher level of safety, reduce the risk of exorbitant repair costs and minimize building downtime after an earthquake, it was intended that the seismic upgrade of the structural system will target the performance standard of ‘immediate occupancy’. A dual stage approach was used to address this complex retrofit issue. The first part consisted of providing robust concrete moment frames in each direction using the time tested jacketing methodology. This ensured adequate strength and stiffness to the structure.