Quasi-static nonlinear seismic assessment of a fourth century A.D. Roman Aqueduct in Istanbul, Turkey

Gonen, Semih
Pulatsu, Bora
Erdogmus, Ece
Karaesmen, Engin
Karaesmen, Erhan
The majority of architectural heritage consists of load-bearing masonry components made up of stone units and relatively weak mortar joints, yielding potential weak planes for masonry structures where tension and shear failures are expected to occur. Advanced nonlinear analyses are required to simulate these phenomena and predict the corresponding nonlinear structural behavior of historic masonry constructions. In this context, this paper presents a model of a stone masonry Roman aqueduct (the Valens Aqueduct), constructed in the fourth century A.D. in Istanbul, Turkey, to explore the seismic capacity and behavior using the discrete element method (DEM). The employed modeling approach comprises distinct rigid blocks interacting along their boundaries based on the point-contact hypothesis. Thus, the discontinuous stone skeleton of the masonry aqueduct is represented explicitly in the computational model. First, a validation study was conducted on the laboratory experiment to demonstrate the capabilities of the adopted modeling approach. Then, a discontinuum model representing the Valens Aqueduct was used to assess the seismic capacity of the structure under gradually increasing lateral forces. The numerical simulations gave insight into the structural response of the aqueduct from the elastic range to total collapse. Additionally, parametric research was performed considering joint properties, namely the joint tensile strength, contact stiffness, joint friction angle, and compressive strength of the masonry, to quantify the effects of contact parameters on the displacement response of the DEM model. Further inferences were made regarding the modeling parameters, and practical conclusions were derived.


Performance improvement studies of masonry houses using elastic post-tensioning straps
Türer, Ahmet; KORKMAZ, HASAN HÜSNÜ (2007-04-25)
Unreinforced masonry houses are composed of building blocks with weak inter-binding action between them which commonly possess low tensile strength. The principal tensile stresses generated by out-of-plane bending and in-plane shear forces cannot be tolerated well and leads to heavy structural damage and brittle collapse beyond linear capacity of the material. Remedies such as externally applied mesh reinforcement and post-tensioning improves post and pre-cracking performances; however, yielding of reinforc...
Experimental investigation of uplift on seismic base isolators /
Erkakan, Evren; Caner, Alp; Department of Civil Engineering (2014)
Elastomeric rubber bearings reinforced with steel shims, are used to provide structural support in vertical direction and allow horizontal movements for the structure subjected to earthquake and thermal loads. Generally, it is known that tensile stress or uplift may occur when the structure is subjected to strong ground motion or structure have large height-to-width aspect ratio to develop a stability concern subjected to lateral loads. The main focus of this research is to investigate the change in charact...
Seismic Strengthening with Precast Concrete Panels - Theoretical Approach
Baran, Mehmet; Canbay, Erdem; Tankut, Tugrul (2010-01-01)
An economical, structurally effective and practically applicable seismic retrofitting technique has been developed on the basis of the principle of strengthening the existing hollow brick infill walls by using high strength precast concrete panels. The technique would not require evacuation of the building and would be applicable without causing much disturbance to the occupant. For this purpose, a total of eighteen reinforced concrete frames with hollow brick infill walls were tested under reversed cyclic ...
Seismic behaviour of the old-type gravity load designed deteriorated RC buildings in Cyprus
Safkan, Ismail; Sensoy, Serhan; Ertuğrul, Zehra (2017-12-01)
Corrosion related deterioration of reinforced concrete buildings is often studied by the structural engineering community. The literature reveals the fact that modelling of deteriorated members requires a unique consideration due to brittle section behaviour. The late adaptation of seismic regulation rules and lack of decent quality construction material supply results a vulnerable building category in the island of Cyprus. This paper examines the vulnerable building category by combining concrete strength ...
Seismic behavior of double walls with continuity reinforcement
Binici, Barış; Canbay, Erdem (null; 2015-07-21)
The conventional precast construction has deficiencies especially related to its connections between structural elements. Hence, its use in earthquake zones has been limited. However, the seismic performance of these systems can be improved by a semi-precast system, namely the double wall system. In this structural system, both precast and cast-in-situ concrete elements are utilized during the construction period, i.e. precast concrete shells are benefitted as a formwork to place cast-in-situ concrete. In t...
Citation Formats
S. Gonen, B. Pulatsu, E. Erdogmus, E. Karaesmen, and E. Karaesmen, “Quasi-static nonlinear seismic assessment of a fourth century A.D. Roman Aqueduct in Istanbul, Turkey,” Heritage, pp. 401–421, 2021, Accessed: 00, 2021. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85104823800&origin=inward.