Naveed Ahmad

Dr. Naveed Ahmad

Stanford University, Stanford, California, USA
orcid

Research Focus & Metrics

Academic Career Length

17Years (2010-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 August 2012 in Earthquake Spectra
Verified
Journal Article
Closed access
QAQaisar Ali
Qaisar Ali
TSTom Schacher
Tom Schacher
MAMohammad Ashraf
Mohammad Ashraf
BABashir Alam
Bashir Alam
ANAkhtar Naeem
Akhtar Naeem
MUMuhammad Umar
Muhammad Umar
This paper presents experimental and numerical investigations conducted on typical dhajji buildings found in the northern mountainous areas of Kashmir and surrounding regions to evaluate their in‐plane lateral load response. The experimental work included an in‐plane quasistatic cyclic test on three full‐scale walls as well as monotonic tension and bend tests on main connections. The test results show that the dhajji‐dewari system of buildings possesses tremendous resilience against lateral forces. The function of connections, especially the connections between the vertical posts and bottom plate, control the performance of the system. The test results also indicate that although masonry infill does not contribute to lateral load capacity, it significantly increases the energy dissipation capacity of system. The data accrued from the tests has been used in nonlinear static push‐over analysis of the numerical models to develop simplified analytical tools for facilitating lateral load performance evaluation of dhajji structures.

11 September 2017 in Journal of Earthquake Engineering
Verified
Journal Article
Closed access
Naveed AhmadNaveed Ahmad
Naveed Ahmad
ASAsif Shahzad
Asif Shahzad
MRMuhammad Rizwan
Muhammad Rizwan
AKAkhtar Naeem Khan
Akhtar Naeem Khan
SASyed Muhammad Ali
Syed Muhammad Ali
BABashir Alam
Bashir Alam
Seismic performance assessment is carried out for reinforced concrete structure built in low-strength concrete lacking confining ties in beam-column joint. Shake-table tests were performed on 1/3rd scaled two-story frame using design-spectrum-compatible accelerogram, scaled to various target levels. The frame is observed with beam longitudinal bar slip and pullout. Joints with no confining ties experienced extensive damage, observed with cover/core concrete spalling. The frame could resist 70% of the design ground motion to remain within the code-specified drift limit. The code requirement for minimum column depth will not avoid joint damageability in case of low-strength concrete and joints lacking confining ties.

22 April 2014 in Natural Hazards
Verified
Journal Article
Closed access
PDF file
Naveed AhmadNaveed Ahmad
Naveed Ahmad
QAQaisar Ali
Qaisar Ali
HCHelen Crowley
Helen Crowley
RPRui Pinho
Rui Pinho

1 February 2019 in Engineering Structures
Verified
Journal Article
Closed access
AAAsim Abbas
Asim Abbas
MAMohammad Adil
Mohammad Adil
Naveed AhmadNaveed Ahmad
Naveed Ahmad
IAIzaz Ahmad
Izaz Ahmad

26 April 2018 in Bulletin of Earthquake Engineering
Verified
Journal Article
Closed access
PDF file
Naveed AhmadNaveed Ahmad
Naveed Ahmad
ASAsif Shahzad
Asif Shahzad
QAQaisar Ali
Qaisar Ali
MRMuhammad Rizwan
Muhammad Rizwan
AKAkhtar Naeem Khan
Akhtar Naeem Khan

1 November 2013 in Earthquake Spectra
Verified
Journal Article
Closed access
QAQaisar Ali
Qaisar Ali
AKAkhtar Naeem Khan
Akhtar Naeem Khan
MAMohammad Ashraf
Mohammad Ashraf
AAAwais Ahmed
Awais Ahmed
BABashir Alam
Bashir Alam
MUMohammad Umar
Mohammad Umar
Rubble‐stone masonry structures are found abundantly in the Asian countries along the Himalayan range. Such structures are usually constructed in dry‐stone masonry or are constructed in mud mortar, which makes them susceptible to damage and collapse in earthquakes. In order to study the seismic behavior of these structures, dynamic shake table tests on three reduced‐scale rubble‐stone masonry models were conducted. The models comprised a representative school building, a residential building, and a model incorporating simple cost‐effective features in the form of horizontal and vertical reinforced concrete elements. This paper presents the results of shake table tests carried out on rubble‐stone masonry buildings including: damage pattern, capacity curves, damage limit states, and response modification factors of these structures. Test data indicates that seismic performance of rubble‐stone masonry structures can be significantly improved by incorporating cost‐effective features such as vertical members and relatively thin horizontal bands.