Two-way bending experimental response of URM walls subjected to combined horizontal and vertical seismic excitation. (15th September 2020)

• Record Type: Journal Article
• Authors: Sharma, S.; Tomassetti, U.; Grottoli, L.; Graziotti, F.
• Is Part Of: Engineering structures. Volume 219(2020)
• Publication Date: 2020-09-15
• Subjects: Out-of-plane -- Two-way bending -- Incremental dynamic tests -- Unreinforced masonry -- Vertical excitation; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2020.110537
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: Dynamic testing of full-scale URM walls in the OOP (two-way bending) direction. URM wall subjected to simultaneous vertical and OOP seismic excitation. Formulation to evaluate initial stiffness of URM walls under OOP excitation. Abstract: This paper presents the results of incremental dynamic tests on full-scale unreinforced masonry (URM) walls constructed with an intentionally weakened mortar under two-way bending excitation in the out-of-plane (OOP) direction. A specimen was also subjected to simultaneous vertical and horizontal excitation. Walls were also tested in boundary conditions that have not been previously reported in the literature. Emphasis was placed on the development and interpretation of a characterisation test to estimate the torsional shear strength of bed-joints, a parameter of prime importance in the OOP two-way bending behaviour of URM walls. Analytical formulation to estimate the initial stiffness of walls based on the theory of plates is then proposed and validated. Being the first experimental campaign to address the dynamic OOP two-way bending response of full-scale URM wall panels provided the opportunity to propose simple yet mechanically rational methodologies with which both the peak force resistance as well as the displacement at which such resistance is attained can be easily estimated.