Shear resistance of pinned connections of precast members to monotonic and cyclic loading

Psycharis, IN; Mouzakis, HP

dc.contributor.author	Psycharis, IN	en
dc.contributor.author	Mouzakis, HP	en
dc.date.accessioned	2014-03-01T11:47:17Z
dc.date.available	2014-03-01T11:47:17Z
dc.date.issued	2012	en
dc.identifier.issn	01410296	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/38109
dc.subject	Connections	en
dc.subject	Cyclic response	en
dc.subject	Design of dowels	en
dc.subject	Monotonic response	en
dc.subject	Pinned connections	en
dc.subject	Precast	en
dc.subject	Prefabrication	en
dc.subject	Seismic design	en
dc.subject	Shear design	en
dc.subject	Shear resistance	en
dc.title	Shear resistance of pinned connections of precast members to monotonic and cyclic loading	en
heal.type	other	en
heal.identifier.primary	10.1016/j.engstruct.2012.03.051	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.engstruct.2012.03.051	en
heal.publicationDate	2012	en
heal.abstract	One of the major issues in the design of precast structures against earthquakes is the proper design of their connections, mainly the beam-to-column joints. Many different types of such connections are used worldwide, as monolithic, emulative and dry pinned ones. The latter case is the most common solution in southern Europe and elsewhere for single-storey or low-rise precast buildings, and is the subject of the experimental research reported in this paper. The experiments were performed at the Laboratory for Earthquake Engineering of the National Technical University of Athens, Greece in the framework of the European FP7 project, SAFECAST. Precast beam and column elements connected with dowels were tested under monotonic and cyclic, pure shear loading and the research was focused on several design aspects, as the shear ductility capacity of the connections and the effect of various parameters on their strength. The parameters examined include the diameter D of the dowels, their number, their distances d and dn from the edges in the longitudinal and the transverse direction of the beam respectively, and the strength of the grout of their ducts. Improvements in the design were also proposed and tested experimentally. The results show that, for small values of the ratio d/. D, the strength of the connection is lower in the pull direction than that in the push direction for both monotonic and cyclic loading, due to the early spalling of the cover concrete that occurs. Compared to the strength for monotonic loading, the cyclic response shows significantly lower resistance, less than half the monotonic one. The results for cyclic loading also show that significant values of shear ductility can be achieved by dry pinned joints, provided that the concrete cover of the dowels has sufficient thickness. Comparisons between the experimental results obtained for various design parameters show that secondary effects related to the number of the dowels can occur for large forces during monotonic loading, but are less important for cyclic response. A formula is proposed for the calculation of the shear strength of pinned connections, which can be used in seismic design. © 2012 Elsevier Ltd.	en
heal.journalName	Engineering Structures	en
dc.identifier.doi	10.1016/j.engstruct.2012.03.051	en
dc.identifier.volume	41	en
dc.identifier.spage	413	en
dc.identifier.epage	427	en