A study of the influence of the rigidity of joints on the dynamic response of steel structures

Vrakas, AA; Papadrakakis, M

dc.contributor.author	Vrakas, AA	en
dc.contributor.author	Papadrakakis, M	en
dc.date.accessioned	2014-03-01T02:52:50Z
dc.date.available	2014-03-01T02:52:50Z
dc.date.issued	2011	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/36109
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-80054810447&partnerID=40&md5=ad2a40ae431519729e980495831dd6bf	en
dc.subject	Beam-to-column joints	en
dc.subject	Detailed finite element modeling	en
dc.subject	Direct-integration nonlinear dynamic analysis	en
dc.subject	M-φ curves	en
dc.subject	Rigidity of joints	en
dc.subject	Seismic response	en
dc.subject	Steel frames	en
dc.subject.other	Accelerograms	en
dc.subject.other	Beam elements	en
dc.subject.other	Beam-to-column joints	en
dc.subject.other	Centro earthquake	en
dc.subject.other	Computational effort	en
dc.subject.other	Detailed modeling	en
dc.subject.other	Dynamic behaviors	en
dc.subject.other	Finite element modeling	en
dc.subject.other	Finite element models	en
dc.subject.other	Finite element simulations	en
dc.subject.other	Finite-element discretization	en
dc.subject.other	Frame models	en
dc.subject.other	Geometric models	en
dc.subject.other	Geometric non-linearity	en
dc.subject.other	Hybrid simulation	en
dc.subject.other	Moment-rotation	en
dc.subject.other	Nodal displacement	en
dc.subject.other	Non-linear dynamic analysis	en
dc.subject.other	Nonlinear dynamic response	en
dc.subject.other	Nonlinear seismic response	en
dc.subject.other	Numerical models	en
dc.subject.other	Parametric analysis	en
dc.subject.other	Seismic excitations	en
dc.subject.other	Static loads	en
dc.subject.other	Steel frame	en
dc.subject.other	Steel frames	en
dc.subject.other	Structural elements	en
dc.subject.other	Time history	en
dc.subject.other	Civil engineering	en
dc.subject.other	Computational methods	en
dc.subject.other	Computer simulation	en
dc.subject.other	Dynamic analysis	en
dc.subject.other	Dynamic models	en
dc.subject.other	Dynamic response	en
dc.subject.other	Earthquakes	en
dc.subject.other	Engineering geology	en
dc.subject.other	Finite element method	en
dc.subject.other	Plates (structural components)	en
dc.subject.other	Rigidity	en
dc.subject.other	Seismic response	en
dc.subject.other	Steel construction	en
dc.subject.other	Steel structures	en
dc.subject.other	Structural dynamics	en
dc.subject.other	Structural frames	en
dc.subject.other	Rigid structures	en
dc.title	A study of the influence of the rigidity of joints on the dynamic response of steel structures	en
heal.type	conferenceItem	en
heal.publicationDate	2011	en
heal.abstract	The objective of this paper is to study the influence of the rigidity of joints on the nonlinear dynamic response of steel structures under seismic excitation. We consider bolted beam-to-column joints with extended end-plates. A detailed finite element simulation of the joints is performed using structural (beam and shell) and three-dimensional continuum (eight-node hexahedral solid) elements. Material as well as geometric nonlinearities with contact between the appropriate components of the connections are taken into account. The moment-rotation (M-φ) response of characteristic joints, subjected to static loads, is calculated and compared with experimental results and EC3 predictions for the validation of the corresponding numerical models. The dynamic response of steel frames is examined, with detailed modeling of their joints via structural elements according to the above study, capturing all types of nonlinearities. Frame members are modeled either with shell (full simulation) or with beam elements combined with proper compatibility constraints at the interfaces with the joints (hybrid simulation) accounting for the excessive computational effort required to perform nonlinear dynamic analyses with detailed finite element models. Implicit directintegration is implemented in order to study the nonlinear seismic response of the above frame models, while El Centro earthquake horizontal accelerogram is considered for the seismic excitation. In order to study the influence of the joints end-plate and bolts, parametric analyses are performed demonstrating the effect of each component on the overall dynamic behavior of steel structures. Time history curves of nodal displacements are displayed for the appropriate comparisons. The detailed finite element discretization of the joint and frame models is produced automatically from the corresponding geometric models.	en
heal.journalName	ECCOMAS Thematic Conference - COMPDYN 2011: 3rd International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering: An IACM Special Interest Conference, Programme	en