000018351 001__ 18351
000018351 005__ 20170118182218.0
000018351 04107 $$aeng
000018351 046__ $$k2017-01-09
000018351 100__ $$aLee, Chin-Long
000018351 24500 $$aForce-Based Beam-Column Element With Multispring Models for Modelling Post-Tensioned Rocking Members

000018351 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018351 260__ $$b
000018351 506__ $$arestricted
000018351 520__ $$2eng$$aPost-tensioned rocking beams and columns are popularly used in earthquake-resistant structures because of their selfcentring and low-damage response characteristics. Rocking actions in these members arise from the open-and-close action at their two end joints. A post-tensioned prestressing tendon passing through the members and the joints provides the axial and moment continuity between the members and the joints. Rocking at member interior joints may also be provided for segmental rocking members, which are usually used as bridge piers. Because the plane sections of the rocking members at the joints do not remain plane during the rocking action, the traditional beam-column finite elements based on classical plane-section beam theories are no longer applicable to simulate the rocking motions. As a result, a new type of beamcolumn finite element is needed. In this paper, a new rocking beam-column element is proposed. The new element allows multiple rocking joints to be anywhere within the beam-column members, and, therefore, is applicable to both traditional end rocking members and segmental rocking members. It is derived based on the mixed formulation that interpolates the force field exactly but satisfies the strain-displacement compatibility weakly. The formulation allows the relaxation of plane-section assumption at the rocking joints using the idea of multispring models. The new element can be readily used to simulate the seismic response of a large-scale structures with multiple rocking beams and columns. The new element accurately simulates the experimental results of a rocking column undergone a series of bi-axial loading. To demonstrate its advantages in large-scale simulations, the new element is also used to model the dynamic response of a large-scale structure. The results indicate that this new element shows highly promising potentials for large-scale structural analysis.

000018351 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018351 653__ $$arocking member; self-centring; beam-column element; multispring; unbonded post-tensioned

000018351 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018351 720__ $$aLee, Chin-Long
000018351 8560_ $$ffischerc@itam.cas.cz
000018351 8564_ $$s323106$$uhttps://invenio.itam.cas.cz/record/18351/files/1284.pdf$$yOriginal version of the author's contribution as presented on USB, paper 1284.
000018351 962__ $$r16048
000018351 980__ $$aPAPER