000018645 001__ 18645
000018645 005__ 20170118182234.0
000018645 04107 $$aeng
000018645 046__ $$k2017-01-09
000018645 100__ $$aRosales, Victor
000018645 24500 $$aCyclic Behavior of Foundation - Wall Connection in Cross Laminated Timber Shear Walls

000018645 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000018645 260__ $$b
000018645 506__ $$arestricted
000018645 520__ $$2eng$$aWithin the scope of sustainable construction, cross laminated timber (CLT) has a number of attributes that makes it an attractive alternative to build mid-rise buildings. Nevertheless, since the CLT elements are almost rigid panels, a critical matter of the seismic behavior of this construction system is the connections hysteretic response, because these links are responsible of giving a suitable ductility capacity and energy dissipation to the CLT structure subjected to seismic movement. Besides, the CLT panels in Chile are made of radiata pine timber, which is softer and lighter than the timber used worldwide to manufacture this structural material. This work presents the study of a foundation – wall connection by means of laboratory testing and numerical simulations. A set of hold down connectors and CLT walls are tested subjected to both quasi-static monotonic and cyclic loading protocols. Different fasteners configuration are analyzed, as well as load directions parallel and perpendicular to timber grain. Based on these laboratory results, two hysteretic constitutive laws (Saws models and pinching4 model) are calibrated using OpenSees simulations, taking into account the strength and stiffness degradation of the connectors, and the pinching behavior of the load – displacement curves. Results show good fitting between the simulated and the measured force - displacement curves for every connection tested and for both constitutive laws, but pinching4 model exhibits better adjustment than Saws model, particularly for the cyclic tests. Finally, using the calibrated numerical models of the hold down connectors, the cyclic behavior of a full scale 2.95 x 2.95 m CLT shear wall is explored. The simulation and test results show that the CLT panel rotates almost as a rigid body, and the nonlinear response of the connectors provides the ductility and energy dissipation for the wall under the cyclic displacement test, giving a displacement ductility over 3 with a drift capacity of almost 1,0%. Moreover, numerical model results suggest that the friction between wall and foundation should not be discarded or over simplified during structural analysis or design of CLT structures, because it provides an important part of the lateral load capacity of the wall.

000018645 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000018645 653__ $$aCLT shear wall; hold down connector; OpenSees

000018645 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000018645 720__ $$aRosales, Victor$$iOpazo, Alexander$$iBenedetti, Franco Paolo
000018645 8560_ $$ffischerc@itam.cas.cz
000018645 8564_ $$s837727$$uhttps://invenio.itam.cas.cz/record/18645/files/1906.pdf$$yOriginal version of the author's contribution as presented on USB, paper 1906.
000018645 962__ $$r16048
000018645 980__ $$aPAPER