000019030 001__ 19030
000019030 005__ 20170118182256.0
000019030 04107 $$aeng
000019030 046__ $$k2017-01-09
000019030 100__ $$aHaber, Zachary
000019030 24500 $$aGrouted Splice Connections for Accelerated Bridge Construction With Shifted Plastic Hinging

000019030 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019030 260__ $$b
000019030 506__ $$arestricted
000019030 520__ $$2eng$$aAccelerated bridge construction (ABC) has gained popularity in urban areas where construction risk and traffic delays need to be minimized. The use of prefabricated elements is essential in most ABC projects to meet tight scheduling demands. Due to lack of knowledge regarding non-linear performance of connections, prefabricated substructure elements have been utilized more frequently in areas of low seismicity compared with areas with higher seismic hazard. Connections employing grouted coupler splices are becoming one of the more popular options for some U.S. transportation agencies. Previous studies have shown that precast columns with grouted splice connections behave similar to cast-in-place columns when subjected to non-linear cyclic loading. However, these connections have also been shown to disrupt plastic hinge formation, which results in premature failure and reduced displacement ductility. This paper presents the preliminary results from an experimental study on precast concrete columns with grouted splice moment connections. The primary goal of the study is to develop new connection details employing grouted splices that exhibit improved seismic performance compared with previously tested connections details. Four 0.42-scale bridge column models were designed based on Caltrans’ Seismic Design Criteria with different aspect ratios to represent flexural and flexural-shear dominated configurations. Of the four models, two precast columns were designed such that plastic hinging forms above the grouted couplers. In previous studies, columns employing these couplers exhibited concentrated plastic rotation at the column-footing interface, which resulted in premature bar rupture and reduced ductility. Thus, the proposed design method shifts plastic hinging to a region with higher plastic rotation capacity to increase ductility and improve seismic performance. Precast columns are compared with a corresponding set of cast-in-place column models that establish baseline performance. All four columns were subjected to slow cyclic lateral loading in a single cantilever configuration. Hysteretic force-displacement relationships, damage observation and energy dissipation for the precast models are compared with like results from corresponding CIP column models. Furthermore, quantification of the displacement components that contribute to the total lateral displacement is performed to assess the hinging behavior of the precast column compared with CIP column.

000019030 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019030 653__ $$aPrecast; grouted splice; column; ABC; shifted hinge

000019030 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019030 720__ $$aHaber, Zachary$$iMackie, Kevin$$iAl-Jelawy, Haider
000019030 8560_ $$ffischerc@itam.cas.cz
000019030 8564_ $$s1173813$$uhttps://invenio.itam.cas.cz/record/19030/files/2711.pdf$$yOriginal version of the author's contribution as presented on USB, paper 2711.
000019030 962__ $$r16048
000019030 980__ $$aPAPER