000019595 001__ 19595
000019595 005__ 20170118182328.0
000019595 04107 $$aeng
000019595 046__ $$k2017-01-09
000019595 100__ $$aMoustafa, Mohamed
000019595 24500 $$aOnline P-Delta Correction for Multi-Degree-Of-Freedom Hybrid Simulation Testing

000019595 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000019595 260__ $$b
000019595 506__ $$arestricted
000019595 520__ $$2eng$$aHybrid Simulation (HS) is a fast-growing computational/physical testing technique that can replace shaking table tests using an online computational substructure to update the input signal based on the feedback from the physical substructure. This paper presents the development and validation of a new Hybrid Simulation System (HSS) and communication scheme with online P-delta correction capabilities. The developed HSS utilizes readily available laboratory data acquisition (DAQ) systems along with inexpensive TCP/IP-Ethernet protocols to establish multi-degree-of-freedom communication between the physical and computational substructures. An approximate method for accounting for the P-delta effect from both of the gravity load and the vertical earthquake excitations was devised for application to bridge systems. The P-delta correction arithmetic operation is performed using a Digital Signal Processor (DSP) subroutine and relies on adjusting the lateral force feedback before it is sent back to the HS computational model to solve for the next displacement input step. The developed HSS comprises a novel hybrid computational model where part of the computations is performed using a finite element platform while another part is performed using a DSP subroutine. To verify the new system communication loop, several single and double free actuators, i.e. not attached to specimens, were used. Moreover, a repaired reinforced concrete bridge column-bent cap-box girder subassemblage was used to conduct a large-scale bidirectional HS trial tests using the developed system for further verification. Another similar bridge subassemblage specimen was used to conduct HS tests with and without including the P-delta correction to investigate and verify the correction method. The verification tests are discussed herein where the new communication scheme and the entire HSS were shown to be accurate.

000019595 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000019595 653__ $$aMDOF Hybrid Simulation; P-Delta Effect; Reinforced Concrete Bridges

000019595 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000019595 720__ $$aMoustafa, Mohamed$$iMosalam, Khalid
000019595 8560_ $$ffischerc@itam.cas.cz
000019595 8564_ $$s851633$$uhttps://invenio.itam.cas.cz/record/19595/files/3965.pdf$$yOriginal version of the author's contribution as presented on USB, paper 3965.
000019595 962__ $$r16048
000019595 980__ $$aPAPER