000020001 001__ 20001
000020001 005__ 20170118182350.0
000020001 04107 $$aeng
000020001 046__ $$k2017-01-09
000020001 100__ $$aAl-Hanoon, M. Hisham
000020001 24500 $$aNumerical Simulation of Typical Damage Patterns for Multi-Story RC Frame Structures With Infill Walls Under Explicitly Consideration of Out-Of-Plane Behavior

000020001 24630 $$n16.$$pProceedings of the 16th World Conference on Earthquake Engineering
000020001 260__ $$b
000020001 506__ $$arestricted
000020001 520__ $$2eng$$aIn case of an earthquake a typical unreinforced masonry (URM) infill wall is subjected to a three dimensional acceleration field and undergoes simultaneous in-plane and out-of-plane loading. Depending on the direction of seismic action, the observed damage mechanisms on URM may be classified as in-plane (IP) and out-of-plane (OoP). In-plane damage is caused mainly by inter-story drift. The typical in-plane damage mechanisms can be classified as cracking due to separation from the structural frame, cracking due to horizontal bed joint sliding, cracking due to tension across the diagonals of the panel, and cracking due to crushing of panel corners. Out-of-plane over turning collapse is the most dominated mechanism in perpendicular wall direction. The overturning effects are increased by the damage due to the horizontal in-plane components of seismic action (shear cracking) and the inter-story drift in out-of-plane direction, which causes the separation from the upper beam. After L’Aquila earthquake in 2009, a conducted damage survey showed that the greatest damage is located on the lower stories (up to the second story in taller buildings). On the contrary, collapse due to out-of-plane mechanisms is expected on the upper stories of buildings (due to higher expected accelerations). Therefore, the collapse due to out-of-plane mechanisms has to be ascribed to the early presence of heavy in-plane induced cracking. In fact, in-plane actions can cause disconnection of the infill panels from structural elements, reducing their seismic capacity. Since the mid-1950s, a number of distinct approaches in the field of analysis of in-filled frames lead to different analytical models. The equivalent strut model is the most common one. A main disadvantage of the strut models is the disability to represent the out-of-plane response of an infill masonry panel. A new model was been proposed, which consists of diagonal beam-column members utilizing fiber element cross sections. It is suitable for nonlinear time history analysis. The model considers both the in-plane and out-of-plane response of the infill, as well as the interaction between IP and OoP capacities. Since the building stock is often mostly composed of reinforced concrete frame buildings with URM, collapse simulation of buildings under seismic loads becomes an important issue. In this paper, the failure mechanisms of the URM will be numerically simulated by using the proposed state of the art strut model. A set of reinforced concrete frame with URM walls with different number of stories will be investigated to examine typical damage pattern and to quantify the damage for RC frames representing different story classes. Finally the achieved results will be used to come up with a proposal for the description of damage to primary and secondary structural elements in multistory and high-rise buildings. Results can be implemented into the EMS-98 or its up-date to an International Macro seismic Scale (IMS).

000020001 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000020001 653__ $$aIn-plane; Out-of-plane; Damage mechanism, masonry infill walls.

000020001 7112_ $$a16th World Conference on Earthquake Engineering$$cSantiago (CL)$$d2017-01-09 / 2017-01-13$$gWCEE16
000020001 720__ $$aAl-Hanoon, M. Hisham$$iAbrahamczyk, Lars$$iSchwarz, Jochen
000020001 8560_ $$ffischerc@itam.cas.cz
000020001 8564_ $$s940234$$uhttps://invenio.itam.cas.cz/record/20001/files/4917.pdf$$yOriginal version of the author's contribution as presented on USB, paper 4917.
000020001 962__ $$r16048
000020001 980__ $$aPAPER