Volume 17, Issue 4 (2017)
MCEJ 2017, 17(4): 63-75 |
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Investigation behavior of bearing 3D Panel wall developed by lateral load in independent and system states. MCEJ 2017; 17 (4) :63-75
URL: http://mcej.modares.ac.ir/article-16-1051-en.html
URL: http://mcej.modares.ac.ir/article-16-1051-en.html
Abstract: (8864 Views)
The three dimensional panels are one of the modern building systems which can be placed in the category of industrial buildings. It has always been tried to conduct many studies for identifying the behavior and upgrading the capacity of panels due to their earthquake resistance and high speed performance.
In this regard, in this research a comparative study of structural components behavior of the upgraded three-dimensional panels under lateral load in independent and system mode, is investigated. At the same time it is tried to study the effect of strengthening the three dimensional panels and system mode (independent wall, L-shaped and BOX-shaped walls) on the three-dimensional panels. In order to verify, the results of panel were compared with dimensions of 120 × 120 with laboratory results of Kabir and Jahanpour and the results indicate the validity of the model. In the following, twenty-four models with dimensions close to reality (360 × 360〖cm〗^2), are built with Abaqus software. Overall, six independent wall model, L-shaped, roofed L-shaped, BOX-shaped walls with symmetric loading, BOX -shaped wall with asymmetrical loading and roofed BOX-shaped wall were built. Then the models are strengthened without strengthened reinforcement and with strengthened reinforcements ( 10) with an angle of 30, 45 and 60 degrees. The applied lateral loading, is exerted by changing the location on the end wall. After applying the loading, the pushover curve is plotted from which the maximum lateral load bearing capacity, the absorbed energy are obtained. It is warth mentioning for drawing the push over curve the target displacement is determind by ATC 24 guideline. And also for drawing the histories careature ATC40 guidline is used.
The evaluation of results showed that the lateral load bearing capacity of L-shaped wall without strengthened reinforcement is not more than independent wall, but also it will be less. But by adding roof to the structure, the load bearing capacity will be increased due to reducing twisting effect. If strengthening the wall occurs, in roofed and without roofed modes, the capacity will be increased about 50 and 100 %. In BOX-shaped wall, in symmetric and asymmetric loading, the load bearing capacity will be increased about 200 and 50 % respectively. Now, if strengthened, the load bearing capacity in symmetric and asymmetric loading will be increased 3.5 and 2 times respectively. The effective angle of placement of strengthened reinforcement in the independent wall is 45 and 60 degrees. But in BOX-shaped and L-shaped walls, the use of strengthened reinforcement 45 degrees is recommended. In the L-shaped wall alone (not the entire system), the capacity will be increased 21 % and by adding roof, the load bearing capacity will be approximately two times. This mode in the BOX-shaped wall with symmetrical loading will be 63 %. By generally comparing the histories cerratures it is resulted that the L-shaped wall wich has the torsion originated from loading, has a lower energy dissipation in comparison with the models. And also if the exsting story loads to the integrated performance of the walls, it can.
In this regard, in this research a comparative study of structural components behavior of the upgraded three-dimensional panels under lateral load in independent and system mode, is investigated. At the same time it is tried to study the effect of strengthening the three dimensional panels and system mode (independent wall, L-shaped and BOX-shaped walls) on the three-dimensional panels. In order to verify, the results of panel were compared with dimensions of 120 × 120 with laboratory results of Kabir and Jahanpour and the results indicate the validity of the model. In the following, twenty-four models with dimensions close to reality (360 × 360〖cm〗^2), are built with Abaqus software. Overall, six independent wall model, L-shaped, roofed L-shaped, BOX-shaped walls with symmetric loading, BOX -shaped wall with asymmetrical loading and roofed BOX-shaped wall were built. Then the models are strengthened without strengthened reinforcement and with strengthened reinforcements ( 10) with an angle of 30, 45 and 60 degrees. The applied lateral loading, is exerted by changing the location on the end wall. After applying the loading, the pushover curve is plotted from which the maximum lateral load bearing capacity, the absorbed energy are obtained. It is warth mentioning for drawing the push over curve the target displacement is determind by ATC 24 guideline. And also for drawing the histories careature ATC40 guidline is used.
The evaluation of results showed that the lateral load bearing capacity of L-shaped wall without strengthened reinforcement is not more than independent wall, but also it will be less. But by adding roof to the structure, the load bearing capacity will be increased due to reducing twisting effect. If strengthening the wall occurs, in roofed and without roofed modes, the capacity will be increased about 50 and 100 %. In BOX-shaped wall, in symmetric and asymmetric loading, the load bearing capacity will be increased about 200 and 50 % respectively. Now, if strengthened, the load bearing capacity in symmetric and asymmetric loading will be increased 3.5 and 2 times respectively. The effective angle of placement of strengthened reinforcement in the independent wall is 45 and 60 degrees. But in BOX-shaped and L-shaped walls, the use of strengthened reinforcement 45 degrees is recommended. In the L-shaped wall alone (not the entire system), the capacity will be increased 21 % and by adding roof, the load bearing capacity will be approximately two times. This mode in the BOX-shaped wall with symmetrical loading will be 63 %. By generally comparing the histories cerratures it is resulted that the L-shaped wall wich has the torsion originated from loading, has a lower energy dissipation in comparison with the models. And also if the exsting story loads to the integrated performance of the walls, it can.
Keywords: Three-dimensional Panels, Independent and System mode, Upgrading the Load Bearing Capacity, Strengthening the Panel
Article Type: Original Manuscript |
Subject:
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Received: 2016/03/8 | Accepted: 2016/10/10 | Published: 2017/10/23
Received: 2016/03/8 | Accepted: 2016/10/10 | Published: 2017/10/23
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