Papers by Keyword: Infill Wall

Abstract: Based on the quasi-static test of single-layer, two-bay RC frame model, using DIANA finite element program, a finite element Macro-model of masonry-infilled frame structure was established, and nonlinear finite element analysis of frame structures filled with different masonry materials was conducted. As a result of the existence of infill walls, the failure modes of frame structure have been changed, and which is easy to cause shear failure at the top of frame columns. If masonry materials of infill walls are different, the effects of infill panels on frame structures will be different. Comparative analysis shows that the influence of clay bricks is the largest, followed by autoclaved bricks’ influence, while aerated concrete blocks’ influence is the smallest. Therefore, to avoid the associated failure mechanism caused by infill walls, lightweight masonry materials are suggested to be used in actual engineering.

Abstract: Using finite element software SAP2000 solid model element to simulate the infill walls filled wall by the elastic conditions, and to simplify the calculation model, the use of elastic mechanics calculated infill wall subjected to earthquake plane wall crack development trend of the structure designed to prevent cracks in the wall of the measures will certainly help.

Abstract: Majority of buildings in Turkey and in most developing countries are made with reinforced concrete frames infilled with clay tile brick walls. Despite this, influence of these walls is not accounted for in design. Past earthquake observations have shown that the infill walls have great influence on performance of buildings. In this paper, influence of the brick infill walls on strength and stiffness of RC buildings are presented through analytical results obtained for some typical buildings. Comparison of results showed that stiffness of the walls and their capacity is greatly influenced by the infill walls. The change in the strength and stiffness has been based on ratio of the wall area to the total floor area with providing expressions to determine these.

Abstract: The idea of strengthening the existing masonry infill walls of reinforced concrete (RC) frames has attracted many research groups in the last decade. The use of carbon fiber reinforced polymer (CFRP) strips along the diagonals of infills has become one major technique applied for this purpose. An experimental study conducted by the authors focused on the effect of aspect (height/width) ratio of hollow clay tile infills on the overall response attained by this strengthening methodology. Two different aspect ratios (HCT) were selected in the experimental study. However, a wider range of aspect ratios should also be investigated for design purposes. Therefore, a numerical model of the test frames are developed, which are validated by the experimental response curves. The basics of the numerical model that leads to a parametric study is the subject of this article.

Abstract: In the evaluation of the seismic performance of masonry-infilled RC frames, the main difficulty is determining the type of interaction between the infill and the frame, which has a major impact on the structural behavior and load-resisting mechanism. This paper addresses the connection modes of the RC frames and masonry panels in regulations in China. The method of flexible connection suggested in standard has not been widely used in actual engineering, and rigid connection was adopted in universal. The finite element model with interface element is advisable for simulating the interaction of the frames and panels, and the accuracy of the nonlinear finite-element models has been evaluated with experimental data. The comparison of the numerical and experimental results indicates that the models can successfully capture the highly nonlinear behavior of the physical specimens and accurately predict their strength and failure mechanisms.

Abstract: This study deals with the seismic assessment and retrofitting of existing non-ductile R/C structures and the issue of selecting effective strengthening solutions is addressed. A displacement based procedure using nonlinear static pushover analyses is adopted in order to assess the main characteristics of the original structure and to select valuable retrofitting strategies. The procedure is applied to a four-storey R/C frame tested at the JRC ELSA Laboratory some years ago. The R/C frame was designed for gravity loads without specific earthquake-resistant provisions. Accurate numerical models are developed to reproduce the seismic response of the R/C frame in both the original and retrofitted configurations. The effectiveness of two strengthening techniques is examined. First, a retrofitting intervention is carried out by adding a concrete shear wall to the short bay of the frame. This solution is efficient in controlling global lateral drift and thus reducing damage in structural members. Then, a retrofitting solution involving the introduction of eccentric steel bracing is investigated in order to reduce the displacement demand and to increase the energy dissipation capacity of the frame. Nonlinear dynamic analyses are performed to assess and compare the seismic response of the frame in the original and retrofitted configurations.

Abstract: Based on the experimental study, this paper analyzes the stress given by series of Structured Infilling-walls reducing vibration multi-functionally in the help of the finite element analysis software, ANSYS. It is a comprehensive comparative analysis that different structures, thickness of walls, storeys, and spans are included. The conclusion is drawn that filling-wall can improve the mechanical properties of multi-functional vibration-reducing structure of infilling-wall, which provides theoretical evidence for infilling wall multi-functional vibration-reducing structure under different circumstances that the infill wall stand the proportion provides certain theoretical basis. The appropriate brittle anti-pressure pieces can be fixed according to the comparative finding which also contributes a lot to the achievement of the purpose of this project.

Abstract: The research focused on the effects of infill walls on the RC slab-column structural system. In order to accomplish this, the elastic-plastic time-history analysis of RC slab-column structure was performed. Based on the test results of a full-scale three-story RC structure repaired and strength with masonry infill walls, the four optional analysis models were analyzed. The first was the pure RC slab-column structure without infill walls, the second was the RC slab-column structure added with half-height infill walls, which was equivalent to open holes inside infill walls, the third was the RC slab-column structure added with infill walls arranged symmetrically along the plane symmetric axis, and the fourth was the RC slab-column structure added with infill walls arranged around the plane geometry center. Analysis results indicated that addition of infill walls could increase the seismic performance of the structural system, configurations and amounts of infill walls, and the hole positions and sizes inside infill walls had effects on the structural system.