Behavior Of High-rise Buildings Research Articles

Non-linear Behavior of High Rise Buildings Subjected to Earthquake

Non-linear Behavior of High Rise Buildings Subjected to Earthquake

A Comparative Study of Seismic Behavior of High Rise Building with Diagrid Structure and Conventional RCC Framed Structure

A Comparative Study of Seismic Behavior of High Rise Building with Diagrid Structure and Conventional RCC Framed Structure

Operational Dynamic Response of Burj Khalifa and Reinforced Concrete Buildings for Safety Against Pounding

Random ground motions in horizontal, vertical and arbitrary directions radiate away from the focus or the hypocenter under the surface of the earth during an earthquake. When the earth shakes violently, the buildings, which act as vertical cantilevers, undergo vibrations inducing significant inertial forces. Large uncertainties are associated with the response of the buildings to random lateral forces; thus it is of paramount importance to understand the dynamic structural behavior of high rise buildings. Real world high rise building such as Burj Khalifa has been analyzed by response spectrum analysis with the lumped-mass model. The response of Burj Khalifa is simulated when subjected to ground acceleration motion of different earthquake recordings within a MATLAB framework. The ground motion acceleration databases of the El Centro earthquake in 1940 and Bhuj earthquake in 2001 are taken as inputs for the present analysis with other inputs pertaining to different storey masses, storey-stiffness, number of stories, damping ratios and mode shapes. Furthermore, numerical examples to demonstrate the impact of a safe seismic gap between adjacent buildings to prevent pounding or collision during seismic events are presented. It may be observed that computation and adoption of critical gaps between buildings facilitate the best-optimized use of land and provide safety against the pounding of multi-storey buildings under the effect of earthquake excitations.

Study of the effect of global and local ductility on high - rise RCC building in high seismic zone

Numerous studies have been conducted on high-rise buildings, focusing on various aspects such as construction methods, building materials, and responses to seismic and wind pressures. In this paper, the influence of plan aspect ratio on the behavior of high-rise buildings is examined in detail. According to IS 16700:2017, the plan aspect ratio is limited to 5. However, in this study, the plan aspect ratio has been studied up to 6, and the behavior of high-rise buildings under seismic forces has been investigated. The building model has been constructed in three sets, each with varying heights. Building heights of 10, 20, and 30 stories have been selected for each group of buildings, respectively. For each set, seismic metrics, including ductility, stiffness, and base shear, have been compared, and conclusions have been drawn.

Effect of rotational components of strong ground motions on behavior of high-rise buildings with outrigger and belt-truss system

Effect of rotational components of strong ground motions on behavior of high-rise buildings with outrigger and belt-truss system

Wind Analysis of Tall Building with Vertical Setback for Different Height & Area Ratio

The Tall building is being used as much as possible, to live, to commercial and to make statue. It will be of all the building different shapes, design and Structure. From this point of view any building having different discontinuity in mass, geometry of Structure and stiffness. This discontinuity impart the irregularities in the structure. The collapse of high rise building due to irregularities like in symmetries of mass, stiffness, height ratio and geometry of structure. To keep this needs for a long time, we must find out the permissible irregularities to get the maximum building strength/ building life. For design of tall building we need to consider wind load. So, the effect of vertically irregularities in the wind analysis performance of structure becomes really important. Now we will study about behavior of high rise building with different vertical setback and Area ratio on different models of moment resisting rigid frame structure with optimum location of shear wall. In this scrutinize, G+30 story rigid frame structure is taken with two different aspect ratio 1:4:9 and 1:1.56:2.25 for different set-back position in the structure. The set-back provided in the structure are Setback at 15&25 story, Setback at 15&20 Story, Setback at 10&25 Story, Setback at 10&15 Story, Setback at 5&20 Story and Setback at 5&15 Story. Story drift, Story Displacement, Base shear Result are revaluated. On the basis of this result best structure to be discover.

РАЗРАБОТКА КОНСТРУКТИВНОГО РЕШЕНИЯ ВЕРТИКАЛЬНО АРМИРОВАННОГО ОСНОВАНИЯ ПЛИТНОГО ФУНДАМЕНТА ВЫСОТНОГО ЗДАНИЯ В СЕЙСМИЧЕСКОМ РАЙОНЕ

The article presents the results of a numerical simulation of the behavior of high-rise building on weak clay soils, during which the deformations of different variants of foundations were analyzed. The main variants of foundations were examined: slab, traditional pile-slab construction and pile foundation with an intermediate base. Series of numerical calculations in spatial statement determine the deformability of the "Base" - "Structures of the building"- system revealed a favorable response for the use of the intermediate base between the piles and foundation slab of the building. Variant of pile foundation with an intermediate base (vertical reinforced base of slab foundation) allowed not only reduce the absolute deformation of base of the building, but also reduce the effort in the pile elements compared to the traditional pile-slab foundation. Therefore, it was proposed as the most rational for this building

Seismic Analysis of High-Rise Buildings with Transfer Slabs: State-ofthe- Art-Review

In many high-rise buildings, architectural requirements may result in a variable configuration for the vertical structural elements between the stories of the building. To accommodate such vertical elements’ discontinuity, a “transfer” floor conveying vertical and lateral loads between upper and lower stories must be introduced. A drawback of the transfer floor is the sudden change in the building's lateral stiffness at its level: the structure becomes susceptible to the formation of a soft-storey mechanism under moderate to severe earthquakes. These buildings generally showed conventional elastic behavior for frequent earthquake but suffer extensive crack in the vicinity of transfer floors for rare earthquake. In this paper, a state of the art review is presented on recent publications dealing with the seismic behavior of high rise buildings with transfer floor.

PARAMETRIC STUDY OF FLAT SLAB BUILDING WITH AND WITHOUT SHEAR WALL TO SEISMIC PERFORMANCE

Recently there has been a considerable increase in the number of tall buildings, both residential and commercial, and modern trend is towards taller structures. Flat slab/plate is most widely used systems in reinforced concrete construction in offices, residential and industrial buildings in many parts of the world. This system having advantages that it reduces cost of form work and construction time, easy installation and requires the least story height. The flat plate system, in which columns directly support floor slabs without beams. Shear walls are relatively thin, vertically deep reinforced column used in structure which provide stability to structures from lateral loads like wind, seismic loads. In the present work, the effect of with and without shear wall of flat slab building on the seismic behavior of high rise building with different position of shear wall studied. For that, 15 story model is selected. To study the effect of different location of shear wall on high rise structure, linear dynamic analysis (Response spectrum analysis) in software ETABs is carried out. Seismic parameters like time period, base shear, storey displacement and storey drift are checked out.

EFFECT OF DIFFERENT INFILL MATERIAL ON THE SEISMIC BEHAVIOR OF HIGH RISE BUILDING WITH SOFT STOREY

Many urban multistory buildings in India today have open first storey as an unavoidable feature. This is primarily being adopted to accommodate parking or reception lobbies in the first stories. Also for offices or for any other purpose such as communication hall etc. The construction of reinforced concrete structures with infill wall is a common method of providing shelter to the ever increasing population, where there is seismic activity. In the present work, the effect of different infill materials on the seismic behavior of high rise building with soft stories is studied. For that, G+11 RCC model is selected. Different infill materials like siporex and Laminated glass are used. Different cases considering different location of soft stories are considered for the analysis. To study the effect of different infill material on high rise structure, linear dynamic analysis (Response spectrum analysis) in software ETABs is carried out. Seismic parameters like time period, base shear, storey displacement and storey drift are checked out

Hysteresis Identification of Existing Structures

A method is presented for the identification of dynamic properties such as energy dissipation, permanent deformation and strength deterioration of damaged structures. In this method, the forms of load‐deformation relationships are time variant. Its application to the identification of the inter story hysteretic behavior of high rise buildings is obtained through the use of a lumped mass model. Any errors associated with this identification are dealt with the use of a least squares estimation technique. The proposed method is formulated in detail. It is then applied to identify the inter‐story hysteresis behavior of two one‐tenth scale and 10‐story reinforced concrete structures which were subjected to repeated earthquake loads in the laboratory.