scholarly journals Experimental and Finite Element Research of Laterally Loaded Pile

2019 ◽  
Vol 8 (6S4) ◽  
pp. 858-863
Keyword(s):  
Transmission Lines ◽  
Tall Buildings ◽  
Offshore Structures ◽  
Lateral Loads ◽  
Engineering Structures ◽  
High Rise ◽  
Lateral Forces ◽  
Bridge Structures ◽  
Port Structures ◽  
Laterally Loaded

Piles have been widely used for supporting axial and lateral loads for a variety of civil engineering structures such as high rise buildings, transmission lines, bridge piers and port structures. In many cases, lateral loads govern the design of piles. Piles are commonly used to support bridge structures, tall buildings, transmission line towers etc. where poor subsoil conditions are encountered. To suit the various types of structures and their loading conditions, piles of different types, shapes and sizes are being used in practice, the safety of these structures mainly depends on the ability of supporting piles to resist large amount of lateral forces. These lateral forces may be due to the action of wind in case of onshore structures and due to combination of wind and wave action in case of offshore structures. In case of coastal structures, there are additional berthing forces.

scholarly journals Study on Behaviour of Outrigger System on High Rise Structure by Varying Outrigger Depth in Seismic Zones of India by Using Staad Pro

2021 ◽  
pp. 420-423
Author(s):  
Mayuri N. Ade ◽  
Prof. G. D. Dhawle ◽  
Prof. M. M. Lohe
Keyword(s):  
Tall Buildings ◽  
Shear Walls ◽  
Tall Building ◽  
Lateral Stiffness ◽  
Lateral Loads ◽  
High Rise ◽  
The Core ◽  
Lateral Forces ◽  
Almost Everywhere ◽  
The World

Tall building development is rapidly growing almost everywhere in the world acquainting new difficulties that need to be met with, through engineering evaluation. In tall buildings, lateral loads generated by earthquake or wind load are frequently resisted by providing coupled shear walls. But as the height increases, the building becomes taller and the efficiency of the tall building greatly depends on lateral stiffness and resistance capacity. So, a system called outrigger is introduced which improves overturning stiffness and strength by connecting shear wall core to outer columns. When the Structure is subjected to Lateral forces, the Outrigger and the columns resist the rotation of the core and thus significantly reduce the lateral deflection and base moment, which would have arisen in a free core. During the last three decades, numerous studies have been carried out on the analysis and behaviour of outrigger structures. But this question is remained that how many outriggers system is needed in tall buildings. (Using Staad-Pro)

scholarly journals Shear-lag effect and its effect on the design of high-rise buildings

2018 ◽  
Vol 33 ◽  
pp. 02001 ◽  
Author(s):  
Bui Thanh Dat ◽  
Alexander Traykov ◽  
Marina Traykova
Keyword(s):  
Major Part ◽  
Tall Buildings ◽  
Lateral Load ◽  
Structural Systems ◽  
Lateral Loads ◽  
Shear Lag ◽  
Shear Lag Effect ◽  
Main Category ◽  
High Rise ◽  
Lag Effect

For super high-rise buildings, the analysis and selection of suitable structural solutions are very important. The structure has not only to carry the gravity loads (self-weight, live load, etc.), but also to resist lateral loads (wind and earthquake loads). As the buildings become taller, the demand on different structural systems dramatically increases. The article considers the division of the structural systems of tall buildings into two main categories - interior structures for which the major part of the lateral load resisting system is located within the interior of the building, and exterior structures for which the major part of the lateral load resisting system is located at the building perimeter. The basic types of each of the main structural categories are described. In particular, the framed tube structures, which belong to the second main category of exterior structures, seem to be very efficient. That type of structure system allows tall buildings resist the lateral loads. However, those tube systems are affected by shear lag effect - a nonlinear distribution of stresses across the sides of the section, which is commonly found in box girders under lateral loads. Based on a numerical example, some general conclusions for the influence of the shear-lag effect on frequencies, periods, distribution and variation of the magnitude of the internal forces in the structure are presented.

scholarly journals A Review on Finned Pile Foundation

2021 ◽  
Author(s):  
S Chandni ◽  
Rekha Ambi
Keyword(s):  
Pile Foundation ◽  
Clayey Soil ◽  
Offshore Structures ◽  
Lateral Loads ◽  
Environmental Loads ◽  
Lateral Capacity ◽  
High Rise ◽  
Power Stations ◽  
Lateral Resistance ◽  
Earth Retaining Structures

Foundation is that part of the structure which supports and transfers the loads from the structure to the soil. Pile foundations are subjected to both axial and lateral loads especially in quay walls, harbour structures, offshore structures, earth-retaining structures, bridges, power stations, lock structures, tall chimneys, and high-rise buildings. Foundations for offshore structures are subjected to environmental loads from waves, currents and wind giving rise to lateral loads that could be up to one third of the vertical loads. In order to enhance the lateral capacity of pile of such structures finned pile can be used. Experimental and numerical analysis of finned pile in sandy and clayey soil is studied by various researches and they concluded that the lateral capacity can be improved compared to that of regular piles. This paper discusses the various parameters of finned pile that influence the lateral capacity of pile foundation. The various parameters discussed are position, number, inclination, shape and dimensions of fin. From the literatures it was found that rectangular fins show better lateral resistance than triangular fins and also as the length and width of the fin increases the lateral capacity of pile also increases in both sandy and clayey soil under lateral loads.

Analytical Study on Effect of Geometry of Tall Buildings on Diagrid Structural Systems Subjected to Lateral Loads

2016 ◽  
Vol 857 ◽  
pp. 47-52
Author(s):  
Elsa Alexander Anjana ◽  
R. Renjith ◽  
Binu M. Issac
Keyword(s):  
Response Spectrum ◽  
Tall Buildings ◽  
Structural Systems ◽  
Lateral Loads ◽  
Structural System ◽  
Structural Efficiency ◽  
High Rise ◽  
Time Period ◽  
Architectural Planning ◽  
And Performance

Structural design of high rise buildings is governed by lateral loads due to wind or earthquake. As the height of building increases, the lateral load resisting system becomes more important than the structural system that resists the gravitational loads. Recently, diagrid structural system are widely used for tall buildings due to its structural efficiency and flexibility in architectural planning. Diagrid structural system is made around the perimeter of building in the form of a triangulated truss system by intersecting the diagonal and horizontal members. Diagonal members in diagrid structural systems can carry gravity loads as well as lateral loads. Lateral loads are resisted by axial action of the diagonals compared to bending of vertical columns in framed tube structure. The structural efficiency of diagrid system also helps in avoiding interior and corner columns, thereby allowing significant flexibility with the floor plan. In this paper, effect of lateral loads on steel diagrid buildings are studied. Square and rectangular buildings of same plan area with diagrid structural system is considered for the study. Diagrid modules extending upto 2,4,6,8 and 12 storeys are evaluated. Static analysis for the gravity loads, wind and earthquake and response spectrum analysis are carried out for these different combinations of plan shape and diagrid modules and performance of all these diagrid models i.e., storey displacement, storey drift and modal time period are evaluated and compared in this study.

The Geometrical Derivation of Formulas for Laterally Loaded Struts

1942 ◽  
Vol 26 (270) ◽  
pp. 119-129 ◽  
Author(s):  
A. J. S. Pippard
Keyword(s):  
Analytical Methods ◽  
Frequent Occurrence ◽  
Lateral Loads ◽  
Polar Diagram ◽  
Engineering Structures ◽  
Axial Thrust ◽  
Usual Approach ◽  
Method Of Solution ◽  
Laterally Loaded

A problem of frequent occurrence in the analysis of engineering structures is the determination of the resultant actions in a uniform bar which is subjected simultaneously to an axial thrust and to lateral loads and terminal couples. This type of problem can be solved by straightforward analytical methods, and well-known formulas for certain cases of loading have been obtained by this means. An alternative method of solution is, however, available by the use of a polar diagram originally due to Ratzersdorfer but discovered independently by H. B. Howard and introduced by him to British engineers. This method is of great, value in obtaining graphical solutions in numerical cases and has been used very widely in drawing offices for this purpose. In addition to its use for the solution of specific problems, however, it offers an attractive method of deducing general formulas and is likely to appeal to the imagination of many students far more than the usual approach. This application of the diagram does not appear to have received the attention that it deserves and the object of this paper is to show its value to the teacher.

scholarly journals Dynamic Seismic Analysis and Design of R.C.C Multi Purpose Building (G+15) By using E-Tabs

2021 ◽  
Vol 10 (10) ◽  
pp. 84-91
Author(s):  
T.G.N.C. Vamsi Krishna ◽  
◽  
V. Amani ◽  
P.S. Sunil Kumar* ◽  
CH. Naveen Kumar ◽  
...  
Keyword(s):  
Seismic Analysis ◽  
Response Spectrum ◽  
Construction Materials ◽  
Tall Buildings ◽  
Poor Quality ◽  
Lateral Loads ◽  
Analysis And Design ◽  
Building Model ◽  
High Rise ◽  
Construction Methods

An earthquake is a sudden, rapid shaking of the earth caused by the breaking and shifting of rock beneath the earth’s surface. Earthquakes are among the most powerful events on earth, and their results can be terrifying. In0general for0design of tall0buildings both0wind as well0as earthquake0loads need0to be0considered. Governing0criteria for0carrying out0dynamic analyses0for earthquake0loads are different0from wind0loads. However many tall buildings are not so resistant in lateral loads due to earthquake. Reinforced concrete multi-storied buildings in India were for the first time subjected to a strong ground motion shaking in Bhuj earthquake. It has been concluded that the principal reasons of failure may be attributed to soft stories, floating columns, mass irregularities, poor quality of construction materials faulty construction methods, unstable earthquake response, soil and infrastructure, which were determined to cause damage to the attached structure. High-rise buildings are in high demand due to global urbanization and population growth, and high-rise buildings are likely to suffer the most damage from earthquakes. Since earthquake forces are irregular and unnatural in nature, engineering tools need to be sharpened to analyze the structure in the work of these forces. In this study, to understand the behaviour of structure located in seismic zones III for G+15 Multi-Purpose storey building model is considered for study. Performance of frame is studied through Response Spectrum analysis and comparison is made on shear force, storey drift, storey displacement and storey stiffness.

scholarly journals ANALYSIS OF MAXIMUM DEFORMATION OF HIGH RISE BUILDINGS WITH OUTRIGGER SYSTEM AGAINST WIND LOAD

2020 ◽  
Vol 6 (2) ◽  
pp. 141-149
Author(s):  
Fadli Kurnia ◽  
Resti Nur Arini ◽  
Dwi Ariyani ◽  
Soni
Keyword(s):  
Tall Buildings ◽  
Wind Load ◽  
Wind Loads ◽  
Structural Systems ◽  
Maximum Deflection ◽  
Lateral Loads ◽  
Optimum Location ◽  
Maximum Deformation ◽  
High Rise ◽  
Story Drift

Outrigger structural systems are quite effective using the lateral loads on tall buildings, one of the main benefits of utilization outrigger is that it can reduce deformation and the danger of inter-story drift caused by lateral loads acting on the building. In this case, wind loads will be viewed as a lateral load because the wind load acting on tall buildings can also cause deformation of the building. The implementation of the outrigger system is viewed from different positions to see the deformation that occurs and the placement of the maximum location. The results of the analysis of wind loads reviewed on these buildings have proven that the use of outriggers in buildings can reduce displacement by 19.58%, and inter-storey drifts by 13.24%, which is applied in a position of ½ of the building height. The optimum location of the outrigger installation can also be determined by calculating the analysis of the maximum deflection that occurs on the 40th floor.

scholarly journals Technological Advances and Trends in Modern High-Rise Buildings

Buildings ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 193 ◽  
Author(s):  
Jerzy Szolomicki ◽  
Hanna Golasz-Szolomicka
Keyword(s):  
Construction Materials ◽  
Scientific Progress ◽  
Tall Buildings ◽  
Technological Evolution ◽  
Engineering Structures ◽  
High Rise ◽  
Technological Advances ◽  
Technological Developments ◽  
Efficient Construction ◽  
Geometrical Form

The purpose of this paper is to provide structural and architectural technological solutions applied in the construction of high-rise buildings, and present the possibilities of technological evolution in this field. Tall buildings always have relied on technological innovations in engineering and scientific progress. New technological developments have been continuously taking place in the world. It is closely linked to the search for efficient construction materials that enable buildings to be constructed higher, faster and safer. This paper presents a survey of the main technological advancements on the example of selected tall buildings erected in the last decade, with an emphasis on geometrical form, the structural system, sophisticated damping systems, sustainability, etc. The famous architectural studios (e.g., for Skidmore, Owings and Merill, Nikhen Sekkei, RMJM, Atkins and WOHA) that specialize, among others, in the designing of skyscrapers have played a major role in the development of technological ideas and architectural forms for such extraordinary engineering structures. Among their completed projects, there are examples of high-rise buildings that set a precedent for future development.

scholarly journals SEISMIC ANALYSIS OF DIAGRID STEEL STRUCTURES FOR MULTISTOREY BUILDINGS.

2020 ◽  
Vol 9 (7) ◽  
pp. 37-44
Keyword(s):  
Seismic Analysis ◽  
Tall Buildings ◽  
Steel Structures ◽  
Construction Technology ◽  
Structural Members ◽  
Lateral Loads ◽  
Structural System ◽  
Exterior Surface ◽  
Analysis And Design ◽  
High Rise

Advances in construction technology, materials, structural systems and analytical methods for analysis and design facilitated the growth of high rise buildings. Structural design of high rise buildings is governed by lateral loads due to wind or earthquake. Lateral load resistance of structure is provided by interior structural system or exterior structural system. It is very important that the selected structural system is such that the structural elements are utilized effectively while satisfying design requirements. Recently diagrid structural system is adopted in tall buildings due to its structural efficiency and flexibility in architectural planning. diagrid structure consists of inclined columns on the exterior surface of building. Due to inclined columns lateral loads are resisted by axial action of the diagonal. lateral shear can be carried by the diagonals on the periphery of building. Analysis and design of 30 story diagrid steel building is presented. A regular floor plan of 36 m × 36m size is considered. ETABS software is used for modeling and analysis of structural members. All structural members are designed as per IS 800:2007 considering all load combinations. Earthquake is considered for analysis of the structure. Load distribution in diagrid system is also studied for 36 storey building. Similarly, analysis for the different diagrid pattern is carried out. Comparison of analysis results in terms of time period, top storey displacement and storey drift is presented in this paper.

scholarly journals Analisis Pengaruh P-Delta Effect Terhadap Perbedaan Ketinggian Struktur Gedung Tahan Gempa (Studi Kasus : Non-Highrise Building)

2020 ◽  
Vol 14 (3) ◽  
pp. 218-226
Author(s):  
Heri Istiono ◽  
◽  
Azhar Yusuf Ramadhan ◽  
Keyword(s):  
Tall Buildings ◽  
Building Structure ◽  
Lateral Loads ◽  
High Rise ◽  
Earthquake Resistant ◽  
Prone Area

The need for earthquake resistant buildings in Indonesia is something that needs to be considered. Considering that Indonesia is an earthquake prone area. A building structure must be designed to be able to withstand lateral loads such as earthquakes within the limits set by the code/standards. For conservative reasons analysis of the P-Delta Effect needs to be considered because the building development ratio will always increase every time. according to SNI 1726-2019 the P-Delta effect is only required for the design of tall buildings. In this case, the P-Delta effect will be calculated in the modeling of non-high-rise buildings and get the results that P-Delta Effect increased story forces: moment of the building under 10%.

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