CHAPTER 3 PRINCIPLES OF THE CONTEMPORARY DIAGRID STRUCTURE

2014 ◽  
pp. 30-47
Keyword(s):  
2021 ◽  
Vol 1197 (1) ◽  
pp. 012049
Author(s):  
Saurabh Babhulkar ◽  
Kuldeep R Dabhekar ◽  
S.S. Sanghai ◽  
Isha P khedikar

Abstract Diagrid framework has arisen as an inventive underlying framework with a stylish view in the plan of tall structures. In this investigation, seismic execution of 15-story diagrid structures with fluctuating points are assessed utilizing reaction range examination Further more in request to assess the impact of diagrid center on conduct of designs. Actually diagrid essential system is gotten in tall constructions on account of its basic usefulness and versatility in plan organizing. Stood out from solidly scattered vertical areas in illustrated chamber, diagrid structure includes skewed sections outwardly surface of building. Because of slanted sections horizontal burdens are opposed by hub activity of the askew contrasted with twisting of vertical segments in customary construction. Plan and development of counterfeit foundation on the lines of biomicking standards require the improvement of exceptionally advance primary framework which has the characteristics of style articulation, underlying effectiveness and above all mathematical adaptability. Diagrid the most recent change of cylindrical constructions, have an ideal mix of the above characteristics. In this paper, the peculiarities of the diagrid its essential lead under stacking and the arrangement and advancement of diagrid centers are portray A context oriented examination of some new diagrid tall constructions, to be explicit the Swiss Re in London, the hearst tower in New York, and the west Guangzhou Tower in china is moreover presented.


As the rate of growth of population is increasing day by day, the requirement of land is increasing for different purposes. To accommodate this increased population, the height of building is increasing thereby subsequently increasing the importance of lateral load resisting system which provide adequate strength against lateral loading arising due to earthquake and wind. In present study various lateral load resisting system have been introduced which can resist the lateral forces and safely transfer them to soil thereby improving the strength and stiffness of column structures. The lateral load resisting systems that are widely used are conventional beam column system, shear wall system, tube system, outrigger system, tubular system etc. Diagrid structural system is generally adopted in tall buildings due to its structural efficiency and flexibility in planning. Compared to closely space vertical columns in Conventional Beam column system, diagrid structure consists of inclined columns on the exterior surface of building. The concrete diagrids member is used in both precast and cast in-situ type. An exhaustive study has been performed on the performance of 20 storey RCC building with plan size 18 m × 18 m using E-TAB software. All structural members are designed as per IS 456:2000 and all the load combinations of seismic forces are considered as per IS 1893(Part 1): 2002. Finally, Parameter such as storey displacement, storey stiffness and time period are compared and obtained results were presented in both graphically and tabular format


Author(s):  
Yasser Salem ◽  
Devindar Aulakh ◽  
Giuseppe Lomiento

The diagrid structure system has recently gained popularity as an effective structural system for high rise buildings. The effectiveness of the system relies on the truss action developed by the perimeter diagrid system to resist lateral loads. In active seismic zones, ductile performance of the lateral resisting system is highly desired to dissipate energy developed in the structure from the ground shaking. In this study, the seismic performance of the diagrid system is investigated. Non-linear static pushover analysis followed by non-linear dynamic analysis were conducted to study the inelastic behaviour of diagrid systems. Through methods of analysis, the response modification factor of the modelled system was calculated. The results indicate that the reserve strength of a diagrid system is comparable to and often greater than that of many other lateral structure systems, such as steel special truss moment resisting frames and other structural systems as prescribed by the ASCE 7-10.


2021 ◽  
Vol 6 (3) ◽  
Author(s):  
A. Vimala ◽  
A. Vimala

Urbanization and population explosion in the present times has led to increase in demand for land and residencies but the availability of land is scare i.e reason a trend has evolved for construction of high rise structures in high rise structures major emphasis given to lateral load resisting systems. As diagrid structural system is lighter, stiffer and is effective in resisting the lateral loads, the present investigation carried out to study the performance diagrid on high rise structures varying aspect ratio. The study is carried out to observe the performance of diagrid structures ranging from 30 to 90 storeys. Diagrid structures are modelled with 3 storey module and performance of 7 models with different storeys i.e 30, 40, 50, 60, 70, 80, 90 (aspect ratio 3.67-10.86) and with fixed plan area. As a part 1 investigation to optimise the diagrid angle a 30 storey Diagrid structure performance is studied with 4 different diagrid angles one storey module angle 35°45’, Two storey module angle 55°13’, Three storey module 65°9’, Four storey module 70°51’. The optimized diagrid angle is used for different aspect ratio high rise structures to investigate the performance in terms of Storey displacement, Storey drift ratio, base shear and time period. For all the models plan area is fixed. Second part of investigation was a numerical study carried out by utilizing identified optimum angle of diagrid is applied on high rise buildings with aspect ratios 3.67, 4.86, 6.06, 7.26, 8.46, 9.67, 10.86 (Aspect ratio is the total height of the building to the width of the building). Behaviour of the Diagrid buildings due to change in aspect ratio is analysed based on parameters such as Storey displacements, Storey drift ratio, Base shear, Time period. As a part of investigation parameters such as Storey displacements and storey drift ratio were evaluated if they were within the limits as per IS code provisions. Percentage increase in storey displacements, maximum storey drift ratio,


Sign in / Sign up

Export Citation Format

Share Document