Review on Comparative Study of Diagrid Structure with Conventional Building

IJSTE - International Journal of Science Technology & Engineering | Volume 3 | Issue 09 | March 2017 ISSN (online): 2349-784X

Review on Comparative Study of Diagrid Structure with Conventional Building Harshada A. Naik ME Student Department of Civil Engineering ICOER, Wagholi, Pune

Prof. S. R. Suryawanshi Assistant Professor Department of Civil Engineering ICOER, Wagholi, Pune

Abstract In structural systems, Diagrid structure is a new trend nowadays because of its structural efficiency and architectural aesthetic significance. It is important to study diagrid structures under lateral loads such as wind load or seismic load. This paper presents the literature review of different authors on behavior of diagrid structures under wind loading and seismic loading to understand the performance of diagrid structures. This study gives good indications on parameters in terms of time-period, top-storey displacement, inter-storey drift and storey shear.

Keywords: Diagrid Structure, Seismic loading, STAAD.pro, Wind loading ________________________________________________________________________________________________________ I.

INTRODUCTION

In high rise building as height of structure increases then consideration of lateral load become most important factor. There are many lateral load resisting systems like rigid frame system, shear wall, braced tube system, outrigger system and tubular system.

Nowadays diagrid structural system is widely used in high rise buildings because of its unique geometric configuration. This system is combination of triangulated beams they may be straight or curved and horizontal rings. Diagrid structure itself act as a inclined columns and bracing elements and hence they carry both gravity and lateral loads. The purpose of use of diagrid structure in high rise building is first it increases the stability of a structure due to its triangulated configuration and secondly it provide alternate load path in case of structural failure.

This paper deals with the comparative study of diagrid structure with conventional building subjected to lateral load.

II. LITERATURE REVIEW 1) Giovanni Maria Montuori, Elena Mele, Giuseppe Brandonisio and Antonello De Luca worked on Geometrical Patterns for Diagrid Buildings in which from structural point of view they explore the alternative design strategies.

In their work they studied diagrid structures by comparing the regular patterns with the alternative geometrical configurations. Different Geometrical patterns get by changing the angle of diagonals (VA) and number of diagonals (VD).Eight different diagrid patterns are generated and designed for a 90-storey model building. Three different strategies they used for generating eight diagrid patterns i.e.three patterns of regular diagrid, three patterns of variable angle and two patterns of variable density. SAP 2000 software they used for modeling and analysis.

2) Kyoung Sun Moon Studied Diagrid Structures for Complex-Shaped Tall Buildings.

In his study he present the structural performance and constructability issues of diagrid structures by making use of complex-shaped tall buildings like twisted, tilted and freeform towers. This paper deals with the structural design of diagrids to determine cross sectional area of typical web and flange. At top they considered maximum deflection. SAP 2000 software they used for analysis and design.

3) Khushbu Jani and Paresh V. Patel worked on the Analysis and Design of Diagrid Structural System for High Rise Steel Buildings.

In their study they considered 36 storey diagrid steel building which is dynamic along wind and across wind for analysis and design of structure. Analysis is done by comparing results such as time period, top storey displacement and inter-storey drift. ETABS software is used for modeling and analysis of structure. From study it is observed that peripheral columns carry both lateral and gravity load effectively while internal columns carry only vertical load.

4) Young-Ju Kim,Myeong-Han Kim, In-Yong Jung,Young K.JU and Sang- Dae Kim worked on Experimentally Investigation of the Cyclic Behavior of Nodes in Diagrid Structures.

In their study they examined Lotte Super Tower located in seoul, South Korea for experimental investigation. Two types of specimens i.e. PA type for open-section layout and PB type for box-section layout were chosen to investigate cyclic performance of diagrid nodes. Test results were obtained under lateral loads such as wind load or seismic load and on the basis of test results the cyclic performance of diagrid nodes were discussed by their initial stiffness, strength and welding methods.

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Review on Comparative Study of Diagrid Structure with Conventional Building (IJSTE/ Volume 3 / Issue 09 / 128)

5) Dongkyu Lee,Soomi Shin studied Advanced High Strength Steel Tube Diagrid using TRIZ and Nonlinear Pushover Analysis.

In this study firstly they worked on to resolve the problem relted to concentration of stress at the ends of tube connected to cap plates and then secondly provide TRIZ methodologies which is obtained from study of global patent literature. In this study they present effectiveness of diagrid structure by using nonlinear static pushover analysis.

6) In Yong Jung, Young Ju Kim, Young K. Ju, Sang Dae Kim and Sung Jig Kim studied Experimental Investigation of Webcontinuous Diagrid Nodes under Cyclic Load.

They studied four web-continuous diagrid node specimen under cyclic loading. They discussed seismic performance of web continuous H-section diagrid node in this paper. They introduced web-separated H-section diagrid node to compare behavior of web-continuous and web-separated diagrid nodes. Initial stiffness, strength, welding method and energy dissipation these parameters they selected for testing.

7) Kyoung Sun Moon worked on Stiffness-based Design Methodology for Steel Braced Tube Structure: A Sustainable Approach In this paper for determining preliminary member sizes of braced tube for tall buildings they used a stiffness-based design methodology. They discussed impact of different geometric configurations of the structural members on economic design and recommend for optimal geometries. They also examined the influence of diagonal angle on the structural design of braced tube structure.

8) Maria Annunziata Pignataro, Gabriele Lobaccaro and Giulio Zani worked on Digital and Physical Models for the Validation of Sustainable Design Strategies.

In this paper they introduced and discussed the use of physical and numerical models for the validation of a sustainable tower design, the modeling of the building was developed at different levels, make use of computer numerical control (CNC) techniques. This process of graphical modelling, physical modeling and experimental performance testing allowed researchers to overcome the limitations of the currently available analytical models, showing new fields of application of rapid prototyping and how technical drawing can help sustainable design.

III. CONCLUSION Most of the researchers did analysis on diagrid structure under wind loading. Some of them worked out on structural performance of diagrid nodes and its geometrical patterns. But still there is a lack of study on structural behavior, design criteria and performance of the diagrid structural system. So now it is necessary to find out seismic behavior of diagrid structure and compare its analytical results such as time-period, top- storey displacement, inter storey drift and storey shear with conventional structure.

ACKNOWLEDGMENT I would like to thank first my project guide Prof. S.R.Suryawanshi and also our principle Dr. D.D. Shah for their guidance and invaluable words of advice, support and help given to me to do this review paper. Secondly I would like to thank my parents and friends for their appreciation and belief in me.

REFERENCES Giovanni Maria Montuori 1, Elena Mele 2 Et. Al,(2014),” Geometrical Patterns for Diagrid Buildings: exploring alternative design strategies from structural point of view” [2] Kyoung Sun Moon, (2011),”Diagrid Structures for Complex-Shaped Tall Buildings” [3] Khushbu Jani 1,Paresh V. Patel 2,(2013),”Analysis and Design of Diagrid Structural System for High Rise Steel Buildings” [4] Young-Ju Kim1,Myeong-Han Kim 2 Et. Al,(2011),”Experimental Investigation of the Cyclic Behavior of Nodes in Diagrid Structures” [5] Dongkyu Lee 1,Soomi Shin 2,(2014),”Advanced High Strength Steel Tube Diagrid using TRIZ and Nonlinear Pushover Analysis” [6] K. Moon,” Design and Construction of Steel Diagrid Structures” [7] Kyoung-Sun Moon 1, Jerome J. Connor 2 Et. Al,” Diagrid Structural Systems for Tall Buildings:Characteristics and Methodology for Preliminary Design” [8] Nishith B. Panchal 1, Vinubhai R. Patel 2,” Diagrid Structural System: Strategies To Reduce Lateral Forces on High-Rise Buildings” [9] T. M. Boake,” Diagrid Structures: Innovation and Detailing” [10] In Yong Jung 1 , Young Ju Kim 2 Et. Al,(2014),” Experimental Investigation of Web-Continuous Diagrid Nodes Under Cyclic Load” [11] Earthquake Resistant Design of Structures by M Shrikhande and P Agrawal [12] Comprehensive Design of Steel Structures by B.C.Punmia [1]

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