scholarly journals Study on Stability of Tall Buildings Under Earthquake

2013 ◽  
Vol 7 (1) ◽  
pp. 237-241
Author(s):  
Zhang Xiang-Dong ◽  
Fan Shi-Xing ◽  
Wang Pu ◽  
Guan Jian
Keyword(s):  
Lateral Displacement ◽  
Tall Buildings ◽  
Shear Walls ◽  
Horizontal Displacement ◽  
Wall Structure ◽  
Building Site ◽  
Building Height ◽  
High Rise ◽  
Maximum Subsidence

Analysis of the structure characteristics of the high-rise building, through the instrument observation, obtains each observation point’s total of subsidence and maximum subsidence, found no settlement of building site. Using the fi-nite element software for structural modeling, modal analysis shows that the quality of structural system, the stiffness is more evenly distributed the structure of the torsional capacity to meet the requirements. The model input Tianjin wave, analyzes the dynamic characteristics of the model, the results showed that: structure below the middle and lower classes, with the building height decreases, the horizontal displacement of reducing the magnitude of the structure of the middle and upper classes, with the building height increases, the horizontal displacement increases, a lesser extent; frame - shear wall structure, shear walls there are substantial limitations in the bottom of the lateral displacement, compared with the upper structure of the lateral displacement limit capacity.

scholarly journals Optimum Shape and Position of Outrigger System for High Rise Building under Earthquake Loading

2020 ◽  
Vol 9 (3) ◽  
pp. 3268-3275
Keyword(s):  
Large Scale ◽  
Load Condition ◽  
Tall Buildings ◽  
Shear Walls ◽  
Optimum Shape ◽  
Earthquake Loading ◽  
High Rise ◽  
High Rise Building ◽  
Tall Structures ◽  
Earthquake Load

The advancement of high rise building has been increasing on a large scale. In tall structures shear wall often resisted the lateral load induced by wind and earthquake but as the building height increases the stiffness of the structure reduces. To provide sufficient lateral stiffness of the structure implementation of outrigger system between the shear walls and peripheral columns is often used. The aim of this study is to identify the optimum shape of outrigger belt truss in tall buildings under earthquake load condition. A thirty storey with single belt truss, forty five storeys with two belt trusses and sixty storey with three belt trusses structure was investigated with three different shape outrigger belt truss that is X, V and N. The optimum location by providing single belt truss at 10th story, 15th story and at top story in thirty story building is considered in the analysis. From the analysis a comparative study are made with and without variation of shape of outrigger with belt truss with parameters likes storey displacement and storey drift under earthquake loading and get a optimum position of outrigger belt truss for thirty storey building with single belt trusses placing at different locations.

Analysis of Effective Location of Shear Wall for High Rise Building with U – Configuration

2021 ◽  
Vol 23 (2) ◽  
pp. 167-176
Author(s):  
Sekar Mentari ◽  
Rosi Nursani
Keyword(s):  
Lateral Displacement ◽  
Center Of Mass ◽  
Shear Walls ◽  
Shear Wall ◽  
Rotational Axis ◽  
Moment Frame ◽  
Earthquake Loads ◽  
High Rise ◽  
Live Loads ◽  
Special Moment Frame

Indonesia is one of the countries that is prone to earthquakes. In addition to the dead loads, superimposed dead loads, and live loads, the design of buildings in Indonesia must be concerned with earthquake loads. Installing shear walls in the building structure as the Special Moment Frame Dual System is one of a solution to withstand earthquake loads. However, the location of shear walls must be considered, especially in buildings with horizontal irregularities. This study aims to determine the optimum location of the shear walls in a 10-storey building that has U-configuration with dynamic earthquake loads. This research is a numerical simulation ran by modelling the structure with software. To know the effect of the shear wall’s location on a building, several variations of the shear wall configuration with different positions have been conducted. It can be seen the lateral displacement of each floor and the shear force are the response structure to withstand the dynamic earthquake loads. Shear walls that are located close to the center of mass of the building are the optimum variation because the position of the shear wall is the closest to the core area of the building, which is the rotational axis of the building.

Displacement Equations Using Force Method for Frame-Composite Walls under Horizontal Loads

2011 ◽  
Vol 137 ◽  
pp. 106-112
Author(s):  
Cheng Hao Wu ◽  
Meng Guo ◽  
Yuan Jian Zhang
Keyword(s):  
Shear Deformation ◽  
Calculation Method ◽  
Lateral Displacement ◽  
Shear Walls ◽  
High Rise ◽  
Wall Structures ◽  
Calculation Results ◽  
Working Together ◽  
Composite Wall ◽  
Composite Walls

According to the special forms and mechanical behavior of frame-composite walls, displacement calculation method for frame-composite walls under horizontal loads is proposed in this paper. The model of frames and composite walls in parallel is adopted for considering working together of them. Cracking of filling blocks at middle and end elastic stages is taken into account. Based on material and structure mechanics theories, the displacement calculation method of frame-composite walls is derived from that of frame structures. The calculation results of the proposed method agree well with the test results of multi-grid composite wall with edge frame columns reinforced by steel. The displacement calculation method of frame-composite walls is compatible with that of frames and that of RC shear walls. The shear deformation of the frame-composite wall contributes most to the whole deformation. And the lateral displacement curves of middle to high-rise frame-composite wall structures are characterized by flexure-shear deformation. The proposed displacement calculation method for frame-composite wall structures can be used as a reference for structural design

COMPARISON OF SHEAR WALLS AND MOMENT-RESISTING FRAMES IN EARTHQUAKE RESISTING BUILDINGS’ DESIGN

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Ahmad Sheikh Abdallah ◽  
Safwan Chahal
Keyword(s):  
Seismic Response ◽  
Tall Buildings ◽  
Shear Walls ◽  
Shear Wall ◽  
Structural Systems ◽  
Lateral Loads ◽  
Building Height ◽  
Seismic Zones ◽  
Prime Concern ◽  
Moment Resisting

The rapid growth of urban population and limited land space have greatly influenced the development of high-rise structures. Lateral loads have an important effect on the design as the building height increases. In order to resist lateral loads, safety and minimum damage should be the prime concern when designing tall buildings. To meet these requirements, the structure should have adequate lateral strength and lateral stiffness and sufficient ductility. Among the various structural systems, shear wall systems or moment resisting frame systems could be a point of choice for designers. Thus, it is important to review and observe the behavior of these systems under seismic effect. This study compared the seismic response of the above structural systems using a case study application at variable seismic zones (Zone 2B, Lebanon Zone, Zone 3, and Zone 4) and at different building stories (Eight and 12-story building). The seismic response is measured in term of time-period, maximum story displacement, maximum story drift, amount of steel and concrete needed. The outcome of this study portrayed that a shear wall system is more efficient in terms of cost and lateral load resistivity regardless of the building height and in the four seismic zones mentioned before.

Calculation Method of the Horizontal Displacement on the Multi-Grid Composite Wall-Shear Wall Structure

2011 ◽  
Vol 217-218 ◽  
pp. 706-711
Author(s):  
Quan Yuan ◽  
Meng Guo ◽  
Peng Fei Li ◽  
Qian Feng Yao
Keyword(s):  
Shear Deformation ◽  
Calculation Method ◽  
Shear Walls ◽  
Horizontal Displacement ◽  
Shear Wall ◽  
Hybrid Structure ◽  
Wall Structure ◽  
Composite Wall ◽  
Wall Shear ◽  
Composite Walls

The multi-grid composite wall-shear wall structure (the hybrid structure discussed in this paper) is a new dual structural system consisting of the multi-grid composite walls and the RC shear walls. Because of the shear deformation of the composite walls subject to arbitrary loads, it is not accurate to calculate the horizontal displacement of the hybrid structure by using the displacement formulations of the frame-shear wall structure. And therefore, a displacement calculation method for the hybrid structure subjected to horizontal loads should be proposed. In this paper, the composite walls are viewed as shear-flexural type cantilever walls and the shear walls as flexural type cantilever walls. Based on the Timoshenko beam theory, the displacement differential equation of the hybrid structure is proposed by the continuum method. The analytical solutions of the displacement equation for the hybrid structure subject to the inverse triangle load are obtained with boundary conditions. The example indicates that the lateral displacement curve of the hybrid structure from the proposed method exhibits a shear-flexural type characteristic in which the shear deformation should not be ignored.

scholarly journals Investigation responses of the diagrid structural system of high-rise buildings equipped with Tuned mass damper using new dynamic method

2021 ◽  
Vol 1 (2) ◽  
Author(s):  
Arash Karimipour ◽  
Mansour Ghalehnovi ◽  
Mahmoud Edalati ◽  
Mehdi Barani
Keyword(s):  
Dynamic Method ◽  
Lateral Displacement ◽  
Tall Buildings ◽  
Tuned Mass Damper ◽  
Structural System ◽  
Base Shear ◽  
Structural Behaviour ◽  
High Rise ◽  
Mass Damper ◽  
Story Drift

Due to the shortage of land in cities and population growth, the significance of high rise buildings has risen. Controlling lateral displacement of structures under different loading such as an earthquake is an important issue for designers. One of the best systems is the diagrid method which is built with diagonal elements with no columns for manufacturing tall buildings. In this study, the effect of the distribution of the tuned mass damper (TMD) on the structural responses of diagrid tall buildings was investigated using a new dynamic method. So, a diagrid structural systems with variable height with TMDs was solved as an example of structure. The reason for the selection of the diagrid system was the formation of a stiffness matrix for the diagonal and angular elements. Therefore, the effect of TMDs distribution on the story drift, base shear and structural behaviour were studied. The obtained outcomes showed that the TMDs distribution does not significantly affect on improving the behaviour of the diagrid structural system during an earthquake. Furthermore, the new dynamic scheme represented in this study has good performance for analyzing different systems. 

scholarly journals Reducing the Impact of Wind Load with Shape of High Rise Buildings

2020 ◽  
Author(s):  
Nasra Mohammed Nasser Al-Azri ◽  
Sachin Kuckian ◽  
Himanshu Gaur
Keyword(s):  
Architectural Design ◽  
Lateral Displacement ◽  
Tall Buildings ◽  
Wind Load ◽  
Point Of View ◽  
Stability Parameters ◽  
Load Effect ◽  
High Rise ◽  
The Impact ◽  
Stable Shape

Recent Years, Many high rise buildings are being constructed across the world due to the increase in population. From the design point of view, lateral load such as earthquake and wind load should be taken into consideration while designing process. Architectural design of buildings sometimes leads towards difficult and unusual shape that challenges structural designers. The objective of this study is to assess the building behavior when subjected to wind load. To achieve this objective, different shapes of building such as pentagonal, triangular and circular building are assessed for stability. Parameters such as storey drift and lateral displacement are considered in order to find most effective and stable shape. The computer program ETABS is used for analysis. As the height of the building increases, wind load effect becomes significant and should be considered for designing. This could also be achieved by selecting most stable shape and appropriate structural system for tall buildings.

Stability Analysis of High-Rise Buildings under Seismic Load

2012 ◽  
Vol 256-259 ◽  
pp. 2067-2073
Author(s):  
Xiang Dong Zhang ◽  
Pu Wang ◽  
Jian Guan
Keyword(s):  
Lateral Displacement ◽  
Shear Wall ◽  
Frame Structure ◽  
Seismic Load ◽  
Structural System ◽  
Wave Analysis ◽  
Structure Characteristics ◽  
High Rise ◽  
Finite Element Software

Analysis of the structure characteristics of the General Hospital of Fuxin Mining Group, through the instrument observation and use the finite element software for structural modeling, modal analysis show that the quality of structural system, the stiffness is more evenly distributed the structure of the torsional capacity to meet the requirements. Through input into Tianjin wave, analysis the dynamic characteristics of the model, the results show that: to tall wall-frame structure, shear wall is very restriction of lateral displacement in the central and bottom, stronger than upper structure on lateral displacement limit ability.

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)

Study on the Seismic Behavior of Hollow R.C Shear Wall Model Building with and without Seams

2010 ◽  
Vol 163-167 ◽  
pp. 1480-1484
Author(s):  
Gang Wang ◽  
Xiao Hu ◽  
Qiong Mei Wang ◽  
Yong Tao Gao
Keyword(s):  
Seismic Behavior ◽  
Model Building ◽  
Shear Walls ◽  
Shear Wall ◽  
Wall Structure ◽  
Wall Model ◽  
High Rise ◽  
Deformation Feature ◽  
Plastic Stage ◽  
Elastic Stage

Based on the pseudo-dynamic and pseudo-static under low-cycle test of 10-storey model building without seams and 6-storey model building with seams, the change of dynamic characteristics, the failure mechanism, the deformation feature and ductility of two type structures are discussed. The result of experimental study proves that the capacity of hollow shear wall is well; In elastic stage, the hollow shear wall and common shear wall are similar: high stiffness and little deformation; In elastic-plastic stage, the deformation is increasing, and the slit hollow shear wall are divided into several little walls, the property of energy dissipation of hollow shear wall structure is good. The seismic behavior of the slit and integral hollow shear walls are used in the multi-story and low high-rise building.

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