An estimate on in‐construction differential settlement of super high‐rise frame core–tube buildings

2020 ◽  
Vol 29 (9) ◽  
Author(s):  
Zheng He ◽  
Yi Lu ◽  
Fengning Liu ◽  
Feng Pan ◽  
Shuaishuai He
Keyword(s):  
Differential Settlement ◽  
Core Tube ◽  
High Rise

Study on the Structural Floor Design of High-Rise Buildings

2012 ◽  
Vol 256-259 ◽  
pp. 1017-1021
Author(s):  
Ling Huang
Keyword(s):  
Thick Plate ◽  
Point Of View ◽  
Core Tube ◽  
High Rise ◽  
High Rise Building ◽  
Architectural Features ◽  
Small Height ◽  
Flat Beam ◽  
Floor System

There is a high-rise building whose main structure is framework - core tube. In order to meet the requirements for architectural features, the distance between the outer frame and the exterior wall of core tube is relatively small, therefore the floor structure program adopts a thick plate and wide flat beam floor system, and part floors of the upper structure adopt a thick plate and dark beam system. As wide flat beams (dark beams) have a small height and cannot form effective support for the floor, special analysis has been made on floors from the security point of view without considering the role of wide flat beams (dark beams). The floor system of this high-rise building has been analyzed and discussed with regard to bearing capacity, deformation, comfort and other aspects.

Research on Design of Inner-Climbing Tower Crane Supporting System

2013 ◽  
Vol 328 ◽  
pp. 338-342
Author(s):  
Chun Xia Zhu ◽  
Sheng Qing Gu ◽  
Jiu Fu Jin
Keyword(s):  
Support System ◽  
Municipal Government ◽  
Outer Wall ◽  
Element Analysis ◽  
Core Tube ◽  
Steel Girder ◽  
Construction Engineering ◽  
High Rise ◽  
Tower Crane ◽  
Layer 4

Safety is essential for tower cranes in construction engineering, as the inner-climbing tower crane is widely used in the construction of high-rise structures, design safety, reliability and support system which can be turnover is an important prerequisite for protecting the safety of construction. By understanding the interrelationships between construction environment of Henglong Plaza Twin Towers in Shenyang city and ZSL2700 tower, the article will analyse the support system for the project. It mainly uses finite element analysis software ANSYS which can create mechanical status of modeling to analyzing the supporting structure. It can guarantee the structures rationality and the security reliability. Project Summary Shenyang municipal government square tower engineering which building height is 350.6m has the underground layer 4 and the ground 70 layer. The office building has used the frame core tube structure system. The outside frame is composed by the square shape section coagulation earth pyramid and the peripheral steel girder. The rectangular core tube was the reinforced concrete, while in the core tube outer wall has established some steel pole. This project adopt two boom tower cranes from Zhongsheng construct machine company (Nanjing).The first number tower crane is ZSL750, which maximum torque is 750tm; the second number tower cranes is ZSL2700. This paper takes the ZSL2700 tower crane as an object, studying this machines stressful condition of attachment system. The ZSL2700 tower cranes most high-torque is 2600tm, pitching arm angle ranges 85-65 .The maximum lifting load is 100t. The biggest hoisting up scope is 55m, which lifting load is 37.6t.When the crane surpasses the permission lifting load or the hoisting up moment of force, PLC can break the power implementation protection automatically. The tower machine need carry on 19 climbs in the construction process. Fig. 1 Two tower crane installation location diagram

Research on the Construction Technology of Composite Floor of Super High-Rise Core Tube Copestone and Steel Composite Wide-Flat Beam of Hollow Steel Tube and its Application

2013 ◽  
Vol 671-674 ◽  
pp. 1970-1974
Author(s):  
Rong Bai ◽  
Chuan Qin Yao ◽  
Xue Bai ◽  
Chao Wang
Keyword(s):  
Steel Tube ◽  
Advanced Technology ◽  
Construction Technology ◽  
Excellent Performance ◽  
Core Tube ◽  
New Town ◽  
High Rise ◽  
Construction Scheme ◽  
Steel Composite ◽  
Flat Beam

Based on the F2-4 project in Zhujiang New Town of Guangzhou, this paper studies the construction scheme, process principle, technology requirement, etc, of super high-rise core tube copestone and the composite floor of steel composite wide-flat beam of hollow steel tube in order to guarantee the advanced technology, reasonable economy, good quality and excellent performance of the construction scheme. This research could lay a good foundation for the construction of the similar projects in the future.

Research on Seismic Performance Objectives of High-Rise Diagrid Tube Structures

2010 ◽  
Vol 163-167 ◽  
pp. 1100-1106
Author(s):  
Jun Teng ◽  
Wei Liang Guo ◽  
Bai Sheng Rong ◽  
Zuo Hua Li ◽  
Zhi Jun Dong
Keyword(s):  
Seismic Performance ◽  
Design Method ◽  
Time History ◽  
Lateral Stiffness ◽  
Related Factors ◽  
Concrete Core ◽  
Core Tube ◽  
Plastic Energy ◽  
High Rise ◽  
History Analysis

Diagrid tube structures have advantages on constructing high-rise buildings for its great lateral stiffness, but its seismic design methodology researches are limited. The two-stage design method in Chinese code is not specific enough for the seismic fortification objectives of this kind of structures. It is necessary to propose some specific seismic performance objectives for the key components. Typical CFST diagrid tube-concrete core tube structures are studied by dynamic elastic-plastic time-history analysis using Perform-3D program. The structure plasticity developing process is summarized and the distribution characteristics of seismic fortification lines between tubes are discussed. The influences of main structure lateral stiffness related factors on the plasticity developing process are researched. The key components of structure lateral stiffness and plastic energy dissipation are studied. The seismic performance objectives of the key components are proposed for the three-level seismic fortification objectives.

Seismic Behavior of Composite High-Rise Buildings with SRC Column, Steel Beam and RC Core Tube

2012 ◽  
Vol 204-208 ◽  
pp. 2590-2594
Author(s):  
Bin Zhao ◽  
Juan He
Keyword(s):  
Reinforced Concrete ◽  
Seismic Behavior ◽  
Shake Table Test ◽  
Scale Model ◽  
Steel Beam ◽  
Shake Table ◽  
Concrete Core ◽  
Core Tube ◽  
High Rise ◽  
High Rise Building

In this research, a reduced scale model of the composite high-rise building with steel reinforced concrete column, steel beam and reinforced concrete core tube was designed and tested by using the shake table test technology. The acceleration and displacement of the model were measured during the tests. The cracking pattern and failure mechanism were illustrated. Above the shake table test, the finite element analysis of the test mode was carried out. The main effort of the numerical analysis was focused on the selection of the nonlinear models. Based on the experiment results and the strategy of considering nonlinear property of the beam-column joint and the short beam of the concrete core wall were proposed. It is proved that the proposed strategy is effective and economical for seismic behavior assessment of such composite high-rise building structure system.

Dynamic Characteristics and Mode Selection of High Tower

2008 ◽  
Vol 33-37 ◽  
pp. 1201-1206
Author(s):  
X.L. Wang ◽  
Hui Liu ◽  
Hai Bo Li
Keyword(s):  
Dynamic Characteristics ◽  
Mode Selection ◽  
Mode Shapes ◽  
Seismic Responses ◽  
Core Tube ◽  
High Rise ◽  
Participation Ratio ◽  
Major Mode ◽  
Modal Mass ◽  
Mass Participation

The dynamic characteristics of a TV tower with 610m in height is actively analyzed by using commercial package ANSYS in this study. The mode selection is carried out by determining the modal mass participation ratio. The observations made based on numerical investigation demonstrate that the natural frequencies of the high rise unsymmetrical tower are substantially close and the modal displacement of the antenna is much larger than that of the major tower. In order to select the major mode shapes, the modal mass participation ratios of the first 30 modes are calculated and at least first 10 mode shapes should be considered when investigating the seismic responses. It is seen that the mode shapes whose vibration directions are paralleled to the short axis of the elliptical core tube are critical to the structural seismic responses. In this direction, the mass participation ratios of the first three mode shapes add up to 0.63, the 10 modes, the sum of whose modal participation ratio is 0.8184, are selected in order. Therefore, at least 10 modes should be involved in the analysis of structural seismic responses.

Seismic Assessment of Out-of-Code High-Rise Building Using Dynamic Nonlinear Analysis

2011 ◽  
Vol 378-379 ◽  
pp. 292-296
Author(s):  
Xue Shu Wu ◽  
Wan Li Xue ◽  
Guo Rui ◽  
Xu Qian Zhao ◽  
Gu Li
Keyword(s):  
Nonlinear Analysis ◽  
Kinematic Hardening ◽  
Nonlinear Dynamic Analysis ◽  
Shear Walls ◽  
Element Model ◽  
Core Tube ◽  
Shell Elements ◽  
High Rise ◽  
The Core ◽  
High Rise Building

Seismic response of a high-rise building under rare earthquake is numerically investigated in the paper. The Height of the building is 266m, which goes beyond the limit of 150m in Chinese standard, so nonlinear analysis should be performed to investigate its elasto-plastic behaviors under severe earthquake excitations. In the finite-element model for analysis, beam-column members of the structure are simulated by beam elements, while the core tube is simulated by shell elements. The concrete damage plasticity model is used for concrete members, while the kinematic hardening rule is defined for steel beam-column members. Four sets of earthquake wave, including 3 sets of strong earthquake records and 1 set of artificial wave, are adopted in the analysis. The analysis results show that, under severe earthquakes, steel frame members and steel truss members in the strengthened floors keep elastic. Severe damages are detected in almost all coupling beams in the core tube, as well as shear-walls near strengthened stories, where lateral stiffness would decrease seriously. Through the investigation, it is also found that the largest story drift is less than the maximum allowable value in the Chinese code for seismic design of buildings. So it is concluded that the high-rise building will not collapse when the place is subjected to severe earthquakes. Besides, some design suggestions are proposed according to nonlinear dynamic analysis in the paper.

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