Analysis on the Holistic Resistant Behavior of Super High-Rise Concrete Structure Affected by the Concrete Strength of the Core of the Joints

2015 ◽  
Vol 1091 ◽  
pp. 89-95
Author(s):  
Zhao Yang ◽  
Di Wu
Keyword(s):  
Finite Element ◽  
Concrete Strength ◽  
Element Model ◽  
Construction Process ◽  
Design Requirement ◽  
High Rise ◽  
The Core ◽  
Design Requirements ◽  
Core Concrete ◽  
The Finite Element Model

In the construction process of super high-rise structures, in order to simplify the construction process and ensure the construction quality, the construction team always make the concrete of joint core use the same strength grade with beams and plates, and pouring with them together. So that the concrete strength of joint core fail to meet the design requirement, whether the resistant behavior of the structure can be able to meet the design requirements is the key problem we focus on. In this paper, the finite element model of a super high-rise structure was established by MIDAS/GEN software, the holistic resistant behavior of the structure under the action of frequent earthquake was analyzed to study the effect of joint core concrete strength on the whole structure. The study provides the basis for further exploring a more reasonable pouring method of the concrete of the joints.

Analysis on the Holistic Resistant Behavior of Super High-Rise Structure Affected by the Concrete Strength of the Core of the Joints

2013 ◽  
Vol 631-632 ◽  
pp. 747-753
Author(s):  
Zhao Yang ◽  
Qing Hai Mei
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Concrete Strength ◽  
Element Model ◽  
Construction Process ◽  
High Rise ◽  
The Core ◽  
Design Requirements ◽  
Core Concrete ◽  
The Finite Element Model

There are some disadvantages in the concrete pouring method of column beam joints of super high-rise structures. If the concrete of joint core use the same strength grade with beams and plates, and pouring with them together, the construction process will be simplified and the construction quality will be easier to ensure. But the concrete strength of joint core is reduced, so whether the resistant behavior of the structure can be able to meet the design requirements is the key problem we focus on. The finite element model of a super high-rise structure was established by MIDAS software, the holistic resistant behavior of the structure was analyzed to study the effect of joint core concrete strength on the whole structure. The study provides the basis for further exploring a more reasonable pouring method of the concrete of the joints.

Influence of Concrete Strength of the Core of the Joints on the Holistic Resistant Behavior of Super High-Rise Structure

2013 ◽  
Vol 351-352 ◽  
pp. 396-400 ◽  
Author(s):  
Zhao Yang ◽  
Xiao Yu ◽  
Yang Zhi Zhong
Keyword(s):  
Finite Element ◽  
Concrete Structure ◽  
Concrete Strength ◽  
Core Area ◽  
Finite Element Models ◽  
Construction Process ◽  
Construction Quality ◽  
High Rise ◽  
The Core ◽  
Design Requirements

In the construction process of the super high-rise concrete structure, it’s easy to be happened that the concrete strength of joints can’t meet design requirements. Some finite element models of a super high-rise building were established by MIDAS in the paper, which were used to analyze the influence of concrete strength of the core of the joints on the holistic resistant behavior. The study may provide the basis for solving the construction quality problems of the core area of joints

scholarly journals Numerical analysis of circular and square section concrete filled aluminum tubes under axial compression

2020 ◽  
Vol 14 (54) ◽  
pp. 169-181
Author(s):  
Pan Jinlong ◽  
Li Guanhua ◽  
Jingming Cai
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Axial Compression ◽  
Parametric Analysis ◽  
Concrete Strength ◽  
Fe Model ◽  
Fe Method ◽  
The Core ◽  
Aluminum Tubes ◽  
Core Concrete

In this paper, the finite element (FE) method was used to investigate the axial compressive behaviors of circular and square concrete filled aluminum tubes (CFAT). Firstly, the simulational results were compared with the experimental results and the accuracy of the proposed FE model was verified. On this basis, the FE model was further applied to compare the mechanical properties of both circular and square CFATs under axial compression. It was found that the circular CFATs have a better effect on restraining the core concrete than square CFATs. The parametric analysis was also conducted based on the proposed FE model. It was noticed that the mechanical differences of the two kinds of CFATs gradually decreased with the increase of the aluminum ratio, aluminum strength and concrete strength.

Die Shape Optimal Design in Bimetal Extrusion by the Finite Element Method

1997 ◽  
Vol 119 (2) ◽  
pp. 143-150 ◽  
Author(s):  
S. M. Byon ◽  
S. M. Hwang
Keyword(s):  
Finite Element ◽  
Optimal Design ◽  
Optimization Problem ◽  
Element Model ◽  
The Finite Element Method ◽  
Constrained Optimization Problem ◽  
New Approach ◽  
The Core ◽  
The Finite Element Model

A new approach to die shape optimal design in bimetal extrusion of rods is presented. In this approach, the design problem is formulated as a constrained optimization problem incorporated with the finite element model, and optimization of the die shape is conducted on the basis of the design sensitivities. The approach is applied to the determination of the optimal die shapes for several combinations of the core and sleeve materials.

The Finite Element Analysis of Mining Dump Truck Frame

2014 ◽  
Vol 707 ◽  
pp. 381-385
Author(s):  
Pei Ming Zhang ◽  
Qing Rong Zhang ◽  
Wei Chun Zhang
Keyword(s):  
Finite Element ◽  
Stress Condition ◽  
Element Model ◽  
Dump Truck ◽  
Element Analysis ◽  
The Finite Element Analysis ◽  
Design Requirements ◽  
Mining Dump Truck ◽  
The Finite Element Model ◽  
Ansys Workbench

Mining Dump truck frame is a key part of the vehicle, in this paper the finite element model of the frame was built in UG software, and then the model was imported into ANSYS Workbench. The paper carried on the statics analysis of the frame under the bending and the torsion condition, and carried on modal analysis under a free state. Through the results of analysis, the design requirements such as the stress condition and each order natural frequency of the frame were verified.

Dynamic Characteristics Analysis of Tower Columns of Ship Lift System

2011 ◽  
Vol 94-96 ◽  
pp. 531-534 ◽  
Author(s):  
Hong Wei Ma ◽  
Ji Wei Wang ◽  
Ji Xiang Xu ◽  
Xiao Qiu Ding
Keyword(s):  
Finite Element ◽  
Dynamic Characteristics ◽  
Seismic Waves ◽  
Element Model ◽  
High Rise ◽  
Characteristics Analysis ◽  
Design Requirements ◽  
Ship Lift ◽  
Hydro Project ◽  
Dynamic Characteristics Analysis

Based on the Xiangjiaba Hydro Project, dynamic characteristics of large high-rise structure under El_Centro seismic wave were investigated in this paper. 8-node hexahedral isoparametric elements[1] are used to the solid element in the 3-D finite element model. In order to increase the efficiency of the calculation, the Newmark- [2] method is implemented. By means of seismic waves, the displacement responses of the Xiangjiaba Hydro Project are analyzed in detail. The results, which are obtained for displacement responses of tower columns of ship lift, show that calculated dynamic results of the tower column can meet the design requirements.

scholarly journals Dynamic Characteristics and Time-History Analysis of Hydraulic Climbing Formwork for Seismic Motions

2021 ◽  
Vol 2021 ◽  
pp. 1-17
Author(s):  
Gang Yao ◽  
Haoting Guo ◽  
Yang Yang ◽  
Chengming Xiang ◽  
Soltys Robert
Keyword(s):  
Finite Element ◽  
Time History ◽  
Element Model ◽  
Von Mises Stress ◽  
Guide Rail ◽  
Maximum Displacement ◽  
High Rise ◽  
History Analysis ◽  
Von Mises ◽  
The Finite Element Model

With the widespread use and increasing cycle life of climbing formwork to construct high-rise buildings in earthquake-prone areas, the risk of earthquakes during the construction period increases. Hence, it is necessary to analyze the seismic response of climbing formwork. According to actual climbing formwork in the super high-rise office building of Wanda Plaza in Kunming, China, the finite element model of the climbing formwork is established on the Ansys platform. The correctness of the model is verified by comparing the natural frequencies of the actual climbing formwork and the finite element model. The time-history analysis of the climbing formwork subjected to earthquakes of varying strong magnitudes is carried out. The maximum displacement position and maximum von Mises stress position of the climbing formwork under different working conditions are determined, and the seismic response of the climbing formwork is analyzed. It has been found that when the formwork is under construction, the maximum displacement position of the climbing formwork is at the center of the long beam of the upper platform, and the maximum von Mises stress position is the joint of the outer pole of the main platform and tripod. Under the climbing condition, the maximum displacement position of the climbing formwork is at the top of the outer pole of the upper platform, and the maximum von Mises stress position is the joint of the beam of the tripod and guide rail. The climbing formwork is partially damaged under the simulated earthquake. However, the displacement is large, and some components have reached the yield state. It is recommended to strengthen the connection between the upper platform and the guide rail and enhance the strength and rigidity of the outer pole and tripod. Climbing formwork is more sensitive to horizontal earthquakes and has minimal sensitivity to vertical earthquakes. The structure attached to the climbing formwork will reduce its sensitivity to earthquakes. The research results are of practical significance for seismic design and improvement of climbing formwork.

Numerical Analysis of Two Structural Schemes of the HK-Zhuhai-Macau Immersed Tunnel

2014 ◽  
Vol 580-583 ◽  
pp. 1293-1296
Author(s):  
Ya Jiao Dai ◽  
Meng Jia Zhou ◽  
Yu Fei Kong ◽  
Xiao Dong Liu ◽  
Zhi Gang Zhang
Keyword(s):  
Finite Element ◽  
Numerical Analysis ◽  
Finite Element Model ◽  
Element Model ◽  
Construction Process ◽  
Reinforcing Bars ◽  
Finite Element Software ◽  
Immersed Tunnel ◽  
Calculation Results ◽  
Design Requirements

Two structural schemes of the Hong Kong-Zhuhai-Macau Immersed Tunnel were compared. In Scheme 1, the prestressed reinforcing bars were to be cut off after installation. And in Scheme 2, the prestressed reinforcing bars will be kept there as they were after installation. A finite element model for sections E12~E15 was built by using the finite element software PLAXIS with consideration to the construction process and different loading conditions to analyze both schemes. The calculation results show that they both meet the design requirements.

Redrawing Operation a Star Shape from Cylindrical Shape Using Experimental and FE Analysis

2020 ◽  
Vol 38 (1A) ◽  
pp. 25-32
Author(s):  
Waleed Kh. Jawad ◽  
Ali T. Ikal
Keyword(s):  
Finite Element ◽  
Effective Strain ◽  
Element Model ◽  
Cylindrical Shape ◽  
Element Analysis ◽  
Punch Force ◽  
Maximum Value ◽  
Element Simulation ◽  
Blank Sheet ◽  
The Finite Element Model

The aim of this paper is to design and fabricate a star die and a cylindrical die to produce a star shape by redrawing the cylindrical shape and comparing it to the conventional method of producing a star cup drawn from the circular blank sheet using experimental (EXP) and finite element simulation (FES). The redrawing and drawing process was done to produce a star cup with the dimension of (41.5 × 34.69mm), and (30 mm). The finite element model is performed via mechanical APDL ANSYS18.0 to modulate the redrawing and drawing operation. The results of finite element analysis were compared with the experimental results and it is found that the maximum punch force (39.12KN) recorded with the production of a star shape drawn from the circular blank sheet when comparing the punch force (32.33 KN) recorded when redrawing the cylindrical shape into a star shape. This is due to the exposure of the cup produced drawn from the blank to the highest tensile stress. The highest value of the effective stress (709MPa) and effective strain (0.751) recorded with the star shape drawn from a circular blank sheet. The maximum value of lamination (8.707%) is recorded at the cup curling (the concave area) with the first method compared to the maximum value of lamination (5.822%) recorded at the cup curling (the concave area) with the second method because of this exposure to the highest concentration of stresses. The best distribution of thickness, strains, and stresses when producing a star shape by

Analysis of Hydroelectric Unit’s Upper Bracket Based on Test and FEM

2014 ◽  
Vol 721 ◽  
pp. 131-134
Author(s):  
Mi Mi Xia ◽  
Yong Gang Li
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Element Model ◽  
The Finite Element Method ◽  
Ansys Software ◽  
Element Analysis ◽  
Hydroelectric Unit ◽  
The Finite Element Analysis ◽  
Strain Rosette ◽  
The Finite Element Model

To research the load upper bracket of Francis hydroelectric unit, then established the finite-element model, and analyzed the structure stress of 7 operating condition points with the ANSYS software. By the strain rosette test, acquired the data of stress-strain in the area of stress concentration of the upper bracket. The inaccuracy was considered below 5% by analyzing the contradistinction between the finite-element analysis and the test, and match the engineering precision and the test was reliable. The finite-element method could be used to judge the stress of the upper bracket, and it could provide reference for the Structural optimization and improvement too.

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