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

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.

Materials Aging Degradation of Reactor Vessel Internals: Part III—Structural Evaluation and Local Finite Element Models

2009 ◽  
Author(s):  
Matthew D. Snyder ◽  
Tama´s R. Liszkai ◽  
Anne Demma
Keyword(s):  
Finite Element ◽  
Structural Analysis ◽  
Constitutive Model ◽  
Reactor Vessel ◽  
Finite Element Models ◽  
Local Models ◽  
Bolted Connections ◽  
The Core ◽  
Potential Failure ◽  
Reactor Internals

Pressurized water reactor (PWR) internals components can experience material aging and degradation due to irradiation. The purpose of the functionality analysis is to provide a best-estimate evaluation of the reactor internals core barrel assembly for materials degradation to see if the components retain their function. The evaluation uses an irradiated material-specific constitutive model for use in a finite element analysis [1] representing the current state of knowledge for plasticity, creep, stress relaxation, void swelling, and embrittlement. This constitutive model is a function of temperature and fluence. The analysis focuses on finding the integrated effects of material aging combined with steady-state operational characteristics of the reactor internals. In order to evaluate the potential failure mechanisms of the core barrel assembly, finite element models were developed capable of representing the complex interactions between the components. The goal of this specific analysis is to characterize the potential failure modes, spatial and chronological distribution of potential component failures for a representative model of the Babcock & Wilcox-type (B&W) designed plants. Evaluation of the reactor vessel internals for materials aging degradation involves three analytical calculations. Radiation calculations of the core provide essential information on radiation dose and heat rates of the internals. The computational fluid dynamics domain (CFD) allows evaluation of the internals temperatures through conjugate heat transfer (CHT) analysis coupled with coolant flow. Detailed structural analysis of the internals components and bolted connections is the third major physics field involved, which facilitates the development of operating stress fields within the internals. Structural analysis was performed as two parts. First, a global structural model of the core barrel assembly was used to represent the interaction of components of the core barrel assembly during 60 years of operation. The global model does not include detail of the areas of stress concentration within bolted connections. Therefore local models of selected bolts were developed. Results of both the global and local models were used as a basis for evaluating age-related effects. The description of the functionality analysis for the B&W designed RV internals is divided into three papers. Part I was presented in PVP-2008 [2] and included a description of the overall methodology with special attention to CFD-CHT evaluations. Part II, to be presented at PVP 2009 [2] describes global structural finite element models. Part III, presented in this paper, presents a description of local models of bolted connections, results, and conclusions.

Analysis of the Impact of Concrete Compressive Strength Reduction in Joint Core Area on Super High-Rise Structures

2013 ◽  
Vol 438-439 ◽  
pp. 690-695
Author(s):  
Xiao Yu ◽  
Na Wu ◽  
Zhao Yang ◽  
Kai Xu
Keyword(s):  
Compressive Strength ◽  
Cross Sections ◽  
Concrete Strength ◽  
Nonlinear Finite Element ◽  
Core Area ◽  
Concrete Compressive Strength ◽  
Element Analysis ◽  
High Rise ◽  
The Impact ◽  
Joint Core Area

t is focused on a super high-rise building structure, of which the concrete compressive strength is reduced in joint core. The whole structure is calculated with program SATWE. Based on this calculation, integral stress analysis by MIDAS when concrete strength is reduced in joint core area and nonlinear finite element analysis by ANSYS on the joints of the worst cross-sections in the whole structure are developed. Thus the adverse effect of reduced concrete strength in joint core area on super high-rise structures is found out.

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.

Simulation of Fall Loading Using a Probabilistic Shape-Based Finite Element Model of Human Femurs

2007 ◽  
Author(s):  
Todd L. Bredbenner ◽  
Daniel P. Nicolella
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Finite Element Models ◽  
Construction Process ◽  
Single Patient ◽  
Complex Morphology ◽  
Biological Structures ◽  
Efficient Construction

The efficient construction of finite element models that accurately represent the complex morphology of biological structures is a major challenge. Typically, the model constructed is a representation of a single patient and, in order to investigate a different individual, the majority of the mesh construction process must be repeated.

scholarly journals Temperature distribution in concrete structure under the action of fire using Ansys software

2019 ◽  
Vol 91 ◽  
pp. 02010 ◽  
Author(s):  
Chuc Nguyen Trong ◽  
Chinh Mai Viet ◽  
Bach Luu Xuan
Keyword(s):  
Finite Element ◽  
Temperature Distribution ◽  
High Temperatures ◽  
Significant Role ◽  
Concrete Structure ◽  
Structural Model ◽  
Reference Data ◽  
Ansys Software ◽  
High Rise ◽  
Fire Activity

In the last few decades, fires caused serious damage in civil engineering, especially in the high-rise building, factories, offices, etc. Usually the structures are built with fireproof materials such as concrete. It is a complex material, and its properties can change dramatically when exposed to high temperatures. This problem requires engineers to study and evaluate the effect of the fire in the structure. This paper studies the effect of the fire on the temperature distribution in concrete structure using Finite Element Ansys software. The results will be used to provide reference data for concrete structures under the action of fire. The research is an intermediate task to convert the fire activity in a structural model into the real impact in calculating model. It plays significant role in calculating structural model for counteracting the action of fire.

Study on Energy Saving of Local Building Material

2014 ◽  
Vol 539 ◽  
pp. 711-715
Author(s):  
Qi Yang ◽  
Mei Yang
Keyword(s):  
Energy Saving ◽  
Residential Buildings ◽  
Residential Building ◽  
Building Energy ◽  
Construction Process ◽  
Construction Quality ◽  
High Rise ◽  
Project Quality ◽  
Building Energy Saving ◽  
Energy Saving Technology

According to the research of city residential building energy conservation planning, design and technology application, this paper considers the influence of climate and energy saving design, determine the corresponding from the city planning, shape, envelope, Using the project management method, studies on the application of design energy-saving construction theory in the high-rise residential buildings and application of building energy saving technology in the architecture. How to strengthen the building energy-saving project quality supervision, to ensure the construction quality and construction process in the use of the premise of indoor thermal environment quality, make the high-rise residential energy-saving to 65% residential building standards; Through the research, the research of can provide technology guidance and decision-making reference for the construction of energy-saving work more extensive development, progress. Application of energy saving technology implementation, architecture in the architecture and how to strengthen the building energy-saving project quality supervision, to ensure the construction quality and construction process in the use of room

Study on the Analysis and Pre-Control Technology of Vertical Deformation in Construction Process of the Super High-Rise Steel-Concrete Composite Structure

2014 ◽  
Vol 578-579 ◽  
pp. 584-588
Author(s):  
Shan Bing Cai ◽  
Jun Yan Liu ◽  
Han Qing Cao
Keyword(s):  
Finite Element ◽  
Composite Structure ◽  
Vertical Deformation ◽  
Construction Process ◽  
Element Analysis ◽  
High Rise ◽  
The Finite Element Analysis ◽  
The Difference ◽  
The City ◽  
Creep And Shrinkage

Puli central mall, with super high-rise steel-concrete composite structure, is one of the landmarks in the city of Jinan. During the construction process, the vertical deformation of the structure is crucial. This paper based on the finite element analysis software Ansys, uses the refined finite element method to numerically model the elastic, creep and shrinkage deformation during the construction process, in order to gain the vertical deformation and the difference of deformation between core and frame. The pre-control methods for reducing vertical deformation are proposed for design and construction based on the modeling results and the relevant theory, beneficial to guide the construction process for this project.

Materials Aging Degradation of Reactor Vessel Internals: Part II—Structural Evaluation and Global Finite Element Models

2009 ◽  
Author(s):  
Tama´s R. Liszkai ◽  
Matthew Snyder ◽  
Anne Demma
Keyword(s):  
Finite Element ◽  
Structural Analysis ◽  
Constitutive Model ◽  
Reactor Vessel ◽  
Finite Element Models ◽  
Local Models ◽  
Bolted Connections ◽  
The Core ◽  
Potential Failure ◽  
Reactor Internals

Pressurized water reactor (PWR) vessel internals components can experience material aging and degradation due to irradiation [1]. The Electric Power Research Institute (EPRI), under sponsorship of the Materials Reliability Program (MRP), developed PWR Internals Inspection and Evaluation (I&E) Guidelines mainly to support license renewal of U.S. plants [2]. The functionality analysis of reactor internals components and assemblies was one of the tools used to develop these guidelines. The purpose of the functionality analysis is to provide a best estimate evaluation of the reactor internals core barrel assembly for materials degradation and to assess whether the components retain their function. The evaluation uses an irradiated material-specific constitutive model for use in a finite element analysis representing the current state of knowledge for plasticity, creep, stress relaxation, void swelling, and embrittlement [3], 4, [5]. This constitutive model is a function of temperature and fluence. The analysis focuses on finding the integrated effects of material aging combined with steady-state operational characteristics of the reactor vessel (RV) internals. In order to evaluate the potential failure mechanisms of the core barrel assembly, finite element models were developed capable of representing the complex interactions between the components. The goal of this specific analysis is to characterize the potential failure modes, spatial and chronological distribution of potential component failures for a representative model of the Babcock & Wilcox (B&W) designed plants. Evaluation of the reactor vessel internals for materials aging degradation involves three analytical calculations. Radiation calculations of the core provide essential information on radiation dose and heat rates, due to gamma-heating, of the RV internals. The computational fluid dynamics domain (CFD) allows the evaluation of the RV internals temperatures through conjugate heat transfer (CHT) analysis coupled with coolant flow. Detailed structural analysis of the RV internals components and bolted connections is the third major analytical calculation, which facilitates the development of operating stress fields within the RV internals. Structural analysis was performed as two parts. First, a global structural model of the core barrel assembly was used to represent the interaction of components of the core barrel assembly during 60 years of operation. The global model does not include detail of the areas of stress concentration within bolted connections, therefore local models of selected bolts were developed. Results of both the global and local models were used as a basis for evaluating age-related effects. The description of the functionality analysis for the B&W designed RV internals is divided into three papers. Part I was presented in PVP-2008 [6] and included a description of the overall methodology with special attention to CFD-CHT evaluations. Part II, detailed in this paper, describes global structural finite element models. Part III, to be also presented at PVP-2009 [7], presents a description of local models of bolted connections, results, and conclusions.

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