Internal Force Calculation and Analysis of Precast Reinforced Concrete Composite Thermal Insulation of External Wall

2013 ◽  
Vol 405-408 ◽  
pp. 2555-2558
Author(s):  
Ying Wang
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Thermal Insulation ◽  
Internal Force ◽  
Calculation Formula ◽  
External Wall ◽  
Simulation Calculation ◽  
Wall Panels ◽  
Force Calculation

This paper describes how to use the simulation calculation of finite element programs. Identification the internal force calculation formula of whole precast reinforced concrete composite insulation external wall with openings.In engineering on wall panels provide a basis for safe use.

Research on the Nonlinearity Finite Element in the Super-Long Reinforced Concrete Frame Structure

2014 ◽  
Vol 1065-1069 ◽  
pp. 1226-1229
Author(s):  
Yong Sheng Zhang ◽  
Yan Ying Li
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Internal Force ◽  
Frame Structure ◽  
Reinforced Concrete Frame ◽  
Engineering Project ◽  
Element Analysis ◽  
Concrete Frame ◽  
Temperature Load ◽  
Reinforced Concrete Frame Structure

Basing on the finite element analysis software, the emergence of crack under the effect of gradual changed temperature load and the change of stress which are in the condition of super reinforced concrete frame structure are analyzed from the linear and nonlinear numeral simulation. The simulation shows that the structure component under the normal condition is cracked and turn into the nonlinear condition and the steel bars still works under the elastic stage. Meanwhile the actual stage which is reflected by the elastic-plastic analysis of the internal force and deformation is compared by the results which are obtained by the actual project observed results and the calculation of the simplified model. So the distribution of the stress which is caused by the structure temperature reduction is greatly evaluated by the usage of the cracking model which is nonlinear finite element and also plays an important role in the engineering project and practice.

Finite Element Analysis on Negative Wind Pressure Stress of External Wall Insulation Layer

2014 ◽  
Vol 580-583 ◽  
pp. 3030-3033
Author(s):  
You Hui Zhang ◽  
Li Ping He ◽  
Ying Jun Zhang ◽  
Chen Li
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Thermal Insulation ◽  
Wind Pressure ◽  
Insulation Material ◽  
Insulation Layer ◽  
Element Analysis ◽  
External Wall ◽  
Flame Retardation ◽  
Pressure Stress

With excellent flame retardation and thermal insulation properties, SY self-temperature regulation and phase change energy-saving wall insulation material (the material) is composed of concrete and volcano perlite. At present, applied research of this material is not very thorough,especially under the condition of temperature variation, seasonal wind change in North China. In this paper, finite element analysis of external wall insulation layer of the Experimental Teaching Building in Taiyuan University of Science and Technology under negative wind pressure effect is performed. The negative wind load calculated is applied to the surface of the thermal insulation layer as uniform load, and the results show that the material used in the building which shorter than 80 meters in the Taiyuan area has no shedding or destruction under the negative air pressure. This material is safe and available.

Design guidelines and optimization of ultra-high-performance fibre-reinforced concrete blast protection wall panels

2020 ◽  
Vol 11 (4) ◽  
pp. 494-514
Author(s):  
Mohtady Sherif ◽  
Hesham Othman ◽  
Hesham Marzouk ◽  
Hassan Aoude
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
High Performance ◽  
Optimization Techniques ◽  
Blast Load ◽  
Fibre Reinforced Concrete ◽  
Blast Loads ◽  
Finite Element Software ◽  
Wall Panels ◽  
High Performance Fibre

Ultra-high-performance fibre-reinforced concrete is the latest generation of structural concrete, having outstanding fresh and hardened properties; this includes the ease of placement and consolidation with ultra-high mechanical properties, as well as toughness, volume stability, durability, higher flexural and tensile strength, and ductility. As more research is being focused on it, the material behaviour and characteristics are getting more understood, and the research demand for the special applications of the ultra-high-performance fibre-reinforced concrete is growing higher. One special application that ultra-high-performance fibre-reinforced concrete is thought to have an outstanding performance at is in the field of protective structures, specifically against blast loads. This article presents part of a study that is concerned with the behaviour and response of ultra-high-performance fibre-reinforced concrete wall panels under blast load. Size and shape optimization techniques were combined in this study to optimize the design of a 200-MPa ultra-high-performance fibre-reinforced concrete under blast loads using finite element modelling. This design optimization aims to maximize stiffness and minimize the cost while satisfying both design stresses and construction requirements. The design variable to be optimized for are the thickness ranging from 100 to 300 mm at 25 mm increments, in addition to the reinforcement ratio of 0%, 0.2%, 1% and 3%, and aspect ratio of 1, 1.5 and 2; the boundary condition is four edges fixed and restrained. The numerical simulation has been performed using an explicate finite element software package. The complete behaviour of an ultra-high-performance fibre-reinforced concrete is defined using the concrete damaged plasticity model. The concrete constitutive model has been developed considering the contribution of tensile hardening response, fracture energy and crack-band width approaches to accurately represent the tensile behaviour and guarantee mesh independence of results. The blast load is applied using the Conventional Weapons method of the US Army Corps of Engineers that is readily available in the finite element software. The validity of the numerical model used is verified by comparing numerical results to experimental data.

scholarly journals Research and practices of large composite external wall panels for energy saving prefabricated buildings

2019 ◽  
Vol 289 ◽  
pp. 10012
Author(s):  
Yunxing Shi ◽  
Yangang Zhang ◽  
Kun Ni ◽  
Wei Liu ◽  
Ye Luo
Keyword(s):  
Production Process ◽  
Energy Saving ◽  
Thermal Insulation ◽  
Sandwich Panel ◽  
Composite Panel ◽  
Sandwich Composite ◽  
Composite Panels ◽  
Load Bearing ◽  
External Wall ◽  
Wall Panels

The production process and application of large composite external wall panels (composite panels for short) are introduced in this paper. Composite panels with both load bearing and thermal insulation were formed by pouring normal concrete (NC) and ceramsite foamed concrete (CFC) continuously according to particular technological requirements, which made two layers into a seamless whole. The layers of NC and CFC are for load bearing and thermal insulation respectively. The composite panels were manufactured in the scale of industrial production, and applied to several energy saving prefabricated buildings successively, instead of polystyrene sandwich composite panels (sandwich panel for short) as external wall panels. There are several obvious advantages of the composite panel over the sandwich panel or outer benzoic board. Firstly, it solved the problems of durability of polystyrene and the complex production process of the sandwich pane, the production process of the external wall was thus greatly simplified. In addition, the fire risk was much reduced.

The Method Analysis of Using Finite Element Method to Determine the Bemding Moment Formula of Precast Reinforced Concrete Composite Thermal Insulation of External Wall

2012 ◽  
Vol 204-208 ◽  
pp. 3682-3685
Author(s):  
Ying Wang ◽  
Yan E Sui
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Calculation Method ◽  
Engineering Application ◽  
Wall Panel ◽  
External Wall ◽  
Wall Panels ◽  
Sandwich Type ◽  
Method Analysis ◽  
Element Method

This paper describes the calculation method and steps of compound insulation external wall panels who's whole board with openings. Using Finite Element Method to simulate and analysis the result,For in the engineering application of the sandwich type wall panel provides the basis.

Structural Optimization of Reinforced Concrete Aqueduct with Multi-Longitudinal Beams Part II: Application

2011 ◽  
Vol 243-249 ◽  
pp. 323-326
Author(s):  
Jun Feng Guan ◽  
Xiao Ke Li ◽  
Shun Bo Zhao
Keyword(s):  
Finite Element ◽  
Reinforced Concrete ◽  
Optimization Design ◽  
Design Method ◽  
Distribution Patterns ◽  
Internal Force ◽  
Structural Deformation ◽  
Structural Element ◽  
Dead Weight ◽  
Shell Finite Element

Based on a 3-D solid finite element parametric model, an optimization design method of reinforced concrete aqueduct with multi-longitudinal beams is proposed. In this method, the stress of sidewall and subplate is controlled by the sectional crack-resisting criteria, the space between longitudinal beams or crossbeams is decided by the coordination of structural deformation, and the bottom stress of longitudinal beams or crossbeams is restrained by the nominal tensile stress. Taking the lightest dead weight of aqueduct as the objective of optimization, this method is able to give the optimal sizes and distribution patterns of the main load bearing members. The internal force of each structural element of the optimized aqueduct is calculated by a 3-D beam-shell finite element numerical model and thus the reinforcements are arranged. Compared with the prototype, the optimized aqueduct shows the advantages of lighter weight, more reasonable stiffness distribution, coordinated deformation and economical reinforcements.

Numerical Simulation on the Overturn Process of Towering Reinforced Concrete Chimney during Directional Demolition Blasting

2013 ◽  
Vol 444-445 ◽  
pp. 1145-1151
Author(s):  
Jian Bin Xie ◽  
Miao Fu ◽  
Chang Chang Wu ◽  
Deng Feng Hu ◽  
Yun He Du
Keyword(s):  
Numerical Simulation ◽  
Finite Element ◽  
Reinforced Concrete ◽  
Finite Element Model ◽  
Constitutive Relation ◽  
Element Model ◽  
Internal Force ◽  
Modeling Method ◽  
Element Analysis ◽  
Reinforced Concrete Chimney

On the basis of plastic-elastic mechanics and finite element method, one selected 150m high reinforced concrete chimney was taken as the target in this paper to analyze the mechanical condition of directional demolition blasting, the capsizing time, the internal force of support abutment and constitutive relation of the chimney during directional blasting. A finite element model of the towering reinforced concrete chimney was established through separated modeling method by finite element analysis software LS-DYNA of ANSYS. Results show that the constitutive relation given by this paper conforms to reality. The finite element model of the towering reinforced concrete chimney established by separated modeling method is reasonable. The real overturn process, capsizing location and capsizing length of towering reinforced concrete chimney during directional demolition blasting are agree with that of numerical simulation.

Study on External Wall Panel of Industrialized Housing and Seismic Behavior of Connection Joint

2012 ◽  
Vol 204-208 ◽  
pp. 2394-2398
Author(s):  
Jing Hai Yu ◽  
Gang Zhang ◽  
Jiu Peng Li
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Reinforced Concrete ◽  
Energy Dissipation ◽  
Seismic Behavior ◽  
Rational Design ◽  
Wall Panel ◽  
External Wall ◽  
Strength And Stiffness ◽  
Element Method

The lateral performance of a typical reinforced concrete external wall panel is analyzed by finite element method and the analysis results show that the reinforced concrete external wall panel has a certain strength and stiffness in its own plane. In order to rational use the strength and stiffness of the wall panel, a new type of energy dissipation connector is designed based on passive energy dissipation. The energy dissipation connector is analyzed by finite element method and the analysis results show that this energy dissipation connector has ideal hysteresis curve. The energy dissipation connector can improve the seismic behavior of main structure through rational design.

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