Experimental Verification of Subtle Frame Components Prototypes from High Performance Concrete for Energy Efficient Buildings

2016 ◽  
Vol 249 ◽  
pp. 301-306
Author(s):  
Ctislav Fiala ◽  
Jaroslav Hejl ◽  
Vlastimil Bílek ◽  
Jan Růžička ◽  
Tomáš Vlach ◽  
...  
Keyword(s):  
Cross Sections ◽  
Experimental Verification ◽  
High Performance ◽  
Energy Savings ◽  
High Performance Concrete ◽  
Building Envelope ◽  
Bending Test ◽  
Structural Elements ◽  
Load Bearing ◽  
Energy Efficient Buildings

Mechanical properties of high performance concrete (HPC) enable design of subtle structural elements. Subtle HPC frame concept comes from the effort to integrate load bearing elements into building envelope in order to reduce risks of thermal bridges. Substantial advantages of subtle structural elements are material and energy savings during production, transportation, manipulation and assembling. Paper presents preparation and implementation of construction of experimental frame at University Centre UCEEB in Buštěhrad. Individual structural elements were made in prefa plant ŽPSV a.s. in Litice nad Orlicí. Construction of frame prototype is the result of long term research when the vertical and horizontal structural elements and their connections were successively designed and experimentally verified. This article shows experimental results of horizontal load bearing structures - floor panels and beams - in detail. Samples were tested by four-point bending test and also creep of floor panels was measured. Accomplished calculations, experimental verification and analysis have showed that subtle HPC frame is the effective solution from reliability aspects as well as from environmental and economical parameters. Minimal columns cross sections enable their complete implementation into building envelope and they also contribute to high quality architectonic solution of buildings interiors.

Structural Design and Experimental Verification of Precast Columns from High Performance Concrete

2015 ◽  
Vol 1106 ◽  
pp. 110-113 ◽  
Author(s):  
Ctislav Fiala ◽  
Jaroslav Hejl ◽  
Vladimira Tomalova ◽  
Vlastimil Bilek ◽  
Tereza Pavlu ◽  
...  
Keyword(s):  
Reinforced Concrete ◽  
Experimental Verification ◽  
High Performance ◽  
Energy Savings ◽  
High Performance Concrete ◽  
Concrete Columns ◽  
Building Envelope ◽  
Structural Elements ◽  
Reinforced Concrete Columns ◽  
Common Solution

Paper presents some results of long-term research of a new optimized subtle precast construction system based on high performance silicate composites. The system is particularly aimed for building construction in passive or zero-energy standard. Subtle structural elements from high performance concrete (HPC) can be integrated into building envelope of energy efficient buildings with significant reduction of envelope structure and avoiding risk of thermal bridges. Significant advantages of subtle elements are material and energy savings during production, transport, manipulation and construction on building site.Paper presents experimental verification of connection between columns and beams ensured by Peikko ́s PCs corbels. Moreover, production of two prototypes of high performance fibre reinforced columns over two floors is presented. Prototypes were casted in ŽPSV a.s. plant, Litice nad Orlicí in June 2014. Complex LCA analysis of three various reinforced concrete columns was performed. Analysis covers construction life phase. Consequently, environmental impacts of assessed variants were compared and evaluated. Results show that it is possible to reduce some impacts on the environment from 16 up to 65% in comparison with common solution of reinforced concrete columns due to the utilization of excellent mechanical properties of high performance concrete that enables the design of subtle structural elements.

Construction and Static Loading Tests of Experimental Subtle Frame from High Performance Concrete for Energy Efficient Buildings

2017 ◽  
Vol 259 ◽  
pp. 275-279 ◽  
Author(s):  
Ctislav Fiala ◽  
Jaroslav Hejl ◽  
Vlastimil Bílek ◽  
Tomáš Vlach ◽  
Michal Ženíšek ◽  
...  
Keyword(s):  
Static Loading ◽  
High Performance ◽  
Energy Savings ◽  
High Performance Concrete ◽  
Building Envelope ◽  
Structural Elements ◽  
Loading Test ◽  
Energy Efficient Buildings ◽  
Static Loading Test ◽  
Loading Tests

Mechanical properties of high performance concrete (HPC) enable design of subtle structural elements. Subtle HPC frame concept comes from the effort to integrate load bearing elements into building envelope in order to reduce risks of thermal bridges. Substantial advantages of subtle structural elements are material and energy savings during production, transportation, manipulation and assembling. Paper presents implementation of construction of experimental frame at University Centre UCEEB in Buštěhrad. Individual structural elements were made in prefa plant ŽPSV a.s. in Litice nad Orlicí and Čerčany, the company also assembled the experimental frame. The frame was built from February to April 2016. Within June and July, the construction was tested by static loading test, which partial results are presented in the paper. Accomplished calculations, experimental verification and analysis show that subtle HPC frame is the effective solution from reliability aspects as well as from environmental and economical parameters.

Construction of the First Footbridge Made of UHPC in the Czech Republic

2015 ◽  
Vol 1106 ◽  
pp. 8-13 ◽  
Author(s):  
Petr Koukolík ◽  
Jan L. Vítek ◽  
Robert Brož ◽  
Robert Coufal ◽  
Milan Kalný ◽  
...  
Keyword(s):  
Czech Republic ◽  
Experimental Verification ◽  
High Performance ◽  
High Performance Concrete ◽  
Structural Elements ◽  
Ultra High Performance Concrete ◽  
The Czech Republic ◽  
Material Parameters ◽  
Load Carrying ◽  
Utility Vehicle

Footbridge over the Labe River in Celakovice is a cable stayed structure with the main span 156 m long. It is designed for pedestrians, cyclists and also a light utility vehicle may pass over the footbridge. Until now, the footbridge has a record span of the cable stayed structure in the Czech Republic. The ultra high performance concrete (UHPC) was first applied for the load carrying structure on the footbridge at the Czech Republic. The pylons are made of steel and the stays are made of locked coil strands. Since no obligatory codes were available for the design of structures made of UHPC, the extensive experimental verification of material parameters and structural elements was necessary.

scholarly journals Evaluation of a High-Performance Solar Home in Loveland, Colorado

2006 ◽  
Vol 129 (2) ◽  
pp. 226-234
Author(s):  
Robert Hendron ◽  
Mark Eastment ◽  
Ed Hancock ◽  
Greg Barker ◽  
Paul Reeves
Keyword(s):  
High Performance ◽  
Energy Savings ◽  
High Efficiency ◽  
Building Envelope ◽  
Operating Conditions ◽  
Hot Water ◽  
Space Heating ◽  
Solar Water Heater ◽  
Water Heater ◽  
Solar Water

Building America (BA) partner McStain Neighborhoods built the Discovery House in Loveland, CO, with an extensive package of energy-efficient features, including a high-performance envelope, efficient mechanical systems, a solar water heater integrated with the space-heating system, a heat-recovery ventilator (HRV), and ENERGY STAR appliances. The National Renewable Energy Laboratory (NREL) and Building Science Consortium conducted short-term field-testing and building energy simulations to evaluate the performance of the house. These evaluations are utilized by BA to improve future prototype designs and to identify critical research needs. The Discovery House building envelope and ducts were very tight under normal operating conditions. The HRV provided fresh air at a rate of about 35L∕s(75cfm), consistent with the recommendations of ASHRAE Standard 62.2. The solar hot water system is expected to meet the bulk of the domestic hot water (DHW) load (>83%), but only about 12% of the space-heating load. DOE-2.2 simulations predict whole-house source energy savings of 54% compared to the BA Benchmark (Hendron, R., 2005 NREL Report No. 37529, NREL, Golden, CO). The largest contributors to energy savings beyond McStain’s standard practice are the solar water heater, HRV, improved air distribution, high-efficiency boiler, and compact fluorescent lighting package.

scholarly journals Evaluation of a High-Performance Solar Home in Loveland, Colorado

Solar Energy ◽  
2005 ◽  
Author(s):  
Robert Hendron ◽  
Mark Eastment ◽  
Ed Hancock ◽  
Greg Barker ◽  
Paul Reeves
Keyword(s):  
High Performance ◽  
Energy Savings ◽  
High Efficiency ◽  
Building Envelope ◽  
Operating Conditions ◽  
Hot Water ◽  
Space Heating ◽  
Solar Water Heater ◽  
Water Heater ◽  
Solar Water

Building America (BA) partner McStain Neighborhoods built the Discovery House in Loveland, Colorado, with an extensive package of energy-efficient features, including a high-performance envelope, efficient mechanical systems, a solar water heater integrated with the space-heating system, a heat-recovery ventilator (HRV), and ENERGY STAR™ appliances. The National Renewable Energy Laboratory (NREL) and Building Science Consortium (BSC) conducted short-term field-testing and building energy simulations to evaluate the performance of the house. These evaluations are utilized by BA to improve future prototype designs and to identify critical research needs. The Discovery House building envelope and ducts were very tight under normal operating conditions. The HRV provided fresh air at a rate of about 75 cfm (35 l/s), consistent with the recommendations of ASHRAE Standard 62.2. The solar hot water system is expected to meet the bulk of the domestic hot water (DHW) load (>83%), but only about 12% of the space-heating load. DOE-2.2 simulations predict whole-house source energy savings of 54% compared to the BA Benchmark [1]. The largest contributors to energy savings beyond McStain’s standard practice are the solar water heater, HRV, improved air distribution, high-efficiency boiler, and compact fluorescent lighting package.

Material and Structural Properties for Creating High Performance Concrete Structures

2014 ◽  
Vol 629-630 ◽  
pp. 21-27
Author(s):  
György L. Balázs
Keyword(s):  
Structural Properties ◽  
Material Properties ◽  
High Performance ◽  
High Performance Concrete ◽  
Concrete Structures ◽  
Structural Elements ◽  
Design Rules ◽  
Existing Structures ◽  
New Codes ◽  
Specific Material

HPC and UHPC concretes are finding their ways both to new structures and to retrofitting of existing structures. Herein specific material properties as well as structural examples are discussed. New Codes and Recommendations provide description of material properties and design rules for HPC/UHPC structures and structural elements.

Effects of Fly Ash Particle Sizes on the Compressive Strength and Fracture Toughness of High Performance Concrete

2011 ◽  
Vol 284-286 ◽  
pp. 984-988
Author(s):  
An Shun Cheng ◽  
Yue Lin Huang ◽  
Chung Ho Huang ◽  
Tsong Yen
Keyword(s):  
Fracture Toughness ◽  
Particle Size ◽  
Compressive Strength ◽  
Fly Ash ◽  
High Performance ◽  
High Performance Concrete ◽  
Concrete Strength ◽  
Bending Test ◽  
Strength Development ◽  
Particle Sizes

The study aims to research the effect of the particle size of fly ash on the compressive strength and fracture toughness of high performance concrete (HPC). In all HPC mixtures, the water-to-binder ratio selected is 0.35; the cement replacement ratios includes 0%, 10% and 20%; the particle sizes of fly ash have three types of passing through sieves No. 175, No. 250 and No. 325. Three-point-bending test was adopted to measure the load-deflection relations and the maximum loads to determine the fracture energy (GF) and the critical stress intensity factor (KSIC). Test results show that adding fly ash in HPC apparently enhances the late age strengths of HPC either for replacement ratio of 10% or 20%, in which the concrete with 10% fly ash shows the higher effect. In addition, the smaller the particle size is the better the late age concrete strength will be. The HPC with the finer fly ash can have higher strength development and the values of GF and KSIC due to the facts of better filling effect and pozzolanic reaction. At late age, the GF and KSIC values of concrete with 10% fly ash are all higher than those with 20% fly ash.

Comparison of Different Methods for Determination of Modulus of Elasticity of Composite Reinforcement Produced from Roving

2014 ◽  
Vol 1054 ◽  
pp. 104-109 ◽  
Author(s):  
Tomáš Vlach ◽  
Lenka Laiblová ◽  
Alexandru Chira ◽  
Magdaléna Novotná ◽  
Ctislav Fiala ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
High Performance ◽  
High Performance Concrete ◽  
Traditional Approach ◽  
Tensile Modulus ◽  
Bending Test ◽  
Thin Structures ◽  
Technical Textiles ◽  
Composite Reinforcement

Currently, high performance concrete (HPC) is becoming more and more popular mainly because of its great mechanical parameters. As in the case of ordinary power concrete (OPC) it is necessary to improve the load bearing capacity with using of reinforcement. The present age calls for using of very thin structures for reasons of both environmental parameters and visual quality. Based on this fact, reinforcement start to use durable composite materials, such as technical textiles made of them. Element of HPC with this type of reinforcement is called textile reinforced high performance concrete (TRHPC). It is impossible to use the traditional approach for usually used steel reinforcement if we want to design these extra-thin structures. Modeled structures are very sensitive for input parameters and the development of standards for TRC material lags. The present study is focused on the different method of approach for the determination of tensile modulus of composite reinforcement. Three used methods are compared with each other using numerical analysis of four point bending test of façade element for one type of used reinforcement. Curves from numerical analysis are finally compared with the curve from real experiment and based on this the final evaluation is generated.

scholarly journals ANÁLISE CUSTO-BENEFÍCIO ENTRE CONCRETO CONVENCIONAL E CONCRETO DE ALTO DESEMPENHO - ESTUDO DE CASO DE UM EDIFÍCIO RESIDENCIAL

2021 ◽  
Vol 9 (205) ◽  
pp. 1-34
Author(s):  
LARA BARBOSA DE SOUZA SANTOS
Keyword(s):  
High Performance ◽  
High Performance Concrete ◽  
Cost Benefit ◽  
Structural Elements ◽  
Conventional Concrete ◽  
Benefit Ratio ◽  
First Case ◽  
Consumption Rates ◽  
Cost Benefit Ratio ◽  
The Cost

The present study makes a comparative analysis of the cost-benefit ratio between Conventional Concrete (CC) and High Performance Concrete (CAD). To obtain the consumption rates of concrete, steel and shape of each case, two studies of the same structure were carried out, changing only one variable: the characteristic strength of concrete to compression (fck). In the first case, the 25 Megapascal fck (MPa) representing the CC was applied, and in the second case, 50 MPa fck corresponding to the CAD. For analysis of the structural elements, the Cypecad Software was used. It was found that one of the initial hypotheses, that the consumption of concrete, steel and form would decrease with the use of CAD, was confirmed. The second hypothesis, that the CAD would be more financially advantageous than the CC, was not confirmed, but factors that may have led to this non-confirmation were pointed out.

scholarly journals Damage Assessment using Acoustic Emission on Concrete Beam

2020 ◽  
Vol 9 (3) ◽  
pp. 2977-2981
Keyword(s):  
Acoustic Emission ◽  
Damage Assessment ◽  
High Performance ◽  
High Performance Concrete ◽  
Bending Test ◽  
Ultra High Performance Concrete ◽  
Reliable Technique ◽  
Damage Level ◽  
Three Point Bending ◽  
Selection Of

The selection of reliable technique for damage assessment is important in civil engineering structure. The present study proposed Acoustic emission (AE) technique by using the fundamental AE parameter to evaluate damage accumulated on Ultra High-Performance Concrete (UHPC) specimens. The UHPC beam with dimension of 515 mm x 98 mm x 98 mm was tested under three-point bending test with stepwise flexural load. In order to detect and to collect the AE data, Micro-SAMOS (μ-SAMOS) digital AE system and R6I sensors type were used while data analyses were carried out using AEwin software. The damage level that take place during increasing static loading on tested concrete beams and the mechanism was successfully evaluated using the AE technique.

Sign in / Sign up

Export Citation Format

Share Document