scholarly journals Embodied Energy Optimization of Prestressed Concrete Slab Bridge Decks

Technologies ◽  
2018 ◽  
Vol 6 (2) ◽  
pp. 43 ◽  
Author(s):  
Julián Alcalá ◽  
Fernando González-Vidosa ◽  
Víctor Yepes ◽  
José Martí
Keyword(s):  
Prestressed Concrete ◽  
Concrete Slab ◽  
Bridge Decks ◽  
Energy Optimization ◽  
Embodied Energy

FINITE ELEMENT ANALYSIS OF PRESTRESSED CONCRETE VOIDED BRIDGE DECKS

PCI Journal ◽  
1973 ◽  
Vol 18 (3) ◽  
pp. 51-66 ◽  
Author(s):  
J. C. Jofriet ◽  
G. M. McNeice ◽  
P. Csagoly
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Prestressed Concrete ◽  
Bridge Decks ◽  
Element Analysis

scholarly journals Embodied Energy Optimization of Buttressed Earth-Retaining Walls with Hybrid Simulated Annealing

2021 ◽  
Vol 11 (4) ◽  
pp. 1800
Author(s):  
David Martínez-Muñoz ◽  
José V. Martí ◽  
José García ◽  
Víctor Yepes
Keyword(s):  
Retaining Wall ◽  
Cost Optimization ◽  
Energy Optimization ◽  
Optimization Criterion ◽  
Embodied Energy ◽  
Economic Optimization ◽  
Hybrid Simulated Annealing ◽  
The Difference ◽  
Reduce Emissions ◽  
Geometric Variables

The importance of construction in the consumption of natural resources is leading structural design professionals to create more efficient structure designs that reduce emissions as well as the energy consumed. This paper presents an automated process to obtain low embodied energy buttressed earth-retaining wall optimum designs. Two objective functions were considered to compare the difference between a cost optimization and an embodied energy optimization. To reach the best design for every optimization criterion, a tuning of the algorithm parameters was carried out. This study used a hybrid simulated optimization algorithm to obtain the values of the geometry, the concrete resistances, and the amounts of concrete and materials to obtain an optimum buttressed earth-retaining wall low embodied energy design. The relation between all the geometric variables and the wall height was obtained by adjusting the linear and parabolic functions. A relationship was found between the two optimization criteria, and it can be concluded that cost and energy optimization are linked. This allows us to state that a cost reduction of €1 has an associated energy consumption reduction of 4.54 kWh. To achieve a low embodied energy design, it is recommended to reduce the distance between buttresses with respect to economic optimization. This decrease allows a reduction in the reinforcing steel needed to resist stem bending. The difference between the results of the geometric variables of the foundation for the two-optimization objectives reveals hardly any variation between them. This work gives technicians some rules to get optimum cost and embodied energy design. Furthermore, it compares designs obtained through these two optimization objectives with traditional design recommendations.

Review of Research on the Seismic Behavior of Integral Prefabricated Prestressed Concrete Slab-Column Structure

2013 ◽  
Vol 831 ◽  
pp. 176-180 ◽  
Author(s):  
Li Li Wu ◽  
Ya Can Cui ◽  
Rong Bin Zhou ◽  
Jia Qing Shi ◽  
Peng He ◽  
...  
Keyword(s):  
Research Methods ◽  
Seismic Performance ◽  
Prestressed Concrete ◽  
Seismic Behavior ◽  
Concrete Slab ◽  
Research Priorities ◽  
Structural System ◽  
Column Structure

The integral prefabricated prestressed concrete slab-column structure was a new structural system introduced to China in 1980s. The structure has a series of obvious advantages and the scholars focus research priorities on its seismic performance. The research methods and developments of seismic behavior of the slab-column structure are summarized, and some measures are also put forward to improve the seismic behavior.

Thermo-Hygral and Environmental Evaluation of Chosen Parts of an Ultra-Low-Energy Family Houses

2019 ◽  
Vol 887 ◽  
pp. 393-400
Author(s):  
Peter Turcsanyi ◽  
Anna Sedláková ◽  
Eva Kridlova-Burdova ◽  
Silvia Vilčeková
Keyword(s):  
Global Warming ◽  
Concrete Slab ◽  
Low Energy ◽  
Embodied Energy ◽  
Two Dimensional ◽  
Reinforced Concrete Slab ◽  
Environmental Evaluation ◽  
Acidification Potential ◽  
Family House ◽  
Thermo Physical Properties

The goal of this paper is to assess two ultra-low-energy family houses from thermo-physical aspects and environmental perspectives. Thermo – physical evaluation, done in two-dimensional PC software Area, has shown results that consent with the newest standards for designing critical details in two ultra-low-energy family houses. Both cases show correctness in design in regards to thermo-physical properties. Both critical spots – corners are well insulated with surface temperatures over 17°C, which indicates low risk of mold occurring. Most of the embodied energy is in roof construction with value of 3084 MJ in house A and 1943 MJ in house B. In terms of indicator of global warming potential, most emissions were calculated in bearing walls of house B (593 kgCO2eq/m2). From the acidification potential, the most emissions were determined in the roof construction B (1.02283 kgSO2eq/m2). It can be stated that financial expenses on groundwork and preparing polystyrene casing for a reinforced concrete slab is significantly higher (family house A) than for foundation insulated from the exterior side with extruded polystyrene (family house B).

Experimental Research of Cable in Plate Method

2013 ◽  
Vol 351-352 ◽  
pp. 919-922
Author(s):  
Ping Pang ◽  
Xin Sheng Yin
Keyword(s):  
Theoretical Calculation ◽  
Experimental Research ◽  
Prestressed Concrete ◽  
Calculation Method ◽  
Concrete Slab ◽  
Plate Method

According to the research, a new arrangement method of prestressed concrete slab is provided. It has not been mentioned before and this article discussed unbonded prestressed concrete slab system, and gives the theoretical calculation method.

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