Development of strut‐and‐tie models using topology optimization based on modified optimal criterion

2021 ◽  
Author(s):  
Linyun Zhou ◽  
Shui Wan
Keyword(s):  
Topology Optimization ◽  
Strut And Tie ◽  
Optimal Criterion

A computational and experimental study for the optimum reinforcement layout design of an RC frame

2016 ◽  
Vol 33 (2) ◽  
Author(s):  
Fatih Mehmet ÖZKAL ◽  
Habib UYSAL
Keyword(s):  
Topology Optimization ◽  
Design Methodology ◽  
Design Method ◽  
Integrated Design ◽  
Integrated Approach ◽  
Optimization Method ◽  
Layout Design ◽  
Experimental Comparison ◽  
Strut And Tie ◽  
Optimum Reinforcement

Purpose Compared with conventional design methods, strut-and-tie modeling is a more suitable and even a superior method for the reinforcement layout design of structural members with uncommon geometrical shapes and/or regions essentially subject to shear effects. Because the determination of the optimum strut-and-tie model for each of the members is an important task, the implementation of a topology optimization method could be useful before the detailing stage. Design/methodology/approach Optimum reinforcement layout of a concrete frame was designed by an integrated approach, which consists of the topology optimization and strut-and-tie modeling methods. Subsequently, an experimental comparison of the new model with the conventional model was performed based on their structural behaviors. Findings Depending on the experimental results, it was concluded that the new integrated design method presents more successful results than does the conventional method for the design of reinforced concrete (RC) members. Originality/value The preference of the new method will facilitate the design process by eliminating the experience required of design engineers.

A FULLY STRESSED DESIGN METHOD TO DETERMINE THE OPTIMUM STRUT-AND-TIE MODEL FOR BEAM–COLUMN CONNECTIONS

2012 ◽  
Vol 09 (03) ◽  
pp. 1250035 ◽  
Author(s):  
FATİH MEHMET ÖZKAL ◽  
HABİB UYSAL
Keyword(s):  
Topology Optimization ◽  
Optimum Design ◽  
Design Method ◽  
Strut And Tie ◽  
Fully Stressed Design ◽  
As Stress ◽  
Strut And Tie Model ◽  
Parameter Values ◽  
Element Removal ◽  
Stressed Design

Topology optimization and strut-and-tie model methods have a remarkable success in the detailing of reinforced concrete structures, especially for discontinuity regions of the beam–column connections. However, it has always been complicated to determine an optimum design throughout all the offers of an optimization process, since it is not obvious which of the decision variables should be considered in order to select the optimum design. This paper presents the application of a new selection method on topology optimization and strut-and-tie modeling of the beam–column connections. A performance index formulation assists the selection of the optimum design from the process by considering the fully stressed design concept unlikely other performance indices. Former indices take just one of the structural criterions into consideration such as stress, strain energy, displacement, etc. The efficiency and capability of the approach have been demonstrated by the comparison of element removal criterions and different parameter values on several bidimensional design examples.

scholarly journals Applications of truss topology optimization in the design of reinforced concrete structures using „Strut and Tie” models

2013 ◽  
Vol 12 (1) ◽  
pp. 091-098
Author(s):  
Karol Bołbotowski ◽  
Michał Knauff ◽  
Tomasz Sokół
Keyword(s):  
Topology Optimization ◽  
Reinforced Concrete ◽  
Truss Topology Optimization ◽  
Ground Structure ◽  
Structure Approach ◽  
Strut And Tie ◽  
Truss Topology ◽  
Practical Design ◽  
The Cost ◽  
Ground Structure Approach

Although Strut and Tie models are often used in practical design due to their apparent concept based on truss analysis, the creation of a model consistent with behaviour of the real structure is not an easy task. Frame corner model considered in the paper and presented in code [7] and article [8] exemplifies the problem. The authors proposed a method of automatic generating of ST models by making use of truss topology optimization (volume minimization problem). The method is based on classical ground structure approach. The authors introduced a method of including the cost of nodes in the objective function, which allowed to obtain solutions consisting of rationally small number of bars (unlike Michell’s structures). Moreover, algorithms ensuring consistency with Eurocode requirements were developed. The method was implemented in computer program. With the use of the software the authors proposed an alternative ST model for the frame corner, which requires considerably less reinforcement steel in comparison with the model suggested by the code. The versatility of the program was well proven in several other examples of plane stress problems in reinforced concrete design.

Sign in / Sign up

Export Citation Format

Share Document