Multi-Objective Optimization Design of Hybrid Structure

2011 ◽  
Vol 243-249 ◽  
pp. 20-25
Author(s):  
Shan Suo Zheng ◽  
Zhi Qiang Li ◽  
Yi Hu ◽  
Qing Lin Tao ◽  
Wei Wang
Keyword(s):  
Reinforced Concrete ◽  
Optimization Design ◽  
Failure Modes ◽  
Hybrid Structure ◽  
Wall Structure ◽  
Reinforced Concrete Frame ◽  
Core Tube ◽  
Structure Damage ◽  
Concrete Frame ◽  
The Cost

The primary goal of failure modes-based optimization design which is to study the performance of structure without shocking absorption device is to transform the non-ideal failure modes of structure into the ideal failure modes, and then a small probability of the structure damage can be obtained. Although the study of this field is significant, no paper has so far attempted to study. Taking the cost of the structure into consideration, this paper aims at the failure modes-based optimization design. Therefore, an optimal approach based on failure modes with the ability to limit the cost is proposed. The procedure to obtain the failure modes-based optimization includes two phases, the concrete optimization and the shaped steel optimization. At last a reinforced concrete frame-shear wall structure is cited to verify the method developed. It is concluded that the method can supply an effective way to reduce both the damage and the cost of steel reinforced concrete framework-core tube structure.

Failure Modes-Based Multi-Objective Optimization Design of Steel Reinforced Concrete Frame Structures

2010 ◽  
Vol 450 ◽  
pp. 219-222 ◽  
Author(s):  
Shan Suo Zheng ◽  
Zhi Qiang Li ◽  
Bin Wang ◽  
Lei Li ◽  
Wei Wang
Keyword(s):  
Reinforced Concrete ◽  
Optimization Design ◽  
Failure Modes ◽  
Frame Structure ◽  
Reinforced Concrete Frame ◽  
Earthquake Intensity ◽  
Steel Reinforced Concrete ◽  
Concrete Frame ◽  
Reinforced Concrete Frame Structure ◽  
The Cost

The frame structure designed with the existing design code in zones of high earthquake intensity doesn’t satisfy with the expectation of strong column–weak beam. Therefore, a new optimal approach based on failure modes with the ability to limit the cost and the damage is proposed. In the process of optimization design, all the stories of a building with the same interstory drift is defined to obtiain the minor damage, while the damage values of beams and columns are difined to obtain the except failure modes. At last a six-story steel reinforced concrete frame structure is designed to verify the method developed inhere. It is concluded that the method can supply an effective way to reduce both the damage and the cost of steel reinforced concrete frame structure, and can obtain the except failure modes.

Resistance of Reinforced Concrete Frames with Masonry Infill Walls to In-Plane Vertical Loading

2016 ◽  
Vol 711 ◽  
pp. 982-988
Author(s):  
Alex Brodsky ◽  
David Z. Yankelevsky
Keyword(s):  
Reinforced Concrete ◽  
Failure Modes ◽  
Progressive Collapse ◽  
Lateral Loading ◽  
Masonry Walls ◽  
Reinforced Concrete Frame ◽  
Masonry Infill ◽  
Concrete Frame ◽  
Vertical Loading ◽  
Infill Masonry

Numerous studies have been conducted on the in plane behavior of masonry infill walls to lateral loading simulating earthquake action on buildings. The present study is focused on a problem that has almost not been studied regarding the vertical (opposed to lateral) in-plane action on these walls. This may be of concern when a supporting column of a multi-storey reinforced concrete frame with infill masonry walls undergoes a severe damage due to an extreme loading such as a strong earthquake, car impact or military or terror action in proximity to the column. The loss of the supporting column may cause a fully or partly progressive collapse to a bare reinforced concrete frame, without infill masonry walls. The presence of the infill masonry walls may restrain the process and prevent the development of a progressive collapse. The aim of the present study is to test the in-plane composite action of Reinforced Concrete (RC) frames with infill masonry walls under vertical loading through laboratory experiments and evaluate the contributions of infill masonry walls, in an attempt to examine the infill masonry wall added resistance to the bare frame under these circumstances. Preliminary results of laboratory tests that have been conducted on reinforced concrete infilled frames without a support at their end, under monotonic vertical loading along that column axis will be presented. The observed damages and failure modes under vertical loading are clearly different from the already known failure modes observed in the case of lateral loading.

Application of Value Engineering to the Ductility Design of RC Frame Columns with High Compression Ratio

2011 ◽  
Vol 255-260 ◽  
pp. 279-283
Author(s):  
Jun Qing Guo ◽  
Zhou Can Fu
Keyword(s):  
Reinforced Concrete ◽  
Design Method ◽  
Value Engineering ◽  
Reinforced Concrete Frame ◽  
Factors Affecting ◽  
Concrete Frame ◽  
High Compression ◽  
Major Factors ◽  
The Cost ◽  
Made In

This paper expatiates the prominent effect of axial compression ratios on the ductility of reinforced concrete frame columns and the limits of the ratios in Code for Seismic Design of Buildings and summarizes the ductility design methods of frame columns with high compression ratios. The principles of value engineering were adopted to analyze the major factors affecting the ductility of reinforced concrete frame columns. The cost of columns with high compression ratios and different types of ties in a real project was calculated and relevant analysis and evaluations were conducted according to Value Coefficient Discriminance. At last the optimum ductility design method for frame columns with high compression ratios was put forth, with which reference can be made in design.

Experimental Study of Partially Masonry Infilled Reinforced Concrete Frame under Lateral Loading

2017 ◽  
Vol 21 ◽  
pp. 22-32
Author(s):  
Prachand Man Pradhan ◽  
Ramesh Kumar Maskey ◽  
Prajwal Lal Pradhan
Keyword(s):  
Experimental Study ◽  
Reinforced Concrete ◽  
Failure Modes ◽  
Point Of View ◽  
Lateral Loading ◽  
Experimental Point ◽  
Reinforced Concrete Frame ◽  
Infilled Frames ◽  
Concrete Frame ◽  
Equivalent Strut

The partially infilled frames are considered vulnerable in terms of captive column effect for the events of earthquakes. Many reinforced concrete buildings have been affected due to captive column effects. Experimental study has been done to verify the captive column effect and its failure modes for partially infilled frames and the results have been compared with the ones obtained for a bare frame subjected to lateral loading. The results of experimental study have also been compared with some analytical results and the verification of equivalent strut width proposed by one of the authors has been done. From the experimental point of view, it is understandable that due to lateral loading to partially infilled frames, the damage pattern is diagonal and the failure of column occurs at the column-wall joint at the upper side of the wall. It is also seen that for fifty percent partially infilled frames, the stiffness of bare frame is enhanced slightly, however, the failure in the column during lateral loading indicates that the columns are subjected to high shear due to the presence of partial infill.

Study on Mechanical Performance of Wall-Column Subassembly in New Precast Reinforced Concrete Frame-Shearwall Structure

2013 ◽  
Vol 351-352 ◽  
pp. 1014-1017
Author(s):  
Hao Zhang ◽  
Jia Xin Tong ◽  
Wei Jian Zhao ◽  
Chang Zheng Sun
Keyword(s):  
Reinforced Concrete ◽  
Failure Modes ◽  
Mechanical Performance ◽  
Kinematic Hardening ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
Finite Element Software ◽  
Connection Method ◽  
Engineering Designs

A practical connection method of wall-column subassembly in new precast reinforced concrete frame-shearwall structure was proposed in this paper. Based on the general finite element software ABAQUS, numerical simulations were carried out on the mechanical performance of the precast and cast-in-situ wall-column subassemblies by using concrete damaged plastic model and bilinear kinematic hardening model. Results showed that mechanical performance of the precast wall-column subassembly, such as carrying capacities, deformations and failure modes, were almost equal to the cast-in-situ wall-column subassembly. Feasibility of the connection method which this paper proposed is verified preliminarily. The research results can provide theoretical references for related experimental researches, engineering designs and constructions.

Seismic Performance Analysis of Steel Reinforced Concrete Frame-Concrete Core Wall Structure

2011 ◽  
Vol 243-249 ◽  
pp. 740-745 ◽  
Author(s):  
Qing Ning Li ◽  
Qing Mei Liu ◽  
Lin Zhao
Keyword(s):  
Reinforced Concrete ◽  
Time History ◽  
Wall Structure ◽  
Reinforced Concrete Frame ◽  
Concrete Core ◽  
Steel Reinforced Concrete ◽  
Concrete Frame ◽  
High Rise ◽  
History Analysis ◽  
Rare Earthquake

A steel reinforced concrete frame-concrete core wall structure is taken as the research object in this paper. The whole space finite element models are established by software ETABS, modal analysis, response spectrum method and elastic time-history analysis are conducted. And static elastio-plastic time history analysis of the high-rise structure is conducted by software MIDAS/GEN. Seismic response of the high-rise structure is analyzed under medium earthquake and rare earthquake , elastic deformation is calculated under conventional earthquake and elastic-plastic deformation is calculated under rare earthquake. The results show that the structure can meet the requirements of no-damage under light earthquake, repairable under medium earthquake and no-collapse under strong earthquake.

scholarly journals Immune Genetic Algorithm for Optimizing Reinforced-Concrete Frame- Shear Wall Structure

2015 ◽  
Vol 9 (1) ◽  
pp. 602-609
Author(s):  
Zheng Yinrui ◽  
Zhu Jiejiang
Keyword(s):  
Genetic Algorithm ◽  
Reinforced Concrete ◽  
Shear Wall ◽  
Wall Structure ◽  
Reinforced Concrete Frame ◽  
Immune Genetic Algorithm ◽  
Vertical Stiffness ◽  
Concrete Frame ◽  
Wall Structures ◽  
Shift Angle

An immune genetic algorithm (IGA) is proposed to optimize the reinforced concrete (RC) frame-shear wall structures. Compared with the simple genetic algorithm (SGA), this algorithm has adaptive search capabilities for the future knowledge being used in the process of population evolution. Since the concrete grade of floors and the layout of walls are translated to binary codes, the implementation of this algorithm is not affected by the complexity of the structures. With I-typed vaccine, the continuous vertical stiffness of structure is ensured; With II-typed vaccine, the structures conforms to all the specifications which including floor shift angle, floor displacement ratio and period ratio. At the element level, the optimizing results satisfy all the specifications required by the current Chinese Codes. In this way, a computer program is created to get optimum design schemes.

scholarly journals Research on the Design and Detailing of a Re-constructional High-rise uilding Structure Project Reconstruction

2014 ◽  
Vol 8 (1) ◽  
pp. 450-454 ◽  
Author(s):  
Ling Yuhong ◽  
Lin BiaoYi ◽  
Ke Yu ◽  
Chen QingJun
Keyword(s):  
Reinforced Concrete ◽  
Shear Wall ◽  
Wall Structure ◽  
Strip Foundation ◽  
Reinforced Concrete Frame ◽  
Engineering Structures ◽  
Concrete Frame ◽  
High Rise ◽  
Concrete Pile ◽  
Pile Cap

This paper introduced the reconstruction practice and detailing of a high-rise reinforced concrete frame-shear wall structure. To fully utilize the old structure and meet the requirement of the reconstructed structure, certain measures have been put forward. The enlarging of concrete pile cap and adding strip foundation-beam were used to support the new added shear wall. The reconstruction concept detailing of the roof of basement, the enlarging of the beam or column sections and the application of the inclined column are introduced. The whole structure analysis shows that the reconstructed structure is safe enough to meet all the requirement of the designing code and the settlement observation shows that the deformation of the whole structure in gravity is small. The paper shows the design and detailing of the reconstructed engineering is effective and will be valuable to the similar engineering structures.

scholarly journals Factors in the Relationship Between Optimal CO2 Emission and Optimal Cost of the RC Frames

2020 ◽  
Author(s):  
Lida Mottaghi ◽  
Ramezan Ali Izadifard ◽  
Ali Kaveh
Keyword(s):  
Reinforced Concrete ◽  
Co2 Emissions ◽  
Carbon Dioxide Emissions ◽  
Reinforced Concrete Frame ◽  
Optimal Cost ◽  
Concrete Frame ◽  
Rc Frames ◽  
Greenhouse Gases Emissions ◽  
The Cost ◽  
The Relationship

Nowadays, reduction of greenhouse gases emissions from the construction industry is seriously under investigation. The aim of this study is to investigate the various effective factors on the relationship between optimal cost and optimal carbon dioxide emissions of the reinforced concrete structures with nonlinear structural behavior. A four-story reinforced concrete frame is designed for various peak ground accelerations (PGAs) and all ductility classes according to Iran’s seismic resistant design-2800 code, as well as for different concrete classes. The frames are optimally designed according to ACI 318-08 and FEMA codes. The results of optimal designs show that the design of structures with medium and high ductility class produces less cost and CO2 emissions than the low ductility class. On the other hand, the relationship between cost and CO2 emissions shows that in the low ductility class, increasing the percentage of the optimal cost can greatly reduce the amount of CO2 emissions. PGA design has a significant effect on reducing optimal cost and CO2 emissions. Especially in the low ductility class, reducing this parameter can greatly decrease the amount of the objective functions. Also, the use of concrete with low class can reduce the cost and CO2 emissions but the effect of this parameter in the objective is very small.

Risk Analysis of High-Rise Reinforced Concrete Frame-Shear Wall Structure in Progressive Collapse

2013 ◽  
Vol 639-640 ◽  
pp. 957-960
Author(s):  
Li Dong Yu ◽  
Hong Li
Keyword(s):  
Reinforced Concrete ◽  
Progressive Collapse ◽  
Shear Wall ◽  
Wall Structure ◽  
Load Path ◽  
Reinforced Concrete Frame ◽  
Concrete Frame ◽  
High Rise ◽  
Alternate Path Method ◽  
Current Code

The purpose of the this study was to find the influence of local members of high-rise reinforced concrete frame-shear wall structure failed in different position.Referred to the basic requirements against progressive collapse provided by JGJ03-2010,Based on alternate path method ,This paper presents an analysis procedure that made Linear static analysis to a modal of 24-storey frame-shear wall structure designed according to the current code with SAP2000.The results show that once the edge column failed ,the structure will collapse.However,the corner shear wall constitute little threat to the progressive collapse.After the local members failed ,the lower part of the building contribute to the load path and it can results in axial force ruleless in beams,which make against to load bearing if they are tensile forces.The concentrated tensile stress appears around the continuous beam,and it is possible to be broken early after local member failed if close to the failed shear wall.

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