A Market Scene Detection and Reinforcement of Large Roof Rack

2014 ◽  
Vol 1065-1069 ◽  
pp. 1012-1015
Author(s):  
Yong Yang ◽  
Xin Zhang ◽  
Meng Liang ◽  
Ming Fei Li ◽  
Zhao Peng Yang
Keyword(s):  
Bearing Capacity ◽  
Welding Process ◽  
Social Benefits ◽  
Original Network ◽  
Original Design ◽  
Construction Period ◽  
Check Calculation ◽  
Reinforcement Bar ◽  
Site Test ◽  
Tongji University

A mall large roof rack has been used 17 years. Because of upgrade, addition of decorate load, and missing the original design drawings, the spatial site test and check calculation of bearing capacity will have to be done. Using some detection tools, we can get arrangement, size, displacement, deformation, etc. And we can sue 3d3s software of Tongji University to check the calculation of bearing capacity. Through calculation and analysis, put forward to the original network frame the whole pre-stressing reinforcement and part of steel reinforcement bar outsourcing way, satisfying the requirements of design and specification, and to avoid the welding process, shorten the construction period, and achieved good social benefits.

scholarly journals Application of temporary reinforcement technology in insufficient construction of the understructure bearing capacity of viaduct

2019 ◽  
Vol 136 ◽  
pp. 04080
Author(s):  
Guohui Cao ◽  
Reqiang Liu ◽  
Jing Liu ◽  
Xiang Gao ◽  
Peng Wang
Keyword(s):  
Bearing Capacity ◽  
Three Dimensional ◽  
Social Benefits ◽  
Construction Technology ◽  
Project Cost ◽  
Special Cases ◽  
Project Construction ◽  
Lower Structure ◽  
Traditional Construction

The complex three-dimensional traffic construction often occur when the lower structure cannot bear the construction load and other special cases, indicating the need for temporary reinforcement of the lower structure. In this paper, combined with a project construction example, various temporary reinforcement technologies are adopted to solve the insufficient bearing capacity during understructure construction, which poses a serious danger, to ensure synchronous construction of the understructure and viaduct. Compared with the traditional construction technology, the temporary reinforcement technology proposed in this paper features the advantages of saving project cost and time and has achieved better economic and social benefits.

Slope stability and bearing capacity of landfills and simple on-site test methods

2017 ◽  
Vol 35 (7) ◽  
pp. 730-738 ◽  
Author(s):  
Atsushi Yamawaki ◽  
Yoichi Doi ◽  
Kiyoshi Omine
Keyword(s):  
Slope Stability ◽  
Bearing Capacity ◽  
Test Methods ◽  
Site Test

Reinforcement Technology of Space Grid Structure for Reconstruction of Shandong Qufu Xingtan Theater

2011 ◽  
Vol 243-249 ◽  
pp. 5487-5490
Author(s):  
Lian Fen Weng ◽  
Ming Gong ◽  
Zhen Hua Liu ◽  
Xiao Bei Wang
Keyword(s):  
Bearing Capacity ◽  
Double Layer ◽  
Mechanical Performance ◽  
Slenderness Ratio ◽  
Social Benefit ◽  
Grid Structure ◽  
Construction Period ◽  
Structure System ◽  
Space Grid ◽  
Temporary Structure

Shandong Qufu Xingtan Theater, originally built for an open-air theater, was designed as a one-time temporary structure with bolt ball junction double-layer regular pyramids grid structure roofing system. Because of the transformation of open-air structure system to an enclosed construction, some members of the space grid structure can not meet the required bearing capacity. According to the mechanical performance of space grid structures, the reinforcement methods of “circular steel jacketing” and “lateral support” are conducted, which are based on the analysis of the stress and stability characteristics of different grid members. By using the methods given above, the stress and slenderness ratio is decreased. The results indicate that the two reinforcement methods can reduce the difficulty in construction, shorten the construction period, and gain good economic and social benefit.

Research on Nonlinear Modeling and Simulation for Flexible Drive Train of Wind Turbine

2012 ◽  
Vol 424-425 ◽  
pp. 1041-1043
Author(s):  
Wen Hui Zhao ◽  
Zhen Yun Duan ◽  
She Liu
Keyword(s):  
Wind Turbine ◽  
Nonlinear Modeling ◽  
Uncertain System ◽  
Drive Train ◽  
Social Benefits ◽  
Modeling And Analysis ◽  
Construction Period ◽  
Modeling Methods ◽  
And Control ◽  
Nonlinear Uncertain System

Wind energy has preferable economic and social benefits because of its cleanliness and free pollution, short construction period, and so on. The wind turbine is a complicated nonlinear uncertain system. So the modeling and analysis of system is crucial to the system design of wind turbines. Drive train performance of wind turbine was analyzed, and modeling methods were presented according to rigid drive train and flexible drive train. Based on those models, software has been designed to show the performance of the wind turbine, and then contrast with the result that simulated by GH Bladed software, to verify the accuracy of the models. The results show that the models can be used in optimum design and control strategy.

In-Plane Stability Bearing Capacity of Variable Section Column

2014 ◽  
Vol 578-579 ◽  
pp. 717-722
Author(s):  
Ming Chen ◽  
Xiao Fei Ma
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Bearing Capacity ◽  
Practical Application ◽  
Element Analysis ◽  
Construction Period ◽  
Stability Bearing Capacity ◽  
Portal Frame ◽  
Variable Section ◽  
Traditional Structures

Variable section portal frame is increasingly concerned and is widely used for its economy, beauty and short construction period, compared with other traditional structures. In-plane stability response of variable section columns of portal frames is the focus of this paper. Results are presented for parameters influence of variable section column on the in-plane stability bearing capacity with finite element analysis. References are proposed for practical application compared with computational formulas of Technical Specification for Steel Structure of Light-Weight Buildings with Gabled Frames.

Design Research and Technical Application of the Multi-Type-Pile Composite Foundation

2012 ◽  
Vol 170-173 ◽  
pp. 110-114
Author(s):  
Yan Gao ◽  
Hui Min Li ◽  
Ji Ling Yao
Keyword(s):  
Bearing Capacity ◽  
Design Research ◽  
Composite Foundation ◽  
Social Benefits ◽  
Drilling Machine ◽  
Construction Technology ◽  
Practical Application ◽  
Technical Application ◽  
Foundation Soil ◽  
High Rise

Through project example, analysis of the multi-type-pile composite foundation (lime pile plus CFG pile) in the practical application of liquefied foundation of high-rise building, especially using the ZFZ construction technology which forwards formed a hole and reverses packed into a compaction pile by a long spiral drilling machine to eliminate liquefaction of foundation soil and improve the bearing capacity of foundation is very notable, in addition, it also produces good economic and social benefits, so it has great value of promotion and use.

Research on Application of Suction Bucket Foundation for Transmission Tower in River Network Area

2014 ◽  
Vol 919-921 ◽  
pp. 727-730 ◽  
Author(s):  
Li Qin ◽  
Jin Xin Zhu ◽  
Si Wen Zhao
Keyword(s):  
Bearing Capacity ◽  
Low Cost ◽  
Soft Clay ◽  
River Network ◽  
Transmission Tower ◽  
Construction Period ◽  
Bucket Foundation ◽  
Element Simulation ◽  
Clay Ground ◽  
Research On Application

Because the suction bucket foundation is construction period and low cost advantages,application of suction bucket foundation is more and more widely. In this paper, whether the suction bucket foundation can be used as the basis of transmission tower in river area were studied.According to the working mechanism of bucket foundation in soft clay ground and characteristics, through ABAQUS finite element simulation, bearing capacity under the pressure and uplift ultimate draw suction bucket foundation, and compare with the experimental results, verify the feasibility and accuracy of simulation.According to the transmission requirements of bearing capacity of the foundations,design the basic size,and verify whether the requirements of bearing capacity of foundation, confirmed the suction bucket foundation can be applied to the area of river network transmission tower.

Safety Assessment of Slant Legged Rigid Frame Bridge Based on Field Testing

2013 ◽  
Vol 574 ◽  
pp. 163-175
Author(s):  
Yan Li ◽  
Hong Tao Bi ◽  
Bing Han Li ◽  
Yong Jun Wang
Keyword(s):  
Finite Element ◽  
Numerical Analysis ◽  
Bearing Capacity ◽  
Field Testing ◽  
Control Measures ◽  
Original Design ◽  
Loading Test ◽  
Element Analysis ◽  
Rigid Frame ◽  
Rigid Frame Bridge

The safety and load-bearing capacity of an in-service urban reinforced concrete slant leg rigid frame bridge over railway is assessed by field testing and finite element analysis. The bridge is located in Qitaihe city, the northeastern of China. The two heavy trucks and three different loading test configurations are used in experiment. The three load figuration is set up and performed based on the result of technical condition investigation and finite element numerical analysis. The vertical displacement and key section strain response are recorded during experiment. Loading-bearing capacity and safety performance of the bridge is analyzed and evaluated according to measured data combining with numerical analysis. The testing result shows that structural stiffness and strength of the bridge do not satisfy the requirements of the original design. Based on the assessment result, some proposals are proposed to the management office. A moderate maintenance and reinforcement treatment should be carried out for this bridge to improve the bearing capacity and ensure safety operation. Before that completed some traffic control measures should be taken to avoid aggravating diseases and damages of the bridge due to passing heavy vehicle.

scholarly journals Comparative Analysis of Three Typical Cantilever Scaffold Supporting Systems

2021 ◽  
Author(s):  
Dajiang Geng ◽  
Ning Dai ◽  
De Zhang ◽  
Xuesheng Jin ◽  
Minjian Long
Keyword(s):  
Finite Element Method ◽  
Internal Force ◽  
Social Benefits ◽  
Engineering Practice ◽  
The Finite Element Method ◽  
Construction Period ◽  
Distribution Uniformity ◽  
Force Mechanism ◽  
Main Girder ◽  
Selection Of

Abstract In order to effectively guide the selection of scaffold in designing the cantilever scaffold, comprehensive analyses of three typical scaffold supporting systems (including fully cantilever, bottom-supporting cantilever and pull-up cantilever) are carried out. The calculation formulas of the internal force for the three scaffold supporting systems are proposed based on the theoretical analysis, which are effectively verified by the finite element method (FEM). In addition, the force mechanism and benefits of the three scaffold supporting systems are compared and analyzed combined with actual engineering. The results indicate that there is high calculating accuracy for the proposed internal force and deflection calculation formulas about the scaffold supporting systems. According to the distribution uniformity of the internal force and controlling of the deformation of the main girder, the bottom-supporting cantilever system is undoubtedly the best choice. While the pull-up cantilever supporting system is the best choice when considering the aspects of cost, construction period and social benefits, which ought to be popularized in engineering practice.

scholarly journals Bearing capacity of pultrusion fiberglass gusset sheets in frame structures

Vestnik MGSU ◽  
2020 ◽  
pp. 1115-1125
Author(s):  
Daler N. Aripov ◽  
Ivan L. Kuznetsov ◽  
Marat A. Salakhutdinov
Keyword(s):  
Composite Material ◽  
Bearing Capacity ◽  
Composite Structures ◽  
Treatment Method ◽  
Frame Structure ◽  
Design Solution ◽  
Frame Structures ◽  
Original Design ◽  
Gusset Plate ◽  
Design Solutions

Introduction. At present, design and construction of all-composite structures with the use of pultrusion fiberglass profiles (PFP) are developing. The bearing capacity of all-composite structures is often limited by their node connections. Over the last two decades, many studies have been devoted to the operation of fiber-reinforced polymer (FRP) element nodes connected at right angles (or in the direction of pultrusion and across it). Frame construction nodes are formed by adjoining frame elements at different angles to the bands through gusset sheets. In accordance with the literature analysis, a small number of tests have been carried out to investigate connections at angles to the pultrusion direction. Existing design solutions of gusset sheets in FRP frame structures are mainly made of steel or composite material produced using other technologies (compaction method, pressure treatment method). This study focuses on the implementation of a node connection on unidirectional gusset sheets in which the fibers are positioned at the angle of 0°. Taking into account the specific features of the material, the gusset sheet design in frame structures has been adapted to the properties of pultrusion fiberglass. The purpose of this study is to increase the efficiency of PFP gusset sheet use in frame structures based on the specifications of this material. Materials and methods. The adaptive method was used when designing the node connection design on the frame structure gusset sheets. The material of the trapezoidal steel truss is changed to the composite material while retaining the original design solution. Subsequently, the structure is upgraded to take into account the properties and features of the composite material. Results. The main results of the study involve determining the factor of safety of pultrusion fiberglass at different angles to the direction of force. In order to increase the bearing capacity of the element node connection, various gusset plate design solutions are provided, which take into account different forces in the frame structure elements. Conclusions. When designing PFP constructions, features of the material must be taken into account. Replacing traditional materials with composite without adjusting the design layout and upgrading the structure leads to increased material intensity.

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