Research on the Virtual Test Technique of Tower Crane Jib

2012 ◽  
Vol 220-223 ◽  
pp. 521-525
Author(s):  
Bin Li ◽  
Shao Shuai Xu ◽  
Hong Zhang ◽  
Fu Mian Wang ◽  
Xin Zhao
Keyword(s):  
Model Building ◽  
Parameter Extraction ◽  
Construction Technology ◽  
Dead Weight ◽  
Heavy Load ◽  
Test Technique ◽  
Virtual Test ◽  
Finite Element Software ◽  
Tower Crane ◽  
Jib Structure

With the development of construction technology, the increasingly high performance requirements for tower crane, its technical performance, strength and longevity is particularly important. The metal structure is an important part of the tower crane, which bears the dead weight of the tower crane and a variety of the work of external loads. Strength, stiffness and stability are used to ensure safe and reliable work of the tower crane; otherwise, major accident may happen. With the tower crane to the development of large, heavy load and ultra-high, the test of the structure is particularly important. The research on the virtual test technique of tower crane jib in this paper bases on the characteristic parameter extraction of the jib structure, using the parameterized APDL programming language of finite element software ANSYS to do statics analysis by model building, and complete the virtual text of the jib. Finally obtain the corresponding results data of the actual test inspection and the location as well as the virtual test value of the most dangerous point, to determine the safe reliability of the jib structure and the rationality of material use.

The Analysis of Stiffness and Stability of Luffing Jib Cranes Based on Theory of Second Order

2013 ◽  
Vol 419 ◽  
pp. 197-202
Author(s):  
Yuan Xue ◽  
Jun Li ◽  
Nian Li Lu ◽  
Da Qi Wu
Keyword(s):  
Finite Element ◽  
Amplification Factor ◽  
Linear Method ◽  
Order Effect ◽  
Second Order ◽  
Dead Weight ◽  
Lateral Deflection ◽  
Finite Element Software ◽  
Tower Crane ◽  
Deflection Amplification Factor

Luffing jib cranes are large flexible complex truss structure, and their mechanical property is nonlinearity. So the Precise analysis method for the stiffness and stability problem has been paid attention to by the researchers. To solve this problem, the equivalent mechanical model of luffing jib crane was established by taking the lifting load, counter weight and dead weight into consideration. The stiffness and stability of luffing jib crane was analyzed by using the differential equation of deflection based on second-order effect. The calculating formulas of lateral deflection, amplification factor of deflection and stability was derived. Taking a luffing jib tower crane for example, the lateral stiffness was calculated respectively by the formula given by this paper, the traditional linear method and the finite element method, and show that the result calculated by the formula given by this paper is identical to that by finite element software ANSYS, the error is 1.8%. and the error of traditional method is 7.6%, It is clear that calculation expression of lateral deflection, deflection amplification factor and the stability in this paper are accuracy. This method can be applied to the analysis of calculation of luffing jib tower crane stiffness and stability.

Study on Dynamic Behavior of Ancient Timber Structures Roof

2013 ◽  
Vol 475-476 ◽  
pp. 1559-1562
Author(s):  
Jun Dai
Keyword(s):  
Dynamic Behavior ◽  
Vibration Isolation ◽  
Shaking Table Test ◽  
Shaking Table ◽  
Maximal Response ◽  
Construction Technology ◽  
Magnification Factor ◽  
Finite Element Software ◽  
Moderate Earthquake ◽  
Dynamic Magnification Factor

The roof model of the palace timber buildings was established according to the construction technology of the Ying-tsao fa-shih. Based on its analysis of dynamic behavior with shaking table test and ANSYS finite element software, the dynamic behavior of structure and its maximal response under different conditions were gotten, and also the dynamic magnification factor of the beams layer and the whole structure were gotten, at last the results got by shaking table test was compared with the numerical simulation. Research shows that the nature frequency of the model is 1.486 Hz which is much bigger than that of the whole structure; the maximal displacement of beam layer gradually increases with the increase of ground motion intensity and the height of structure; the vibration isolation performance of semi-rigid tenon-mortise joints in rare earthquake (400gal) is better than that in moderate earthquake (220gal) and frequent earthquake (110gal); the dynamic magnification factor between layers was about 1, and roof 0.9 or so.

Research Status and Development Application of Ceramsite Concrete Short Pier Shear Wall

2012 ◽  
Vol 238 ◽  
pp. 608-610
Author(s):  
Bin Hu ◽  
Rong Yue Zheng ◽  
Bi Fei Zhou
Keyword(s):  
Shear Wall ◽  
Construction Technology ◽  
Social Efficiency ◽  
Dead Weight ◽  
Industry Waste ◽  
High Rise ◽  
Building Plane ◽  
Heat Preservation ◽  
Good Heat ◽  
Development Application

Currently our country high-rise construction technology develops forward an important content to reduce the structure dead weight. The ceramsite concrete which makes full use of industry waste material obtains the good social efficiency and helps to reduce the structure dead weight effectively. At the same time, it has the good heat preservation performance as well as the fire protection performance. The short pier shear wall comes by the general shear wall development. It has absorbed irregular cross-section column structure’s merits. It is also easy to satisfy each kind of building plane request. Moreover, it has the lighter weight, saves the material and decreases earthquake function contrast to the general shear wall.

scholarly journals The Key Construction Technology Research on the Intercontinental Shanghai Wonderland

2020 ◽  
Vol 2020 ◽  
pp. 1-16
Author(s):  
Peng Jiang ◽  
Shaole Yu ◽  
Wei Luan ◽  
Xinxi Chen ◽  
Yang Qin ◽  
...  
Keyword(s):  
Finite Element ◽  
Dynamic Response ◽  
Safety Margin ◽  
Time History ◽  
Construction Technology ◽  
Construction Process ◽  
Component Size ◽  
Finite Element Software ◽  
Deep Pit ◽  
The Stability

The Intercontinental Shanghai Wonderland is the first natural ecological hotel built in an abandoned mine in the world, which faces many difficulties in the construction process. To solve the difficult problems in the construction process, the study was carried out from the stability analysis of the deep pit cliff, the mechanical performance of the structure, and the construction technology. The Intercontinental Shanghai Wonderland is built around the abandoned deep pit cliffs, and the stability of the deep pit cliffs directly affects the safety of the building. The dynamic response characteristics and the instability characteristics of the mine slope under the dynamic response were analyzed by a three-dimensional dynamic finite element method. The calculation results showed that with effective anchoring support measures, the stability coefficient of slope under static load and small earthquakes was large, which had a certain safety margin. Under the action of large earthquakes, the slope could still meet the stability requirements. The structure of the Intercontinental Shanghai Wonderland is a unique two-point support structure system. It shows the deformation and stress characteristics of one fixed end and one simply supported end under horizontal load. The elastic-plastic time history response of structures under actions of rare earthquakes was analyzed through the finite element analysis software. The analysis results show that the current structural system along with the design of component size and strength can meet the seismic performance of the structure under actions of rare earthquakes. The Intercontinental Shanghai Wonderland was built in a stone pit 88 m below the surface. Therefore, the transportation of materials was a difficulty in the construction process. A set of ultradeep concrete downward conveying equipment was invented to solve the difficulty. The construction process of the whole structure was simulated by finite element software, which provided a safety guarantee for the construction of the whole structure.

The Deformation Analysis about Guide Way Contact of Large Span and Heavy Load Cross-Rail

2010 ◽  
Vol 26-28 ◽  
pp. 93-97 ◽  
Author(s):  
Yong Sheng Zhao ◽  
Xue Jiao Dong ◽  
Tie Neng Guo ◽  
Wen Tong Yang
Keyword(s):  
Simulation Method ◽  
Numerical Control ◽  
Deformation Condition ◽  
Deformation Analysis ◽  
Load Curve ◽  
Heavy Load ◽  
Large Span ◽  
Finite Element Software ◽  
Rail Structure ◽  
Superposition Effect

The article used the large span and heavy load cross-rail of some machine tools plant’s heavy-type numerical control milling planer for research object, by using the finite element software to build the model and force analysis. It also researched the force distribution and deformation condition of the large span motion girder under the actual working condition. It considered the slide carriage superposition effect to build the describing method and establishing process of the large span load curve by contacting analysis and restraining analysis, and got the knifepoint trajectory deformation. The research provided the sufficient theory basis and simulation method for designing improvement of cross-rail structure and got a perfect arch in advance.

Construction Technology of Large-Span Hybrid Structure of Suspendome with Stacked Arch in Chiping Gymnasium

2011 ◽  
Vol 243-249 ◽  
pp. 6083-6086 ◽  
Author(s):  
Xiao Bei Wang ◽  
Zhen Hua Liu ◽  
Ming Gong ◽  
Lian Fen Weng
Keyword(s):  
High Altitude ◽  
Steel Structure ◽  
Hybrid Structure ◽  
Construction Technology ◽  
Large Span ◽  
Finite Element Software ◽  
Roof Structure ◽  
Temporary Support ◽  
Stress And Deformation ◽  
Lattice Shell

Large-span hybrid structure of suspendome with stacked arch is applied into steel roof of Chiping Gymnasium. The construction of this new type structure system is difficult according to structure characteristics such as its large-span stacked arch, high installation altitude, lattice shell installation, prestressed cable tension, and tight construction period. Temporary support frame, segment lifting and high altitude splicing construction method is adopted to install the stacked arch, and total support, high-altitude spread operation method is used to install lattice dome. A spatial structural analysis is conducted on the supporting system, and the finite element software is adopted to simulate and analyze the installation process of the steel structure roof system. At the same time, stress and deformation of the roof structure are monitored by precise instruments and equipments. As the result, construction safety and quality are guaranteed.

Virtual Prototype Based Virtual Test Technique for Fatigue Life of Ship Structure

2009 ◽  
Author(s):  
Huilong Ren ◽  
Xiaobo Liu ◽  
Luodong Li ◽  
Guoqing Feng ◽  
Chenfeng Li
Keyword(s):  
Fatigue Life ◽  
Simulation Analysis ◽  
Electronic System ◽  
Virtual Prototype ◽  
Test System ◽  
Test Technique ◽  
Ship Structure ◽  
Automobile Manufacturing ◽  
Virtual Test ◽  
Initial Stage

Virtual test (VT) technique is a new kind of test technique which takes computer simulation analysis as its core. It develops rapidly in aviation, automobile manufacturing as well as in electronic system, but it is at an initial stage in ship field. In this paper, the virtual prototype (VP) based virtual test technique for fatigue life of ship structure was studied, and a virtual test system for fatigue life of ship structure was developed.

Critical considerations on tower crane layout planning for high-rise modular integrated construction

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Zhiqian Zhang ◽  
Wei Pan ◽  
Mi Pan
Keyword(s):  
Influencing Factors ◽  
Multicriteria Decision Making ◽  
Critical Issue ◽  
Performance Criteria ◽  
Construction Technology ◽  
Layout Planning ◽  
Content Type ◽  
High Rise ◽  
Tower Crane ◽  
Large Size

PurposeModular integrated construction (MiC) is the most advanced off-site construction technology. However, the application of MiC for high-rise buildings is still limited and challenging. One critical issue is tower crane layout planning (TCLP) to guarantee safe and efficient multiple crane-lifts for module installation, which, however, has been insufficiently explored. For filling this knowledge gap, this paper aims to systematically explore the critical considerations on TCLP for high-rise MiC to support contractors in determining the optimal crane layout plan.Design/methodology/approachThis study employed a multimethod strategy. First, previous studies on TCLP and critical features of MiC were reviewed to develop a conceptual model of TCLP considerations. Second, expert interviews with 15 construction planners were conducted to identify the critical TCLP considerations for high-rise MiC. Third, a multicase study with three high-rise MiC projects was undertaken to demonstrate and verify the identified considerations.FindingsThe paper characterises critical considerations on TCLP as performance criteria and influencing factors and identifies 7 critical performance criteria and 25 influencing factors for high-rise MiC. Specifically, the features of MiC (e.g. various modularised layout design, heavyweight and large size of modules) were found to significantly affect the crane layout performance (i.e. technical feasibility, safety and economic efficiency).Originality/valueThe paper is the first-of-its-kind study on crane layout planning for high-rise modular buildings, which contributes a two-stage multicriteria decision-making framework integrated with systematic TCLP considerations. The findings should help contractors determine safe and efficient tower crane layout plans for high-rise MiC projects.

Static Load Test and Analysis on Completed Deck Arch Bridge of Large-Span Reinforced Concrete

2012 ◽  
Vol 490-495 ◽  
pp. 3444-3448
Author(s):  
Peng Wang ◽  
Dan Lv ◽  
Guo Qiang Liu
Keyword(s):  
Reinforced Concrete ◽  
Load Capacity ◽  
Load Test ◽  
Static Load Test ◽  
Test Technique ◽  
Arch Bridge ◽  
Large Span ◽  
Finite Element Software ◽  
Bridge Model ◽  
Working Performance

Based on the requirements of load test technique on existing long-span concrete bridge, a deck arch bridge of large-span reinforced concrete was taken as the engineering background and the emulation analysis was done by building the bridge model using the finite element software Midas/Civil. The values of stress and deflection were measured and calculated. The results of the test show that the static working performance of the arch bridge is fine, the stiffness and load capacity meet the requirements of the design and the construction quality is good. It can provide references for the bridge design of the same type, learning about the actual working condition of the bridge and evaluating the working performance and load capacity of the bridge structure in the serviceability limit states.

Analysis on Tower Crane under Wind Load by ANSYS

2012 ◽  
Vol 226-228 ◽  
pp. 35-38
Author(s):  
Yong Qiang Gu ◽  
Wen Feng Wang ◽  
Shao Dong Guo
Keyword(s):  
Preliminary Analysis ◽  
Wind Wave ◽  
Low Frequency ◽  
Fem Analysis ◽  
Wind Load ◽  
High Rise ◽  
Finite Element Software ◽  
Tower Crane ◽  
Set Up ◽  
A Company

With high-rise construction increasing in city, it demands more and higher-performance tower cranes. Damages by wind to the tall and towering structures are usually very serious, but these dangers are often hidden.The paper uses the finite element software ANSYS to set up the overall modeling of the TC6010 tower crane which is produced by a company, and carry on the FEM analysis effected by wind based on it . The paper obtains the data of the displacement response of the complete machine after exerting the wind wave, and has the preliminary analysis to the result. The results show that the tower crane is a low-frequency vibrating system and easy to cause the structure resonance, the crane tower may damage in the boom firstly under the action of wind load.

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