Study on the Effect of Blocks on Seismic Performance of Improved Multi-Ribbed Slab Structure

2013 ◽  
Vol 438-439 ◽  
pp. 1592-1596
Author(s):  
Kun Qian ◽  
Tian Xia ◽  
Jie Zhang ◽  
Quan Yuan
Keyword(s):  
Experimental Study ◽  
Elastic Modulus ◽  
Structural Analysis ◽  
Calculation Model ◽  
Horizontal Load ◽  
Characteristic Parameters ◽  
Restoring Force ◽  
Earthquake Action ◽  
Specific Section ◽  
The Ideal

In order to confirm the calculation model of multi-ribbed slab structure and transmission of earthquake action, this paper improved existing multi-ribbed slab structure. The calculation model of improved multi-ribbed slab structure confirmed the stress relationship among three seismic fortification lines, and the transmission of earthquake action became clear, the same calculation model could be applied in structural analysis. For studying the features of characteristic parameters of restoring force changing in the first seismic fortification line, blocks, and correcting the parameters, the experimental study was carried out. The experiment shows that when a unidirectional horizontal load was applied, that blocks in grid frame could be regarded as a slanted strut that with specific section and elasticity, the ideal slanted struts nominal elastic modulus is roughly in 20~60 N/mm2.

Study on the Effect of Outer Frame on Seismic Performance of Improved Multi-Ribbed Slab Structure

2013 ◽  
Vol 791-793 ◽  
pp. 330-334
Author(s):  
Kun Qian ◽  
Tian Xia ◽  
Jie Zhang ◽  
Quan Yuan
Keyword(s):  
Control Design ◽  
Calculation Model ◽  
Characteristic Parameters ◽  
Restoring Force ◽  
Braced Frame ◽  
The Third ◽  
Outer Frame ◽  
Variation Range ◽  
Earthquake Action ◽  
Similarities And Differences

This paper confirmed the calculation model of improved multi-ribbed slab structure and the stress relationship among three seismic fortification lines, offered the possibility of distributing earthquake action reasonably, provided the basis for optimal design. Comparing the similarities and differences between the improved multi-ribbed slab structure and energy-consumption braced frame; characteristic parameters of restoring force in the third seismic fortification line, outer frame, would be got by design and be adjusted. This paper analyzed the third seismic fortification line by numerical simulation and example analysis, the variation range of performance of the third seismic fortification line is got, this range can be adjusted by changing the influencing factors of three seismic fortification lines. The reasonable destruction mode of three seismic fortification lines could be achieved, namely the control design of three seismic fortification lines could be achieved.

Study on the Effect of Grid Column on Seismic Performance of Improved Multi-Ribbed Slab Structure

2013 ◽  
Vol 351-352 ◽  
pp. 910-914
Author(s):  
Kun Qian ◽  
Miao Wang ◽  
Jie Zhang ◽  
Quan Yuan
Keyword(s):  
Seismic Performance ◽  
Major Effect ◽  
Calculation Model ◽  
Sectional Area ◽  
Direct Proportion ◽  
Characteristic Parameters ◽  
Restoring Force ◽  
Steel Bar ◽  
Pushover Curve ◽  
Earthquake Action

In order to confirm the calculation model of multi-ribbed slab structure and transmission of earthquake action, this paper improved existing multi-ribbed slab structure. The calculation model of improved multi-ribbed slab structure confirmed the stress relationship among three seismic fortification lines, and the transmission of earthquake action became clear, the same calculation model could be applied in structural analysis. For studying the effect of characteristic parameters of restoring force changing in the second seismic fortification line on seismic performance, and correcting the parameters, this paper analyze push-over model of the second seismic fortification line to get the static pushover curve. According to the study, the amount of steel bar in grid column and sectional dimensions of grid beam made the major effect on characteristic parameters of restoring force in the second seismic fortification line. The growth of steel bar’s sectional area in grid framework and the yield strength are mainly in direct proportion. It is more reasonable that simultaneously alter steel bar’s sectional area in grid frame and dimensions of grid framework to adjust characteristic parameters of restoring force changing in the second seismic fortification line.

Study on the Effect of Grid Beam on Seismic Performance of Improved Multi-Ribbed Slab Structure

2013 ◽  
Vol 724-725 ◽  
pp. 1754-1758
Author(s):  
Kun Qian ◽  
Gui Yan Dong ◽  
Jie Zhang ◽  
Quan Yuan
Keyword(s):  
Yield Strength ◽  
Seismic Performance ◽  
Major Effect ◽  
Calculation Model ◽  
Characteristic Parameters ◽  
Restoring Force ◽  
Filling Materials ◽  
Yield Displacement ◽  
Pushover Curve ◽  
Earthquake Action

In order to confirm the calculation model of multi-ribbed slab structure and transmission of earthquake action, this paper improved the existing multi-ribbed slab structure. The calculation model of improved multi-ribbed slab structure confirmed the stress relationship among three seismic fortification lines, and the transmission of earthquake action became clear, this calculation model could be applied in structural analysis. For studying the effect of characteristic parameters of restoring force changing in the second seismic fortification line on seismic performance, and correcting the parameters of grid beam, this paper analyzed push-over model of the second seismic fortification line to get the static pushover curve. According to the study, the amount of steel bar in grid beam and sectional dimension of grid beam made the major effect on characteristic parameters of restoring force in the second seismic fortification line, concrete grade of grid beam is a unconsidered factor. Nominal elastic modulus of filling materials didnt much affect the yield strength and yield displacement of the second seismic fortification line, but made significant effect on post-yield strength.

Comparative Analysis on Seismic Response of Tall Building on Soft and Rigid Foundation

2011 ◽  
Vol 250-253 ◽  
pp. 2216-2220
Author(s):  
Xiao Yan Ni ◽  
Yu Zhang ◽  
Shi Bo Zhang ◽  
Wei Huang
Keyword(s):  
Elastic Modulus ◽  
Seismic Analysis ◽  
Time History ◽  
Horizontal Displacement ◽  
Calculation Model ◽  
Tall Building ◽  
Seismic Action ◽  
Rigid Foundation ◽  
Soft Foundation ◽  
Earthquake Action

A numerical calculation model of the dynamic response of a tall building -base- foundation system was built. In the modeling, the beams, columns and stakes was described by the BEAM188, and the floor slab described by the SHELL63. The natural frequency and mode of the vibration of the system were calculated by using ANSYS and the response of the system under both horizontal and vertical seismic action were calculated by using the module, Time-History Seismic Analysis, with the elastic modulus of foundation being set as 20MPa, 20GPa, and 30GPa respectively. The result shows that, the horizontal displacement amplitudes of the system were 0.198m, 0.095m and 0.095m respectively under horizontal seismic action, and were 1.13×10-5m, 1.4×10-11m and 1.4×10-11m respectively under vertical seismic action. So the structures on soft foundation take on stronger capacity of resisting vertical earthquake than that on rigid foundation, and the opposite is the case of resisting horizontal earthquake. The story drifts are respectively 6.2×10-12m, 2.34×10-6m and 3.46×10-6m under horizontal seismic action, and respectively 4.3×10-12m, 4.85×10-6m and 4.78×10-6m under vertical seismic action. The story drifts on soft foundation under both horizontal and vertical earthquake action are much less than that on rigid foundation.

Study of Seismic Design Method for Slope Supporting Structure of Soil Nailing

2013 ◽  
Vol 353-356 ◽  
pp. 2073-2078
Author(s):  
Tian Zhong Ma ◽  
Yan Peng Zhu ◽  
Chun Jing Lai ◽  
De Ju Meng
Keyword(s):  
Seismic Design ◽  
Calculation Method ◽  
Retaining Wall ◽  
Earth Pressure ◽  
Calculation Model ◽  
Soil Nailing ◽  
Case Record ◽  
Analysis And Design ◽  
Supporting Structure ◽  
Earthquake Action

Slope anchorage structure of soil nail is a kind of economic and effective flexible slope supporting structure. This structure at present is widely used in China. The supporting structure belong to permanent slope anchorage structure, so the design must consider earthquake action. Its methods of dynamical analysis and seismic design can not be found for the time being. The seismic design theory and method of traditional rigidity retaining wall have not competent for this new type of flexible supporting structure analysis and design. Because the acceleration along the slope height has amplification effect under horizontal earthquake action, errors should be induced in calculating earthquake earth pressure using the constant acceleration along the slope height. Considering the linear change of the acceleration along the slope height and unstable soil with the fortification intensity the influence of the peak acceleration, the earthquake earth pressure calculation formula is deduced. The soil nailing slope anchorage structure seismic dynamic calculation model is established and the analytical solutions are obtained. The seismic design and calculation method are given. Finally this method is applied to a case record for illustration of its capability. The results show that soil nailing slope anchorage structure has good aseismic performance, the calculation method of soil nailing slope anchorage structure seismic design is simple, practical, effective. The calculation model provides theory basis for the soil nailing slope anchorage structure of seismic design. Key words: soil nailing; slope; earthquake action; seismic design;

Embodying the culture of achievement: Culture between illness and perfection is a ‘thin line’ – obtaining the ideal female body as an act of achievement

2021 ◽  
pp. 1354067X2110040
Author(s):  
Josefine Dilling ◽  
Anders Petersen
Keyword(s):  
Experimental Study ◽  
Human Body ◽  
Female Body ◽  
The Body ◽  
Thin Line ◽  
Complex Processes ◽  
The Individual ◽  
Different Levels ◽  
The Ideal ◽  
Body Ideals

In this article, we argue that certain behaviour connected to the attempt to attain contemporary female body ideals in Denmark can be understood as an act of achievement and, thus, as an embodiment of the culture of achievement, as it is characterised in Præstationssamfundet, written by the Danish sociologist Anders Petersen (2016) Hans Reitzels Forlag . Arguing from cultural psychological and sociological standpoints, this article examines how the human body functions as a mediational tool in different ways from which the individual communicates both moral and aesthetic sociocultural ideals and values. Complex processes of embodiment, we argue, can be described with different levels of internalisation, externalisation and materialisation, where the body functions as a central mediator. Analysing the findings from a qualitative experimental study on contemporary body ideals carried out by the Danish psychologists Josefine Dilling and Maja Trillingsgaard, this article seeks to anchor such theoretical claims in central empirical findings. The main conclusions from the study are used to structure the article and build arguments on how expectations and ideals expressed in an achievement society become embodied.

Experimental study on thermal runaway characteristic parameters of parallel battery modules

2021 ◽  
Author(s):  
Lei Liu ◽  
Chunjing Lin ◽  
Peixia Yang ◽  
Nannan Kuang ◽  
Fang Wang ◽  
...  
Keyword(s):  
Experimental Study ◽  
Thermal Runaway ◽  
Characteristic Parameters

scholarly journals Study on a calculation model of infrared radiation characteristics of rocket engine plume

2021 ◽  
Vol 2125 (1) ◽  
pp. 012006
Author(s):  
Nan Wu ◽  
Chengpo Mu ◽  
Yang He ◽  
Huan Liu ◽  
Taiye Liu
Keyword(s):  
Flow Field ◽  
Infrared Radiation ◽  
Rocket Engine ◽  
Calculation Model ◽  
Characteristic Parameters ◽  
Infrared Band ◽  
Radiation Characteristics ◽  
Mid Infrared ◽  
Fast Calculation ◽  
Plume Flow

Abstract In order to study the infrared radiation (IR) characteristics of rocket engine plume in the mid infrared band, a calculation model for IR transfer of rocket engine plume was built. The flow field data are calculated by software FLUENT. Based on HITRAN database, the IR characteristic parameters are calculated after spectral line correction. The Line of Sight (LoS) is used to solve the radiation characteristics in the plume flow field, and the IR characteristics distribution of the plume in the mid infrared band is obtained, which agree well with the results from open literature. The method has the advantages of simple model, less parameters and fast calculation speed in this paper.

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