scholarly journals Role of Position of Shear Wall in Reducing Torsion & Storey Displacement in an Irregular Building

2020 ◽  
Vol 9 (1) ◽  
pp. 2475-2479
Keyword(s):  
Dynamic Analysis ◽  
Shear Wall ◽  
Soil Conditions ◽  
Test Model ◽  
Seismic Zone

The paper elaborates the study of effects of location of shear wall in an irregular shaped building. The main concerned issue is the generation of torsion in a building which is irregular in plan. The paper points out the causes, effects and solution of the torsional forces in an irregular shaped building. The study is done on an ‘L’ shaped building which G+10 storied and is located in Seismic Zone IV exhibiting medium soil conditions and a damping of 5%. The modelling and analysis will be performed by using CSI ETABS ver.16. Dynamic Analysis is conducted in order to study the topic. The paper will finally point out the reasons for choosing a particular test model which exhibits lowest torsion and storey displacement.

scholarly journals Comparison of Static and Dynamic Analysis of Multi-Storied Building

2021 ◽  
Vol 9 (VIII) ◽  
pp. 441-444
Author(s):  
Arati Avinash Sabale
Keyword(s):  
Dynamic Analysis ◽  
Bending Moment ◽  
Shear Wall ◽  
Seismic Zone ◽  
Building Structures ◽  
Static And Dynamic Analysis ◽  
Time Period ◽  
Gravity Load ◽  
Local Geology ◽  
A Site

Vibration of ground is the main cause of earthquake damage to building structures. There are many factors responsible for the strength of earthquake shaking at a site including the earthquake's magnitude, the site's proximity to the fault, the local geology, and the soil type. The natural disasters have been fast recurring all over the world causing great concern and damage to man and their properties. Among these disasters Earthquake is an endogenous natural disaster, which occurs suddenly without any warning. The vast devastation of engineering systems and facilities during the past earthquakes has exposed serious deficiencies in the prevalent design and construction. Shear wall is one of the most commonly used lateral load resisting in high rise buildings. Shear wall can be used to simultaneously resist large horizontal load and support gravity load. In the study, one tall RCC building of 13 stories is assumed to be situated in seismic zone V is analysed using two methods (Static and Dynamic Analysis). The share walls are taken at different position of building. The comparison of the different shear wall models is studied in this work against the different parameters like time period, bending moment, shear force, storey drift, displacement

The Seismic Response of 1/4-Scale Frame — Supported Reinforced Masonry Shear Wall

2008 ◽  
Vol 400-402 ◽  
pp. 725-730
Author(s):  
Liang Huang ◽  
Xiang Gao ◽  
Chu Xian Shi ◽  
Sheng Yun Chen
Keyword(s):  
Seismic Performance ◽  
Economic Value ◽  
Shear Wall ◽  
Test Model ◽  
Seismic Zone ◽  
Earthquake Excitation ◽  
Damage Degree ◽  
Reinforced Masonry ◽  
Masonry Shear Wall ◽  
Pseudodynamic Testing

The study of this paper focuses on the seismic performance of a new complex tall building-FSRMW (frame-supported-reinforced-masonry-shear-wall).The new structure combines the advantages of RMW (reinforced-masonry-shear-wall) and FSRCW (frame-supported- reinforced- concrete-shear-wall) and have good economic value and extensive use value.Big space can be gained by using the structure, which provide a new appropriate selection for the design of hotel, multifunctional office building and dwelling house with shop at bottom. Substructure pseudodynamic testing were adopted to carrying out the seismic testing of 1:4 Reduced-scale models of FSRMW.Seismic evaluation of this structure has been carried out by substructure pseudodynamic testing of 1/4-scale specimen.The dynamic response of the tested structure under the influence of earthquake excitation is analyzed.The horizontal bearing capacity and the damage degree of the test model are investigated. The testing are cited to illustrate that the seismic performance of the structure(frame-shear-wall-supported reinforced masonry shear wall) is better than that structure(frame- supported reinforced masonry shear wall) and can be satisfied with the design request of 6-8 degree seismic zone.

scholarly journals Richness of Rhizosphere Organisms Affects Plant P Nutrition According to P Source and Mobility

Agriculture ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 157
Author(s):  
Jean Trap ◽  
Patricia Mahafaka Ranoarisoa ◽  
Usman Irshad ◽  
Claude Plassard
Keyword(s):  
Careful Consideration ◽  
Soil Conditions ◽  
Organic P ◽  
P Nutrition ◽  
Soil P ◽  
P Acquisition ◽  
Complex Interactions ◽  
Experimental Trials ◽  
The Relationship

Plants evolve complex interactions with diverse soil mutualist organisms to enhance P mobilization from the soil. These strategies are particularly important when P is poorly available. It is still unclear how the soil P source (e.g., mineral P versus recalcitrant organic P) and its mobility in the soil (high or low) affect soil mutualist biological (ectomycorrhizal fungi, bacteria and bacterial-feeding nematodes) richness—plant P acquisition relationships. Using a set of six microcosm experiments conducted in growth chamber across contrasting P situations, we tested the hypothesis that the relationship between the increasing addition of soil mutualist organisms in the rhizosphere of the plant and plant P acquisition depends on P source and mobility. The highest correlation (R2 = 0.70) between plant P acquisition with soil rhizosphere biological richness was found in a high P-sorbing soil amended with an organic P source. In the five other situations, the relationships became significant either in soil conditions, with or without mineral P addition, or when the P source was supplied as organic P in the absence of soil, although with a low correlation coefficient (0.09 < R2 < 0.15). We thus encourage the systematic and careful consideration of the form and mobility of P in the experimental trials that aim to assess the role of biological complexity on plant P nutrition.

Epidemiological problems. Soil and epidemics. Experimental evidence supporting a causal relationship between soil conditions and the onset of epidemics

1935 ◽  
Vol 31 (3-4) ◽  
pp. 533-533
Author(s):  
Н. Lotze
Keyword(s):  
Experimental Evidence ◽  
Causal Relationship ◽  
Soil Conditions

A. advocates the theory of Pettenkofer about the role of soil in the emergence of epidemics.

scholarly journals Dynamic Analysis on RCC and Composite Structure for Uniform and Optimized Section

2021 ◽  
Vol 9 (12) ◽  
pp. 1114-1127
Author(s):  
Ankit Kumar
Keyword(s):  
Dynamic Analysis ◽  
Composite Structure ◽  
Composite Structures ◽  
Response Spectrum ◽  
Steel Structures ◽  
Seismic Zone ◽  
Dead Weight ◽  
Conventional Concrete ◽  
High Rise ◽  
Time Period

Abstract: This study examines the composite structure that is increasing commonly in developing countries. For medium-rise to high-rise building construction, RCC structures is no longer economical due to heavy dead weight, limited span, low natural frequency and hazardous formwork. The majority of commercial buildings are designed and constructed with reinforced concrete, which largely depends on the existence of the constituent materials as well as the quality of the necessary construction skills, and including the usefulness of design standards. Conventional RCC structure is not preferred nowadays for high rise structure. However, composite construction, is a recent development in the construction industry. Concrete-steel composite structures are now very popular due to some outstanding advantages over conventional concrete and steel structures. In the present work, RCC and steel-concrete composite structure are being considered for a Dynamic analysis of a G+25-storey commercial building of uniform and optimized section, located at in seismic zone IV. Response Spectrum analysis method is used to analyze RCC and composite structure, CSI ETABS v19 software is used and various results are compared such as time period, maximum storey displacement, maximum storey stiffness. Maximum storey shear and maximum stoey overturning moment. Keywords: RCC Structure, Composite Structure, Uniform Section, Optimized Section, Shear Connector, Time Period, Storey Displacement, Storey Shear, Storey Stiffness, Response Spectrum method, ETABS

Farmland transfer and agricultural economic growth nexus in China: agricultural TFP intermediary effect perspective

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Yuan-pei Kuang ◽  
Jia-li Yang ◽  
Meseret-Chanie Abate
Keyword(s):  
Economic Growth ◽  
Agricultural Economic ◽  
Test Model ◽  
Promoting Effect ◽  
Content Type ◽  
Effect Model ◽  
Intermediary Role ◽  
Multidimensional Effects ◽  
The Impact

PurposeThe multidimensional effects of farmland transfer in China have been profoundly unstudied. The purpose of this paper is to provide insights on the effects of the intermediary role of agricultural total factor productivity (TFP) of farmland transfer on agricultural economic growth in China.Design/methodology/approachBased on the agricultural data of 30 provinces in China over the period 2005–2018, this paper uses the intermediary effect model to test the relationship between farmland transfer, agricultural TFP and agricultural economic growth. This paper employed an intermediary effect test model to investigate the intermediary role of agricultural TFP in the influence of farmland transfer on agricultural economic growth.FindingsThe findings indicated that farmland transfer has a significant effect on promoting agricultural economic growth. There is a significant “inverted U-shaped” relationship between farmland transfer and agricultural TFP. The sample value of 84.3% of farmland transfers in China is still within the TFP promoting effect range. In addition, farmland transfer has an indirect impact on agricultural economic growth through the channel of agricultural TFP. Agricultural TFP plays a significant intermediary role, but the effect is relatively lowOriginality/valueThis paper is the first to provide fundamental evidence on the impact of farmland transfers on agricultural economic growth in China, driven by agricultural TFP as an intermediary factor. Agricultural TFP can reduce the involution effect of farmland transfer and promote an indirect effect on agricultural economic growth.

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