EARTHQUAKE RESPONSE STUDY OF MULTI-STORIED RCC BUILDING WITH FVD ON SLOPING GROUND

Damping performs essential function in format of earthquake resistant structures, which lower the change of the shape when they are subjected to lateral loads or earthquake. In the existing study fluid viscous dampers (FVD) are used to consider the response of RCC buildings on sloping ground. The important challenge of a structure is to endure the lateral loads and switch them to the foundation and to control the story displacement. In order to make structure earthquake resistant, (FVD) have been used. The building is modeled in ETAB 2018 and modeled with different location of FVD. After the study results show building with fluid viscous dampers (FVD) at diagonal bracing shows better performance.

Lateral force-displacement response of buried pipes in slopes

A series of full-scale experiments were conducted to estimate lateral soil constraints on the pipes buried in dense sandy slopes at different burial depths. The experimental data indicated that the soil force on the pipe increases with increasing the slope grade and burial depth ratio. The lateral soil force versus relative pipe displacement response observed from the experiments is presented and compared to those arising from level ground conditions. The study was extended to larger burial depth ratios by simulating pipes under sloping ground conditions using a numerical (finite element) model that was initially calibrated using the results from physical modelling. The findings from the study in terms of the variation of peak lateral soil restraint as a function of the slope grade and burial depth ratio are presented for consideration in pipeline design.

Literature Review on Interaction Analysis of Building Resting on Sloping Ground

An increase in economic growth, as well as urbanization in the hilly areas, encourages the construction in the hilly region. Considering this fact the engineers should assure the safety of constructions in the slopy region. To understand the past attempts carried out on the constructions of the building on the slopy ground the systematic literature survey is done which includes the parameters like types of the building suitable for hilly regions, slope inclinations for safe superstructure in seismic events, types of safety measures recommended to assure the safety of superstructure and necessity of interaction analysis for the constructions in the hilly region. The survey so carried out in the paper gives a fair idea about the research gap and thus motivates researchers to carry out future research on the gap identified. Keywords: soil-structure interaction; slopy ground; bracing system; literature survey; equivalent static analysis; hilly region constructions.

3D Modelling, GIS Mapping and Planning for Pipelines

Govt. of India in association with Oil & Gas Sector industry exclusively developing the pipeline network in various part of the country to cater the requirement of demand centers /industries, as India is considered as developing country and having tremendous opportunities for the pipeline transportation sector. There are different type of challenges in route planning and finalization of optimum, safe and constructible pipeline route which includes challenges like rugged terrain, landslide, steep sloping ground, extreme weather condition like flash flood, snow fall, intense summer, environmental sensitivity, major development etc., wherein normal survey procedure does not applicable. Therefore, it is recommended to use latest modern technology of survey i.e. 3D Modelling Survey using 0.3m/0.4m High Resolution Stereo Satellite Image followed by developing up-to-date GIS Base map using Digital Elevation Model (DEM) and GIS Database with the help of rapid field validation and ortho-rectifications through photogrammetry process.

Herbivory and misidentification of target habitat constrain region-wide restoration success of spekboom (Portulacaria afra) in South African subtropical succulent thicket

Restoration of degraded subtropical succulent thicket, via the planting of Portulacaria afra (spekboom) truncheons, is the focus of a public works programme funded by the South African government. The goals of the programme, which started in 2004, are to create jobs, sequester carbon, restore biodiversity, reduce erosion, improve soil water holding capacity and catalyse private sector investment for upscaling of restoration. Here we report on a region-wide experiment to identify factors that can improve project success. Measures of success were survivorship and annual aboveground biomass carbon sequestration (ABCsr) of spekboom truncheons some 33–57 months after planting—starting in March 2008—into 173 fenced plots (0.25 ha) located throughout the global extent of spekboom thicket vegetation. We also collected data for 18 explanatory variables under the control of managers, and an additional 39 variables reflecting soil physical and chemical characteristics and rainfall patterns post restoration, all beyond the influence of managers. Since the latter covariates were available for only 83 plots, we analysed the two data sets separately. We used a prediction rule ensemble to determine the most important predictors of restoration success. There was great variation in percentage survivorship (median = 24, range = 0–100%) and ABCsr (median = 0.009, range = 0–0.38 t C ha−1 yr−1). The model using management variables explained less variance (53%) in survivorship than the model incorporating additional soil and rainfall covariates (62%). ABCsr models were better fits (78 and 88% variance explained, respectively). All model configurations identified browse intensity as a highly influential predictor of restoration success. Predicted success was highest for plots located in target habitat; however, only 45% were thus located, suggesting the need for expert input and habitat modelling for improving target habitat identification. Frost exposure was another important predictor influencing all models but was likely a consequence of locating sites off target habitat. Sites planted on equatorward slopes during the warm season showed reduced carbon sequestration, possibly due to elevated soil moisture stress associated with high radiation loads. Physiographic factors associated with improved restoration success were location on sloping ground (reduced frost exposure), increasing longitude (more warm-season rainfall) and increasing latitude (less frost coastwards). Few trends were evident among post-restoration climatic factors beyond the control of managers. Higher rainfall during the year post restoration had a negative impact on carbon sequestration while higher rain during the early months post restoration had a positive effect on both carbon sequestration and survivorship. Soil factors showed little importance for the survivorship model, whereas silt content, % K and Mg CEC emerged as predictors of carbon sequestration. Our results have direct relevance for improving the success of landscape-scale restoration projects envisioned for the ca. 8,930 km2 of degraded spekboom thicket.

Seismic Analysis of RCC and Steel Building on Sloping Ground

It is necessary to design and analyse a structure to perform well under seismic loads and also endow with well strength, stability and ductility for seismic design. The seismic performance of high rise steel frame and RCC frame structure is analysed by equivalent static method. The advancement in building, Information, modelling has integrated design, detailing, and fabrication of steel which will result in high performance under earthquake loading. In present work various models were analysed with the help of Staad pro. And the results so obtained were plotted and compared.

Seismic Analysis of Building Resting on Sloping Ground

In India, for example, the north-east states. The scarcity of plain ground in hilly areas compels construction activity on sloping ground resulting in various important buildings such as reinforced concrete framed hospitals, colleges, hotels and offices resting on hilly slopes. The behavior of buildings during earthquake depends upon the distribution of mass and stiffness in both horizontal and vertical planes of the buildings. Various models were analyzed using staad pro. after all result and comparison it is found that buildings with set back and step back patterns give more stable pattern during earthquake.