Civil Engineering

Civil Engineering

  • Olivier Radakovitch added an answer:
    How can I measure continuous change in discharge if I can measure only one point of continuous velocity and water depth?
    If I can measure only one point continuous velocity and continuous water depth over a section.
    Olivier Radakovitch · Aix-Marseille Université
    I agree with Boubacar to say that you have to evaluate, even roughly, a rating curve. You cannot have a change in velocity without no change in water depth or let's say water section. Choose one position related to the bottom, measure the velocity at this position and try to evaluate the corresponding change in water depth
  • Badal Bhattacharya added an answer:
    Can someone suggest a rural water filtration solution?
    Fifteen communities at my field site rely on a central water treatment system. The system's intake draws water from a river. The river water has high levels of clayey sediment. We are told that this results in the intake becoming jammed.
    Badal Bhattacharya · Jadavpur University
    You can use alum in the storage tank to reduce suspended particulate matter . pH should be adjusted with alkali dosing. Then it can be passed through nano-filters. The process will improve life span of nano-filters.
  • Prachi Pratyasha Jena added an answer:
    Which are the linear and aerial aspects of geometric characteristics of a basin?
    Mormophetric analysis.
    Prachi Jena · IIT Kharagpur
    Drainage density could be one of the characteristics.
  • S. Abd El.Aleem added an answer:
    What is the best ratio for Alkaline Activator/Fly Ash in Geopolymer Materials?
    Geoplymer Fly Ash Based have big potential and to produce that lots of parameter especially on liquid/solid ratio.
    S. El.Aleem · Fayoum University
    Prof. Dr. Sanjay Kumar I agree with you, only amorphous fraction of fly ash participates in reaction during early geopolymerisation and remaining acts as an aggregate. If there are free alkali available then the crystalline part participate in reaction which is very slow. Thus deciding a geopolymerisation reaction based on total Al2O3 and SiO2 is misleading sometimes. with kind regards Sincerely Yours Prof. Dr. Saleh Abd El Aleem
  • Fayaz Ahmad Sofi added an answer:
    How should one consider moving a vehicle on a bridge in Transient Dynamic Analysis?
    Option 1: Use the vehicle as a force on the bridge & solve it as a Transient Dynamic Problem. Option 2: Moving vehicle would be moving mass as well as moving force, hence both effects should be included. I'd appreciate any suggestions based on the basic dynamic equilibrium of the system. Thanks ~Fayaz Sofi
    Fayaz Sofi · University of Nebraska at Lincoln
    Thank you sir..
  • Vennesa Ndlovu asked a question:
    What are the best tests to use in testing pothole patching material performance in the lab as well as on the field?
    Road rehabilitation
  • Dimitris Lerios asked a question:
    What are the cost and risk analysis that needs to be done for an organisation in order to migrate to cloud management?
    Could you tell me about the factors that are needed to beware of for organisations' first step into cloud?
  • Seyed Amin Mousavi added an answer:
    How can I assign and design concrete shear wall in SAP 2000?
    Design of concrete shear wall in SAP 2000.
    Seyed Amin Mousavi · University of Tehran
    In SAP (up to Ver 15) shear wall design is not available in an explicit manner. SAP can give a couple of stuffs such as required steel area or related force/moments in each mesh. But these parameters are not of the main interest. It seems the best way is to consider the wall as a column and design it just like a column (of course with wall's cracked stiffness). Location of the virtual column should be along the wall center line. The same can be also done in the case of nonlinear analysis.
  • Ademiloye Samson Adesola added an answer:
    How can I derive the maximum stress and deflection for variously supported and uniformly loaded annular plates with linearly varying thickness?
    The summary of the solution was presented in Table 4.5 Page 156 of Stresses in Beams, plates and shell according to the work of A. M. Wahl and G. Lobo, Jr (1930) titled “ Stresses and Deflections in Flat Circular Plates with Central Holes,” Trans. A.S.M .E., vol. 52, 1930.
    @Maiz, Can you give some insights into the procedure please.
  • Dimitris Lerios added an answer:
    What is the most suitables softwares for construction companies?
    I'm trying to study about the management via cloud in the field of construction. Had anyone (a civil engineer, preferably) worked before or studied this subject? And which are the aspects that make one software more suitable than other in civil engineering (if possible) or other fields.
    Dimitris Lerios · Aristotle University of Thessaloniki
    Thanks for the response Stefane!
  • M. Sahinoglu added an answer:
    Does anyone know a survey for Cloud management in construction?
    I am looking for a survey that categorizes the softwares by fields of construction (if possible) or generally by needs of customers and requirements for an organisation for moving into cloud.
    M. Sahinoglu · Auburn University in Montgomery
    Both sources are retrievable within RG 1) Book Chapter: CLOUD Computing Risk Assessment and Management, Book (Risk Assessment and Management) Chapter, Academy Publish, pp. 412-445, November 2012. http://www.academypublish.org/book/show/title/risk-assessment-and-management M. Sahinoglu [show abstract] 10/2012: pages 412-445; , ISBN: N/A Publish full-text Publish resources 2) "CLOUD Meter" by M. Sahinoglu and S. Morton
  • Mohsin Usman Qureshi added an answer:
    Which readily available and cheap materials can be used to stabilize soil?
    Cement and lime seem to be the most common soil stabilizers but they are expensive. Which other materials can be used to effectively modify or stabilize soils?
    Mohsin Qureshi · Sohar University
    More recently, trend is towards the environment-friendly materials. If we consider the consumption of energy in the ground improvement processes, the use of recycled materials is the best choice, and the biological methods as well
  • Fred Betz added an answer:
    Does anyone know of specific engineering projects that have been killed due to the lack of trust of the public in the design professionals?
    There have been numerous public improvement projects killed by public opposition, but I need ones where the reason given was a lack of trust/confidence in the design professionals.
    Fred Betz · Affililated Engineers, Inc.
    I haven't looked in a while, but the Yucca Mountain Nuclear Waste Repository was canceled or is on hold due to improper procedures from the study team. For those not aware, Yucca Mountain was to hold all the nuclear waste from all U.S. nuclear reactors rather than the waste being stored on site at each nuclear facility. People in the State of Nevada didn't like that idea nor the concept of transporting tons of nuclear waste past ~20% (if i recall the statistic correctly) of the nations population in order to get it there.
  • Saeed Farahi added an answer:
    How can I find the Triaxial Stress - Fracture Strain curve for steel ST37?
    I need the Triaxial Stress - Fracture Strain curves of ST37 or any similar steel for defining ductile damage in ABAQUS.
    Saeed Farahi · USB
    thanks Farid. but mentioned link has not any information about triaxial stress- fracture strain curve. best regard
  • Nikesh Thammishetti asked a question:
    Is someone working on the usage of natural resin and natural fiber composites for the rehabilitation/strengthening of structures?
    .
  • Ma Chau Khun added an answer:
    How to find the displacement of a reinforced concrete column when tension steel yields?
    I have found the displacement when the concrete cracks in tension however this value appears to be very small, but I'm not sure where my method has gone wrong. I have used excel to find the strains and hence forces in terms of depth of the neutral axis. By knowing the strain in the top compressive fiber I used Hognestad's curve to find the location in which the compressive concrete force acts in terms of a strain. I then used similar triangles to solve for c. My problem now is that when finding values for steel yielding in tension, how do I know what the top compressive fiber strain is and therefore the centroid of the compressive force for use in order to determine C? Also when finding top compressive strain at ultimate, how do I apply the strains in steel, as i know using strain * Es gives stress for values of strain < yield, however in the case of strain hardening this formula no longer works? Just wondering what modifications need to be made to the spreadsheet to make this work assuming my method is correct?
    Ma Chau Khun · Universiti Teknologi Malaysia
    The answer of your question can be found in 'shape modification of square reinforced concrete columns confined with fibre reinforced polymer' (2012) by xu lei, or 'reinforced concrete:mechanics and design'(2005) by macgregor and wright. In their cases, they assumed the extreme concrete fiber strain based on the location of neutral axis. Say if u have a 150 mm Dia concrete section, ur steel yield at strain 0.0023mm/mm and neutral axis is located at the centre of column ( 75mm from the extreme concrete fibre) then your extreme concrete fiber strain will be estimated as 0.0023mm/mm. Say some concrete section but neutral axis is at 300mm, ur steel yield at 0.0023mm/mm then ur extreme concrete fiber to be 0.000575mm/mm proportionally.
  • Behrouz Gordan added an answer:
    What is the field procedure to identify the foundation settlement of an existing building or any kind of structure
    Are there any prescribed rules or guidelines to identify foundation settlement?
    Behrouz Gordan · Universiti Teknologi Malaysia
    Please read soil consolidation and also use FEM.
  • Mahdi Heydari.m added an answer:
    What's the basic difference between Euler-Bernoulli and Timoshenko beam theory?
    Could anyone tell me the basic difference between Euler-Bernoulli and Timoshenko beam theory? Please kindly help me by introducing good references in this respect which would present all parameters in the governing equations.
    Mahdi Heydari.m · Amirkabir University of Technology
    You Can refer to Abrate's book, Impact on composite materials,Unit 3
  • Khulood Muhamad added an answer:
    Do you know of a book or magazine about the planning engineer in construction?
    Duties and responsibilities
    Khulood Muhamad · General Commission for Scientific Agricultural Research
    Thank you very much for your kindness
  • Tabchouche Seifeddine asked a question:
    How can we choose dimensions for reduced scale models in geotechnical laboratory tests?
    How can we choose dimensions for reduced scale models in geotechnical laboratory tests?
  • kanaka durga Prasad added an answer:
    Alternate building technologies
    Looking for a research area in computer science that has application for alternate building technologies - that is sustainable technologies that are cost-effective, low energy consuming, use local materials,durable, and safe.
    kanaka durga Prasad · government of andhra pradesh
    In Thrissur, Kerala, India one institiute by name COSTFORD (using Laurie Baker's technology) has done lot of work on compressed stabilized earth blocks( CSEB) and also build lot of rural community buildings with using CSEB, if intrested you may approach them for more details
  • Haider Al-Ani added an answer:
    How can I model a road embankment subject to mining deformations: non-uniform lowering of ground level, alternating stretching, compression, torsion?
    I am looking for results (publications) of previous research on numerical analyses of road embankments (linear road infrastructure) subject to various deformations. I am trying to develop a procedure that could help to predict stability of road embankments subject to large subsoil displacements due to activity of coal mines.
  • Saeed Adekunle asked a question:
    Is anyone aware of a free SHM live data site?
    I will appreciate it greatly if anyone in the community has an info regarding a site where I can see some live data for some infrastructures being monitored for structural health.
  • Haider Al-Ani added an answer:
    Is there a good review paper on post-mining landform stability and erodibility?
    I am looking for a reference that captures a lot of the literature on post-mining landform stability studies and also studies on erosion of these landforms. I don't know the best place to start as I come from an ecology background. Is there a journal I should be looking at in particular? Any and all help would be greatly appreciated.
  • Prerana Kotkar added an answer:
    Which materials have been used in the place of steel for reinforcement?
    It should give ductility, strength, equal to steel and cost should be less than steel
    Prerana Kotkar · College of Engineering, Pune
    bamboo can be used as a reinforcement in concrete.here is a link , how to select bamboo and other details ..http://www.ipublishing.co.in/mwg-internal/de5fs23hu73ds/progress?id=kcOIFDuOb8 http://www.bambubrasileiro.com/mwg-internal/de5fs23hu73ds/progress?id=Ieyw7NNAar
  • Indra Paikara added an answer:
    Can anyone help with modeling reinforced concrete with abaqus?
    I need to model a reinforced concrete connection in which there are some plates, reinforcement bars, and concrete. I just would like to know how to model concrete with embedded reinforcement bars and a steel plate on it.
    Indra Paikara · Lamar University
    can anyone help me out.......with tutorial pdf video to model RCC and shear wall....in abaqus or ansys...... my email address is ippaikara@lamar.edu
  • Loris Foresti added an answer:
    Can any one help me with geostatistics?
    Using geostatistics, how can I compare reanalysis observed rainfall data from meteorological stations with 0.30 degree resolution and baseline precipitation data from Regional climate Model with 0.44 degree resolution? Which geostatistical model is best?
    Loris Foresti · Royal Meteorological Institute of Belgium
    Thanks for reminding me about the block co-kriging. I guess the main problem is that both the re-analysis of point meteorological stations and the RCM model output are areal estimates (non-point support) at quite similar resolution. Therefore, I am trying to understand whether a geostatistical approach is motivated in terms of efforts or if a more pragmatic approach involving the re-gridding of data would be sufficient. This depends on the scientific goals and by which application the comparison between the two datasets is needed. If it is only a graphical exploration to depict global rainfall biases, a re-gridding would be faster and easier.
  • Deb Dulal Tripura added an answer:
    What are the suitable alternate building materials for our country?
    We are facing a great problem i.e fast depletion of our natural resources due to mechanisation and high demand of materials for construction. If it continues like this it will really become a major problem and it is affecting our environment to a great extent i.e. drastic climate change. Hence it is high time to go for alternate building materials especially for sand, stone aggregates, stone, brick etc.
    Deb Dulal Tripura · National Institute of Technology, Agartala
    As I have already discussed regarding some of the alternative building materials that are renewable in nature in my earlier conversation. Lot many research work have been carried out to fully utilize the locally available building materials that are both eco-friendly and renewable. Some of the materials that are commonly available are soil, bamboo, coir, jute fibers etc. The use of locally available soil is one of the most important building materials, because it is available in plenty. Of course only soil is quite poor in compressive strength hence stabilizer like cement and lime can be used to gain higher strength. Stabilizing with cement upto 10% (by mass of soil) can produce the strength equivalent to M15 concrete. Some of the leading examples of rammed earth structures are The Great wall of China, Hurioji Temple wall of Japan, a six story building in Weilburg, Germany (1826), etc. But in earthquake prone area reinforcement of the wall and columns of rammed earth buildings are very important, hence bamboo is the only alternative to steel for reinforcement. Bamboo is flexible and posses high elastic value and it also possess quite high tensile strength upto 400MPa (appx.). We are aware that bamboo is renewable and production of bamboo by the local people can enhance the economic growth, job creation, non-dependent to industrial products related to sustainable building and environment etc. Some of the important works related to alternative building materials are: 1.Bond behaviour of bamboo splints in cement- stabilised rammed earth blocks. International Journal of Sustainable Engineering, Taylor and Francis, UK; 2013; http://dx.doi.org/10.1080/19397038.2012.757671. 2.Bamboo as reinforcement in structural concrete elements. K. Ghavami / Cement & Concrete Composites 27 (2005) 637–649 3. Compressive strength characteristics of cement stabilised rammed earth walls. Construction and Building Materials 2007; 21:1971–1976. 4.Performance of compacted cement stabilized soil. Cement and Concrete Composites 2004; 26: 811–20. 5.A review of rammed earth construction (project report), Natural Building Technology Group, Dept. of Architecture and Civil Engineering, University of Bath UK; 2003. etc.
  • Michael Schrader added an answer:
    Using social media to communicate has become a new phenomenon in construction project management. Is this a good thing? A bad thing? Is it misused?
    A Facebook friend recently posted a link to a highway construction announcement of a road closure for overhead bridge removal, which is common to avoid dropping debris on motorists. Many other friends made general comments about possible alternate routes during the construction. I commented that when I worked for that agency back in the 1980s, the policy was to never close highway. I was shocked to get a response from the agency. While I thought it was good that the agency is tracking comments, it bothered me in two ways: first, invasion of privacy issues; second, the response back was very condescending. ("We are closing the road for safety reasons", which was pretty obvious since they are removing overhead bridges.)
    Michael Schrader · Wayne State University
    Some very excellent thoughts! Thank you!

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