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Thanks. I didnt know that. Therefore assigning basic loads (DEAD,LIVE,EQ and wind) will be enough and load combinations will be done automatically. thanks again

Dear civilungo Thanks for your reply. I was able to define a load combination as you mentioned. My problem is how to assign this load combination to the structure? Thanks in Advance

ETABS has an "Auto Select selection list" which could be assigned to objects lke beams and columns. This list is based on American standrads for steel structures. I do live in a country where I want to use to German standrad (DIN) for steel sections. What can I do? 1- Is it possible to carry out...

I find "Load Combination" command under define menue. Now my problem is how to assign these load combinations to the building?

Sorry if this is a simple question, but I am new to ETABS. In analysing a building after defining the loads (dead, live, wind and earthquake, we also have to define load combinations and choose the sever case for each element based on these load combinations. How can I define load combinations...

ETABS Nonlinear v8.1.5 Define Static Load Case Names For live load, there are two options in “type”. One is live and another is reduce live. What is the difference between them?

In order to model soil behavior, I need to be able to use a Mohr-Coulomb model. I am not sure if it could be done in SAP or not. I havent checked with its manual yet but a colleague recommended to use a geotechnical software like PLAXIS.

Dear Cousink Thanks for your data, but I do not live in USA. Also I am a design engineer with carrer in design of buildings. I am studying for design of tunnels. The overall process is same for calculation of stresses and strains but I am looking for guideline or standrad to specify the loads...

I am not in charge of cost calculation, so I dont know. Sorry. If chance arises I will ask PIC.

Thanks for all replies. Tunnel alternative This is already fixed due to feasibility studies by a consulting firm. It is 30 Km with 5.5 m dia. Most part of the profle goes through granite and therefore an open TBM is suggested (which needs more elboration and detail study). Tunnel cross section...

I am planning to analyze a tunnel with 5.5 m diamtere and 30 km length for two directions: longitudinal and cross-section for earthquake loads. It may be necessary two models one without concrete segments as linng and the second without lining. Is it possible to use SAP2000 for this purpose?

Thanks for your reply. The site you refered me to, is about piping, but I am looking for tunnel information. Annual amount of water to be transmitted is 800,000 ,000 cubic meter. Topography of the site doesn&t allow the pipe alternative. So we are looking for a tunnel solution.

What are the commercial softwares for stress-strain calculation of water transmitting tunnels? Is it possible to use SAP (Structural Analysis Program) for these calculations? In other words is it possible to model the soil-structure interaction in SAP?

I would like to know what are the European and American standards for design of Water transmitting tunnels? By tunnel I mean an underground structure with a diameter of about 5 meter and 30 km length. Is there any specific and independent standards written for these structures? Also I would like...

Dear cvg Thanks. I know this phrase but this is not a word. In my language there is only one word expressing this phrase, named: Debi, might have forigen origin. Isn't there a single word to express it in English?

Aquestion from Hydraulic Engineering What is the appropriate English word to describe: Amount of water in time unit Its unit is: M3/second

It is mentioned in a Japanese book titled seismic design methods, (limit state design method) that: Modal Analysi for Time-History method will be used when the damping matrix in differential equation of motion is a proportional damping. What is the meaning of proportional damping? Also will be...

I am looking for a complementry book which makes it easier to understand UBC 97. I have found following three books. I have to choose one from them. I woud like to know your opinion on them. 1st book Uniform Building Code: Code Applications Manual (Hardcover) Product Details Publisher: Intl...

Could you please introduce some resources (books or sites, sites is prefable) which discusses the time history analysis in detail. Mostly I want to know what is the philosophy of UBC in this regard.

Is there any site, explaining basic civil engineering words like, stud, joist, tie, strap and etc?