Combination of Thermal Difference Loading and Snow Loading

K

km69

New Member
Hello Friends, As it is seen in the report of a sample project that I downloaded from the forum, analyzed in Ideacad, the situation where the temperature is positive and the snow load are not combined together. The load situation where the temperature is negative and the snow load are combined together. My question is, the temperature difference in the combinations automatically given by the program. Which article of the regulation is based on the fact that the snow load is not combined with the positive load? Note: Regulation AISC-360-10 (LRFD)
 
Hello there; Meanwhile, if the temperature difference is (+), it is assumed that there will be no snow in case of heating and expansion of the building for t> 0. Therefore, it is not combined with snow. Otherwise, considering the climate of the country, the design will be made under the influence. If you want to take this effect into account other than the automatically generated installation combinations, you can use a user-defined combination. Good work.
 
First of all thank you for the reply. If T>0, can't we base the assumption that the snow load is not taken on an article or comment in the regulation? We can interpret that snow load will not be taken when T> 0, but is it necessary to make a reference to this issue?
 
After all, the program makes automatic combinations according to certain assumptions. Do we know where the program is referring to when making this admission?
 
Hello there; Below are images from different regulations. There is no additional explanation about the subject mentioned in these regulations. This application we have done in the program is to produce a solution in a situation where the regulations are not very clear and clear, while producing a project, in a way that will prevent it from being in an unsafe area, but in an area that is too safe and therefore uneconomic. While producing this solution, auxiliary features are added in order to be able to solve the engineers' own project-specific situations or engineering interpretation differences. Your question is to add this user defined combination in it. 1- ASCE 7-16 2- ÇYTHYEDY (YDKT) 3- TS 500
 
ASCE 7-16, at the beginning of article 2.3.4, said "Where the structural effects of T are expected to adversely affect structural safety or performance". That is, if it is expected to adversely affect performance and safety... he says. Similarly, the TS500 wrote that "it should be taken into account when such effects cannot be neglected". In this case, if we are logical, it would not make much sense to include a combination such as "the building has warmed up, expanded, but there is also a snow load on it", as it is not expected to snow in summer, as Nurgül Hanım wrote.
 
Thanks for your interest guys. As you have stated, it will not snow in case of + temperature difference :) We know this. So when it snows, the structure will shorten instead of lengthening, and in this case, snow and + temperature will not be in a combination. I wanted to ask if it is. It seems that there is no clear article or comment on this subject.
 
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