In my experience most civil engineering organisations use spreadsheets for the majority of design calculations. Some large organisations even still insist on engineers writing out calcs by hand. For example, a calculation that determines whether or not a retaining wall is of sufficient size more often than not will be completed in excel. Ditto with the calculation that checks the weight bearing capability of a column or beam in a large building.

Bespoke tools will be bought for tasks too complex or important for excel - finite element analysis, problems involving non-linear springs etc. Some time-consuming, repetitive tasks may also be deemed worthy of more automated tools, but on the whole the engineering industry is very much in the dark ages when it comes to modern software approaches. I often wonder what you'd end up with if you introduced a team of computer scientists into a civil/structural engineering company and told them to assist with analysis. I imagine you'd get some pretty innovative approaches to concept screening/design/cost-optimising etc.