Abstract
A comparative study of the costs of structure was made with brief structural calculations and cost estimates by varying the areas of classroom and the methods of structural framing of 3 to 6-story reinforced concrete school buildings. 44 examples on Type I which have the inner walls designed as the anti-seismic wall, and another 12 examples on Type II which are not designed with such walls. Generally speaking, the cost of reinforced concrete structure for school buildings becomes less as the area of classroom becomes larger. In case of Type I, 4-5-story Plan A, 3-5 story Plan B, and 3-story Plan C are the most inexpensive amonong each type. On the other hand, 6-story buildings in each type are the most expensive. Comparing the 7×9 meters classroom of 4-story schools. Plan B and C are 6% and 12% respectively more in comparison to Plan A, and the ratio of cost in respect to the height of building is only 2%. In case of 7×9 meters classrooms of Type II, 4-story school is the cheapest, but the 6-story is the most expensive. The cost difference in respect to the height of building are as follows. Plans A and B, 1%, Plan C, 3%. Plan C is 4-5% more than Plans A and B. Since Type II must resist the earthquake load only by the rigid frame, without the anti-seismic wall reinforcements like Type 1, approximately 20 to 40% more steel will be required.
