Experimental Study on Strength of Large Size Fillet

Abstract

Recently the large size fillet (L=19-25 mm) is used for building construction frequently. In generally, breaking strength of fillet is inclined to decrease in proportion as it's size inclease, but allowable stress of fillet is constant.
Test was then made to study above mentioned point. The number of specimens were 29. Those specimens were devided into Front Fillet and Side Fillet Specimens, and each fillet's size were ranging from 10 to 25 mm.
Test Result : Breaking strength increased compare with former tests. Breaking stress of large size fillet on both throat area, except or include penetration, were decreased. But average yield point on throat by Wire Straih Gauge were not various.
Maximum stress, at first, distributed on outside of fillet, but at yield point and breaking point it changed on inside.
We consider, then, the difference of strength by fillet size is due to the process from yield pt. to breaking pt. of fillet.