Design and Performance of Concrete Pile Strengthened with Lengthened Steel-Tube Core: Model Tests and Numerical Simulations

Figure 4

Pictures of test piles 1#∼4’#: (a) 1#, (b) 2#, (c) 3#, (d) 4#, and (e) 4’#.

(a)

(b)

(c)

(d)

(e)