>>11336715
I'm going to try to back of the envelope this for a bit, please correct errors as appropriate.
https://www.wired.com/2015/08/ufc-fighter-ronda-rousey-physics-based-superpowers/
>This is a speed of about 5 m/s.
I do not at all trust this metric for the energy transferred. I am also not going to assume that a giantess assault on a mech will use the minimal sportswomanly force involved in a nonlethal boxing match. Instead, let's consider our giantess to have planted her left foot and launched a FINAL ATTACKU: HEART CRUSHA PUNCHU, beginning in the quads, transferring half of her bodymass into the blow focused at her fist, with an impact velocity scaled linearly. A 5'7" 135lb rouseylike turned 30 foot, 20,942 lb giantess lands a 27 m/s blow, carrying ~5 short tons. mv^2=9500kg * 27 m/s * 27 m/s = 6.9255 MEGAjoules. That is an absolute fuckton of joules. Maybe this situation would call for torque reading instead I dunno how punches work. All the perforation calculations I see online relate to cylindrical diameters, people typically only really hit with about half of their fist area, let's assume a ~1.5" diameter under normal conditions scales linearly to a giantess punch diameter of ~8", 0.2m.

So, how much concrete could this motivated superdelinquent perforate with such a mighty fisting?
According to this paper:
https://www.ccsenet.org/journal/index.php/jmr/article/download/5020/6703
>E(cp)/ (fc)(d^3) = 0.174(H/d)^3 + 0.169(H/d)^2 + 0.0577(H/d) + 0.2969 for (0.69 ≤ H/d ≤ 14.86)
I don't believe that we're going to get the depth to diameter ratio specified.
Assuming unconfined compressive strength of 60MPa for concrete:
6.9255MJ/60MPa(0.008 cubic m) = 0.174(H/0.2m)^3 + 0.169(H/0.2m)^2 + 0.0577(H/0.2m) + 0.2969

14131.1=1.392(H^3) + 6.76(H^2) + 288.5(H)

Non-negative: 17.2488 meters concrete perforation.
She's only a bit more than 9 meters tall.