TAXIING TFC; AN SMA; SUFFERED ACFT DAMAGE IN AN ENCOUNTER WITH A STANCHION DURING A TXWY EXCURSION.

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AROUND XY00 PM THIS DATE I HAD COMPLETED MY FAMILIARIZATION CHKRIDE IN A BAY AREA AERO CLUB WITH MY CFII. AFTER CLRING THE RWY; I TAXIED TO TIE DOWN THE ACFT. TURNING INTO THE TRANSITION STRIP BTWN THE TXWY AND THE RAMP; MY RPM WAS ABOUT 800 AND I HAD A STRONG DIRECT XWIND FROM THE L. THIS ESSENTIALLY MADE RUDDER CTL ALONE INEFFECTIVE. I STEPPED ON THE L BRAKE AND NOTHING HAPPENED. I INSTINCTIVELY STEPPED ON BOTH BRAKES AND THE CRAFT VEERED TO THE R HDG TOWARD A PARKED GASOLINE REFUELING TRUCK. SIMULTANEOUSLY; I STEPPED HARD ON THE R BRAKE PEDAL; PULLED THE THROTTLE ALL THE WAY BACK; AND ANNOUNCED TO MY INSTRUCTOR THAT I HAD A BRAKE PROB. INSTANTLY; THE ACFT RESPONDED TO THE R; MISSED THE TRUCK; RAN OFF THE TRANSITION STRIP INTO THE GRASS; AND; AFTER TURNING APPROX 120 DEGS; THE L WING STRUCK A METAL STANCHION THAT THE SKYDIVING CLUB HAD ERECTED IN PREPARATION FOR A FORTHCOMING FLY-IN. THE STANCHION RAKED THE UNDERSIDE OF THE WING AND PENETRATED THE SKIN. WE PULLED THE AIRPLANE BACK ON THE ASPHALT TRANSITION STRIP WITH A HANDBAR. THE INSTRUCTOR GOT BACK INTO THE ACFT AND; AS I PULLED THE CRAFT WITH THE HANDBAR; HE TESTED THE BRAKES TWICE. THE L PEDAL; AS I HAD EXPERIENCED IT; TRAVELED ALL THE WAY DOWN TO THE FIREWALL WITH NO RESISTANCE ON BOTH TESTS. IT IS IMPORTANT TO NOTE THAT PRIOR TO MY CHKRIDE; AFTER STARTING THE ENG AND LEAVING THE TIEDOWN SPOT; I REVVED THE ENG AND TESTED THE BRAKES AND FOUND THEM TO BE FUNCTIONAL. AFTER TOUCHDOWN WHEN TURNING L ONTO THE TXWY; THE L BRAKE WAS FUNCTIONAL AT THAT TIME (THE L BRAKE HAD TO BE USED SINCE THERE WAS A STRONG WIND FROM THE L).