▁Hong ▁Kong . ▁ ▁A ▁ 1 ▁to ▁ 8 0 ▁scale ▁section ▁model ▁of ▁the ▁deck ▁in ▁the ▁ere ction ▁stage , ▁and ▁a ▁ 1 ▁to ▁ 4 0 0 ▁scale ▁full ▁a ero el astic ▁model ▁of ▁the ▁entire ▁bridge ▁were ▁constructed . ▁It ▁is ▁a ▁Monte - Car lo ▁simulation ▁of ▁the ▁ty ph oon ▁wind ▁climate . ▁The ▁full ▁model ▁was ▁tested ▁in ▁different ▁stages ▁of ▁construction ▁in ▁tur bul ent ▁boundary ▁layer ▁flow , ▁complete ▁with ▁the ▁local ▁top ography ▁to ▁model ▁the ▁wind ▁conditions ▁at ▁the ▁site . ▁The ▁model ▁tests ▁identified ▁critical ▁stages ▁of ▁ere ction ▁that ▁allowed ▁the ▁construction ▁schedule ▁of ▁the ▁bridge ▁to ▁be ▁tail ored ▁to ▁avoid ▁the ▁ty ph oon ▁season . ▁The ▁comparison ▁of ▁model ▁test ▁results ▁and ▁the ▁full ▁scale ▁monitoring ▁will ▁assist ▁engine ers ▁to ▁better ▁understand ▁the ▁behaviour ▁of ▁long ▁span ▁brid ges ▁in ▁wind ▁and ▁to ▁improve ▁current ▁design ▁methods . ▁ ▁Major ▁components ▁▁ ▁There ▁is ▁one ▁tower ▁located ▁on ▁W ok ▁Tai ▁W an ▁of ▁T sing ▁Y i ▁side ▁and ▁another ▁on ▁a ▁man - made ▁island ▁ ▁off ▁the ▁coast ▁of ▁Ma ▁W an . ▁Both ▁to wers ▁are ▁ ▁above ▁sea ▁level ▁and ▁founded ▁on ▁relatively ▁shall ow ▁bed rock . ▁The ▁to wers ▁are ▁two - leg ged ▁with ▁tr uss es ▁at ▁intervals , ▁in ▁the ▁form ▁of ▁portal ▁beam ▁design . ▁The ▁legs ▁were ▁constructed ▁with ▁high - str ength ▁concrete ▁of ▁ 5 0 ▁M Pa ▁(