1. Member, ASCE
2. Prof., Dept. of Civ. and Envir. Engrg., Univ. of Houston, Houston, TX 77204-4791; formerly, Prof., Dept. of Civ. Engrg., Nat. Cheng Kung Univ., Tainan 701, Taiwan.
3. Res. Asst., Nat. Ctr. for Res. on Earthquake Engrg., Taipei 106, Taiwan.