Prospective authors should submit an abstract in English of up to 300 words related to the theme topics. The work in a proposed paper shall be original and has not been published elsewhere. Abstracts and papers shall be submitted to Miss WH Zhou (Assistant and email: cemodel@polyu.edu.hk) c/o, the Department of Civil & Structural Engineering, The Hong Kong Polytechnic University, Kowloon, Hong Kong.