Applied Mechanics and Structures Research Unit Department of Civil Engineering Faculty of Engineering Chulalongkorn University Bangkok 10330 Thailand;
Department of Civil Engineering Faculty of Engineering Souphanouvong University Loungprabang 06000 Laos;
Department of Civil Engineering Faculty of Engineering Burapha University Chonburi 20131 Thailand;
Faculty of Civil Engineering Ho Chi Minh City of Technology and Education Ho Chi Minh 721400 Vietnam;