Department of Engineering Mechanics Shijiazhuang Tiedao University Shijiazhuang 050043 China;
Department of Engineering Mechanics Shijiazhuang Tiedao University Shijiazhuang 050043 China;
Department of Civil Engineering The University of Akron Akron OH 44329 USA;
Department of Engineering Mechanics Shijiazhuang Tiedao University Shijiazhuang 050043 China;