2015/9/22 Outline 2.I Introduction Chapter 2 2.2 Site 2.3 Seismic Checking For Subsoiland Foundation Site,Subsoil and Foundatior 2.4Soil Liquefaction 国 2.I Introduction super they all have foundations. M Q:Ho do? 大七大杠 2.2 Site (1)Favorable to earthauake resistance 2.2.I Selection of construction site Steady bedrock stiff soit deme and homoreneou medium-stiff soil in a wide open area w-42015/9/22 1 Chapter 2 Site, Subsoil and Foundation 2015/9/22 熊海贝，同济大学土木工程学院 xionghaibei@tongji.edu.cn 1 2.1 Introduction 2.2 Site 2.3 Seismic Checking For Subsoil and Foundation 2.4 Soil Liquefaction Outline 2015/9/22 熊海贝，同济大学土木工程学院 2 xionghaibei@tongji.edu.cn 2.1 Introduction Subsoil Building Response Site Masonry buildings, Concrete buildings, Steel buildings and super complicated tall buildings, no matter what kinds of the structural system and different material components, they all have foundations. Earthquake Foundation  Under earthquake action, the building may uplift on one side/corner, even more, may overturn. 2015/9/22 熊海贝，同济大学土木工程学院 xionghaibei@tongji.edu.cn 3  In a seismic environment, there may exist a potential for ground failures.  It is obvious that if the ground fail beneath a structure, the structure could be severely or totally damaged. Q: What we can do? Q: How to do? 2015/9/22 熊海贝，同济大学土木工程学院 xionghaibei@tongji.edu.cn 4 2.2 Site 2.2.1 Selection of construction site Identification of ground sections • Favorable to earthquake resistance • Unfavorable to earthquake resistance • Hazardous to earthquake resistance 2015/9/22 熊海贝，同济大学土木工程学院 xionghaibei@tongji.edu.cn 5 (1) Favorable to earthquake resistance: Steady bedrock; stiff soil; dense and homogeneous medium-stiff soil in a wide open area 2015/9/22 熊海贝，同济大学土木工程学院 xionghaibei@tongji.edu.cn 6