安全系数、荷载与抗力  

Factors of safety,loads and resistance

作　　者：李广信[1] 武立勇 

机构地区：[1]清华大学水沙科学与水利水电工程国家重点实验室,北京100084 [2]河北裕融地球物理勘查有限公司,河北廊坊065000

出　　处：《工程勘察》2017年第10期1-5,78,共6页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金项目(51279085);重点基础研究发展计划(973)项目(2013CB036402);水沙科学与水利水电工程国家重点实验室(2013-KY-4)

摘　　要：说明了安全系数的意义及应用,指出了安全系数法分析中的荷载与抗力的差别与划分的基本原则;并强调指出,在地基承载力验算中,如果埋深承载力系数Nq=1.0,则应当将基础两侧的超载γd从荷载中扣除,而不是将其放在极限承载力中,亦即此项作为抗力时不必除以安全系数。最后,通过几个例子说明在不同的问题中,荷载与抗力的确定是一个很复杂的问题。The meaning and application of the factor of safety are presented,and the difference between load and resistance in the safety factor method is demonstrated. It is pointed out that when the bearing capacity factor of embedment depth Nq= 1. 0,the overcharge γd should be a negative load which is not a part of the limit bearing capacity,that is as a part of resistance it should not be divided by the factor of safety. Some examples are given,and it is concluded that to regard a force（ or moment） as load or resistance in different problems is complicated.

关 键 词：安全系数 荷载 抗力 地基承载力 埋深的承载力系数 

分 类 号：TU46[建筑科学—结构工程]