简述确定结构地震作用的底部剪力法和振型分解反应谱法的基本原理和步骤？ 

8度、9度抗震烈度设计时，高层建筑中的（）和（）结构应考虑竖向地震作用。

OR指令的作用是: 。( )

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

（）, or drum is used for hauling in or letting out the wires or ropes which will fasten the ship to the shore.

A salvor may be（）the whole or part of the payment due under Salvage Convention to the extent that the salvage operations have become necessary or more difficult because of fault or neglect on his part or if the salvor has been guilty of fraud or other dishonest conduct.

The （） is used for hauling in or letting out the wires or ropes.

Vessels must be（）valid certificate of nationality or certificated of registry or license.

在结构抗震设计中，框架结构在地震作用下（　　）。

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

国家标准〈砌体结构设计规范〉（GB50003-2001）中考虑了墙梁组合作用，底部框架-抗震墙砌体结构的钢筋混凝土托墙梁是否可以考虑共同作用对地震作用进行折减？

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。