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题18-20：某部分框支剪力墙结构，房屋高度45.9m。该建筑为丙类建筑，抗震设防烈度为7度，Ⅱ类建筑场地。第3层为转换层；纵横向均有落地剪力墙；地下一层板顶作为上部结构的嵌固端。
首层某剪力墙墙肢W1，墙肢底部截面考虑地震作用组合的内力计算值为：弯矩Mw=2900kN•m，剪力Vw=724kN。试问，W1墙肢底部截面的内力设计值，应最接近于下列何项数值?
A.M=2900kN·m，V=1160kN
B.M=4350kN·m，V=1160kN
C.M=2900kN·m，V=1050kN
D.M=3650kN·m，V=1050kN

A.9m。该建筑为丙类建筑，抗震设防烈度为7度，Ⅱ类建筑场地。第3层为转换层；纵横向均有落地剪力墙；地下一层板顶作为上部结构的嵌固端。
首层某剪力墙墙肢W1，墙肢底部截面考虑地震作用组合的内力计算值为：弯矩Mw=2900kN•m，剪力Vw=724kN。试问，W1墙肢底部截面的内力设计值，应最接近于下列何项数值?
A.M=2900kN·m，V=1160kN
B.M=4350kN·m，V=1160kN
C.M=2900kN·m，V=1050kN

【参考答案】

B
解析：由《高层建筑混凝土结构技术规程》第4.8.2条和第10.2.5条，首层剪力墙底部加强部位墙肢W1抗震等......

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Theft deterrent systemTo deter the vehicle theft, the system is designed to give an alarm and keep the engine from being started if any of the front, sliding and back doors and hood is forcibly unlocked or the battery terminal is disconnected and then reconnected when the vehicle is lockeD.The alarm blows the horn intermittently and flashes the headlights, tail lights and other exterior lights. The engine cannot be started because the starter circuit will be cut.SETTING THE SYSTEM1. Turn the ignition key to the 'LOCK' position and remove it.2. Have all passengers get out of the vehiclE.3. Close and lock the front, sliding and back doors and hooD.The indicator light will come on when the front, sliding and back doors and hood are closed and lockeD.As the front doors arc locked, the system will give you a preparation time of 30 seconds before the setting, during which the front, sliding and back doors and hood may be opened to prepare for the set- ting.Be careful not to use the key when opening either front door. This will cancel the system.4. After making sure the indicator light starts flashing, you may leave the vehiclE.The system will automatically be set after the preparation time elapses. The indicator light will flash to show the system is set. If any of the front, sliding and back doors and hood is opened at that time, the setting is interrupted until it is closed and lockeD.Never leave anyone in the vehicle when you set the system, because unlocking from the inside will activate (使起动) the system.WHEN THE SYSTEM IS SETActivating the systemThe system will give the alarm and cut the starter circuit under the following conditions:If any of the front, sliding and back doors and hood is unlocked without using the keyIf the battery terminal is disconnected and then reconnectedAfter one minute, the alarm will automatically stop with the starter circuit cut kept on.Reactivating the alarmOnce set, the system automatically resets the alarm each time the front, sliding and back doors and hood are closed after the alarm stops.The alarm will be activated again under the following conditions:If any of the front, sliding and back doors and hood is openedIf the battery terminal is disconnected and then reconnectedStopping the alarmTurn the ignition key from the 'LOCK' to 'ACC' position. The alarm will be stopped with the starter eircuit cut kept on. Stopping the alarm in this manner will keep the alarm from being reactivated when any of the front, sliding and back doors and hood is openeD.Interrupting the settingWith the system set, the back door can be opened with the key without activating or canceling the system. While it is open, the front and sliding doors and hood may be opened in addition, and the system can be activated only by the battery terminal disconnection.To resume the setting, close and lock the front, sliding and back doors and hooD.The back door must be closed with the key removeD.CANCELLING THE SYSTEMUnlock either front door with the key, or unlock the sliding door with the key when it has been closeD.This cancels the system completely and the starter circuit cut will be cancelled at oncE.INDICATOR LIGHTThe indicator light gives the following three indications when the system is in usE.When the light is:FLASHING—The system is set. You need the key to open the front, sliding and back doors and hooD.ON—The system will automatically be set when the time comes. The front, sliding and back doors and hood may be opened without a key.OFF—The system is inactivE.You may open any door and hooD.TESTING THE SYSTEM1. Open the driver's and front passenger's windows.2. Set the system as described abovE.The front doors should be locked wiA.YB.NC.NG
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