问题 单项选择题

力矩分配法中的分配弯矩等于()。

A.固端弯矩

B.远端弯矩

C.不平衡力矩(即附加约束上的力矩)乘以分配系数再反号

D.固端弯矩乘以分配系数

答案

参考答案:C

解析:

力矩分配法中有四种弯矩:(1)固端弯矩:由外荷载或非荷载因素引起的杆端弯矩;(2)分配弯矩:将结点不平衡力矩反号以后乘以分配系数所得到的弯矩;(3)传递弯矩:将分配弯矩乘以传递系数所得到的弯矩;(4)杆端弯矩:将各杆端的固端弯矩与历次分配弯矩与传递弯矩相加即为各杆端的最后弯矩。因此,选项(C)正确。

[点评] 本题考察力矩分配法中分配弯矩的概念,要注意区分上述四种不同的弯矩及其相应的计算方法。

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It does not have to be January 1st to give yourself a chance to make the most out of your day. Every day is a new day and a fresh start to learn, grow, develop your strengths, free yourself from past regrets or hurts, and move forward older and wiser. Every day gives you a chance to reinvent (重新审视) yourself. It is never too late to change things that are not working in your life.

Each day is a new beginning and a piece of blank paper. How would you like to create your day? What would you like to paint on it? If you wake up in a negative mind, you are more likely to paint a dark picture throughout the day, and your picture will not show hope, happiness and joy.

If you take each day to think actively, and have a positive intention(意图) for how you would like to create your day, how would your life be different? What can daily positive intentions do for you? Every day you will give yourself the gift of an “attitude of gratitude(感恩)”.

Each day is a chance to look at things in a different way. You can experience each day in the beauty of the world-and the beauty of you who are in it! You find yourself changing from “I can’t” to “I can”. With a focus on positive intentions, you feel you are full of power and more like a “winner” than a “loser”.

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小题1:The first paragraph mainly tells us     .

A.We should make every day a new start.

B.January 1st is the most important day.

C.Learning is helpful in reinventing ourselves.

D.We needn’t change ourselves at all.小题2: If you have daily positive intentions, you will     .

A.get a positive result

B.have a busy life

C.get gifts from others

D.be a complete loser小题3:From the passage we can learn that     .

A.past regrets or hurts can make you older and wiser.

B.think actively and you will be a winner, not a loser.

C.the present is not where you should live for ever.

D.positive intentions for each day are of great help.