Driving life mining virus killing tool

1.

RA=RG= 0.4ql+1.35P ;

RC=RD=1.1ql+2.15P

calculation of support reaction force: static equilibrium can be used for simply supported beams, that is, the equation ∑ f = 0 in the vertical direction, and ∑ M = 0 for hinge joints, and force method or displacement method should be used for statically indeterminate continuous beams and rigid frames. The calculated vertical force is fulcrum reaction, and the specific calculation of each support reaction is the calculated fulcrum vertical force divided by the number of supports

extended data:

static calculation method is to calculate the foundation reaction under column load, and then directly calculate the internal force of each section under column force and net foundation reaction. Relatively speaking, the calculation is simpler than the inverted beam method. The essence of statically determinate analysis method is to treat the foundation beam as an independent beam with great stiffness, ignoring the joint work of the upper structure and the lower foundation, and ignoring the connection between the upper columns

the inverted beam method regards the stiffness of column and superstructure as infinity on the premise that the foundation beam has enough stiffness, which exaggerates the binding force of column on the foundation beam

The static determinate analysis law ignores the binding force of columns and superstructure on the foundation beam. In practical engineering, the superstructure is mostly between the two. Therefore, in the calculation, if the upper stiffness is considered to be larger, the inverted beam method should be used

When the upper stiffness is small, the static analysis method should be used; When the stiffness is medium, these two methods can be used for analysis and adjustment. If necessary, we can also draw the internal force envelope diagram from the two results. Of course, the safety is higher

2. It is suggested to take the platform. If you don't take the platform, there is no guarantee for yourself. If you have problems in the later stage and need to return, it will be very troublesome. It belongs to personal private transaction, and if there are problems, the platform side can't intervene

3. After all, it's better to go to the platform. How to say, at least there is a transaction record, which will make you feel at ease. As for whether it's a liar, it's not necessarily. The other party may not want to pay for the platform.

4. It's better not to cross the platform to collect money. Because idle fish is the buyer received the goods, confirmed after the receipt of the money to the seller's account, so as to ensure the interests of both parties. If you pay in private, it's hard to protect your rights in case the buyer doesn't receive the goods or has any disputes. So try to choose trading on the platform.

5. Sell mobile phone you cash on delivery, don't give the goods first and then the money, it's not safe

6. Second hand things, which have been tested face to face, should not be returned, because the other party does not know whether they understand the computer or not, and whether they broke it ring the day is not certain, so they can not be returned. To say the least, even if they are returned, they have to suffer losses. It is impossible to return the original price

7. I'm not sure
it's not convenient to test the plane in front of the courier, or even not allowed to test the plane
at the same time, if there is a dispute, there will be no interim ruling.

8. Although you have paid for it,
there is no indication that it has been sold
the page has not been refreshed yet,
not so fast.

9. Unknown_Error

10. What currency did you buy? Where did you buy it? After you change your mobile phone, you can retrieve it by retrieving your mobile phone number. Most websites or software support mobile phone retrieval