How to calculate the transmission performance
The dowel bar refers to the round steel bars arranged in the middle of the slab thickness every certain distance along the transverse joint of the cement concrete pavement. One end is fixed in one side plate, and the other end can slide in the adjacent side plate. Its function is to transfer traffic load between two road slabs and prevent platform staggering, increase stress transfer between adjacent concrete blocks, so as to prevent uneven settlement of concrete pavement caused by large local stress on concrete pavement, and transfer stress to make adjacent concrete blocks bear stress together
the equipment is also used to detect 23 joints of two cement pavement sections in Illinois, USA. here, the evaluation standard of this paper is used to summarize the joint dowel deviation of North Hei Expressway and Illinois, USA. The following conclusions can be drawn from the comparison:
(1) compared with foreign high-quality construction level, DBI construction technology is still in its infancy in China, and the dowel bar deviation control technology needs to be improved
(2) the horizontal movement deviation leads to the unacceptable level of the dowel bar, which is 0% in the United States and 1.8% in the North black highway, indicating that the horizontal movement deviation can be well controlled by DBI process
(3) the longitudinal movement deviation leads to the unacceptable level of the dowel bar, which is 1.1% and 5.6% respectively in the United States and North black highway, and the proportion between the unacceptable level and the acceptable level is 12.4% and 29.3% respectively. The longitudinal movement of the dowel bar is closely related to the position of the slit
the general practice is that one end of the dowel bar is embedded in the middle of the pavement concrete (1 / 2 of the length), and the other end is covered with a sleeve when the concrete is poured and tamped
the main function of the dowel bar is to prevent the pavement on both sides of the expansion joint from sinking. The function of casing is to improve the damage of pavement caused by thermal expansion and cold contraction
generally, the dowel bar is round steel. The distance is about 50. It is explained in detail in the specific design< br />
http://www.ldstruc.com/simple/index.php?t22772.html
http://co.163.com/forum/content/1729_ 281072_ 1. HTM
if you still don't understand, there's nothing I can do
3dmark series test software has high requirements for graphics card and system, and can be used to detect whether there are quality problems in graphics card
3dmark: test the display subsystem of the system and its support for D3D, run benchmark to test the performance of the graphics card, and run demo for a long time to test the stability of the graphics card<
sysmark: system performance test software, including Internet content creation (network creation application test) and office activity (office application test), gives a test score by simulating the operation of some daily software
Super PI: test the CPU performance, and evaluate the CPU performance according to the calculation time<
winbench: winbench is a test software to investigate the performance of PC graphics, disk, processor and video subsystem in Windows environment. It includes the following test items: commercial graphics winmark 99, commercial disk winmark 99, high-end graphics winmark 99, high-end disk winmark 99, cpumark 99 / FpU winmark, etc<
Winstone: a very professional and strict overall performance testing software, which is composed of two parts: business Winstone and content creation Winstone. They are tested and scored by simulating and running the current representative application software. The former focuses on simulating the operation of daily commercial office software such as Microsoft office, Corel WordPerfect suite and lotus smartsuite, while the latter focuses on the operation of web page and multimedia software such as Photoshop, Macromedia director, Dreamweaver and Netscape Navigator, and measures their testing process, so as to get a total test score<
sisoft Sandra: the overall test and analysis software of the system, which is usually used to test the performance of CPU, disk and memory
viewperf: OpenGL performance test software for graphics card
in addition, quake III and other games will also be used for testing.
MV test graphics card and CPU is absolutely accurate, and powerful, low configuration PC can not run this software
download address:
http://dl.pconline.com.cn/html_ 2/1/60/id=50436&pn=0.html
Need to download the corresponding mobile app? The memory of mobile phone is too laggy. If you download and proce APP of two-dimensional code, it may be very stuck. You can download the two-dimensional code making software on the Internet and make the two-dimensional code you want in the two-dimensional code making software. In the QR code, click the QR code button on the left, draw the QR code style on the canvas, double-click the QR code, click the Modify button in the graphic properties data source, manually input the information to be edited, and click Edit OK to make the QR code
The specific steps of making QR code generator are as follows:
1. First, open wechat and click to open the "applet" option in wechat discovery
Network: QR code generator, search a lot! Hope to adopt ~ thank you
remember to ask for beans!