Analysis on caculating the cracking of big diameter bi-steel concrete beam;

Owing to its series of advantages such as simple technology and good economic benefit, bi-steel has been widely used in various buildings in our country.

This paper presents detailed experimental study and ANSYS nonlinearfinite element analysis of flexural performance of concrete sandwich two-waypanels reinforced by bi-steel.

This paper compares the basic anchorage lengths of the plain steel-bar and the deformed bar,analyzes on the reasons why the basic anchorage length of the deformed bar is longer,and puts forward the correction coefficients of the basic anchorage lengths under different conditions of the actal engineering.