Experimental Research on the Mechanical Properties of MURSP-Type Steel-Concrete Composite Beams in Negative-Moment Region

To verify the effectiveness of uplift-restricted and slip-permitted (URSP) connectors in alleviating crack formation negative-moment region steel-concrete composite beams (SCCBs) improve engineering adaptability URSP connectors, this paper proposes a modified (MURSP) connector. Static load tests theoretical analysis were conducted on two overhanging with MURSP ordinary studs to analyze influence different stud forms deflection, crack, slip SCCBs region. Finally, nonlinear finite element modeling method for MURSP-type was developed, model established. The results showed that use could effectively alleviate concrete cracking problem zone SCCBs. Compared common SCCB, SCCB higher, maximum width lower, distribution more uniform; however, overall flexural stiffness beam reduced by 3.08%. interface increased suddenly initial stage loading, whereas increase gradual later stage. established study good agreement experimental beams. connector exhibited stress deformation states SCCBs, changed from bending type shear type.