Yafei Ma

Title: Yafei Ma: Innovator in Prestressed Concrete Technology

Introduction

Yafei Ma is a distinguished inventor based in Hunan, China. He has made significant contributions to the field of civil engineering, particularly in the area of prestressed concrete technology. With a total of three patents to his name, Ma's work focuses on enhancing the durability and performance of concrete structures.

Latest Patents

One of Yafei Ma's latest patents is titled "Method and system for predicting corrosion fatigue life of prestressed concrete bridges." This invention discloses a method and system for predicting the corrosion fatigue life of prestressed concrete bridges. It predicts the corrosion level of the strand to obtain the residual tension force of a structure. A stress concentration factor is integrated to consider the stress concentration effect caused by pitting corrosion. Additionally, a growth model of the elastic stress of the strand under the coupled effect of corrosion and fatigue is proposed. A growth model of the plastic stress of the strand is established using a cross-section loss of the strand as a fatigue damage parameter based on a degenerated elastic modulus of the concrete after fatigue. Failure criteria for the concrete, the strand, and a longitudinal tension bar are defined, forming a comprehensive set of methods for analyzing the life of a prestressed concrete bridge subjected to corrosive environments and fatigue loads.

Another notable patent is "Prestressed bailey beam for reinforcement and construction method therefor." This invention describes a Bailey beam for reinforcement composed of Bailey panels, stiffening rods, bolts, anchor bolts, a prestressing tendon, and anchorages. All components of the Bailey beam are prefabricated in a factory and assembled on-site. The prestressing tendon is arranged in the lower chord of the Bailey beam and anchored to the stiffening rods at both ends. During prestress tensioning, the Bailey beam slides towards both ends, resulting in an inverted arch structure that closes up cracks and decreases downward deflection. After completing the prestress tensioning, sealing is performed by fixing fillers, a sealing steel plate, and injecting solidifiable materials.

Career Highlights

Yafei Ma is affiliated with Changsha University of Science and Technology, where he continues to contribute to research and development in civil engineering. His innovative approaches have garnered attention in the academic and professional communities.

Collaborations

Some of his notable coworkers include Lei Wang and Jianren Zhang, who have collaborated with