In this paper, the structural performance of the prestressed concrete T-girder bridge with a newly proposed diaphragm transverse connections (DTCs) have been investigated. The DTCs are composed of diagonal braces and horizontal brace, and the braces are structural steel with square cross section. A series of simulations have been carried out to study the effectiveness of the proposed DTCs on enhancing the transverse connection of the prestressed concrete T-girder bridge. Load Model 1 in accordance with Eurocode 1 is considered in the simulations, which consists of tandem system and uniformly distributed loads (UDL system). The Von Mises stress of the DTCs has been checked and corresponding steel grade has been given. The force on the surface between the T-girder bridge and the proposed DTCs has been studied and detailed connection design has been given for both new bridge construction and existing bridge retrofitting. The simulation results show that the maximum deflection arises when the deck is fully loaded with the UDL system and with lane 1 centrally located on exterior girder, and the tandem systems are applied at midspan simultaneously. It is revealed that with the proposed DTCs installed at midspan, the maximum deflection of the prestressed concrete T-girder bridge reduces 12.8% in the most unfavorable load case. In all the discussed load cases, the Von Mises stress of the proposed DTCs is within the reasonable range and can be borne by normal steel material. Additionally, connection methods have been given for the DTCs’ application to new bridge and existing bridge. For the use of chemical anchor in existing bridge, the concrete and prestress tendons should be checked in case of any additional damage during the installing of the DTCs.

在本文中，研究了具有新提出的横隔板横向连接 (DTC) 的预应力混凝土 T 梁桥的结构性能。DTC 由斜撑和水平撑组成，支撑为方形截面的结构钢。已经进行了一系列模拟来研究所提出的 DTC 对增强预应力混凝土 T 梁桥横向连接的有效性。模拟中考虑了符合欧洲规范 1 的负载模型 1，它由串联系统和均匀分布的负载（UDL 系统）组成。已经检查了 DTC 的 Von Mises 应力并给出了相应的钢种。已经研究了 T 梁桥和拟议 DTC 之间的表面力，并为新桥梁建设和现有桥梁改造提供了详细的连接设计。仿真结果表明，当甲板满载 UDL 系统且车道 1 位于外梁的中心时，最大挠度出现，并且串联系统同时应用于跨中。结果表明，在跨中安装建议的 DTC 后，预应力混凝土 T 梁桥在最不利荷载情况下的最大挠度降低了 12.8%。在所有讨论的载荷情况下，所提出的 DTC 的 Von Mises 应力在合理范围内，可以由普通钢材承受。此外，给出了 DTC 应用于新桥和现有桥的连接方法。在现有桥梁中使用化学锚栓时，应检查混凝土和预应力筋，以防在安装 DTC 过程中出现任何额外损坏。