摘要
A new type of rigid connection of steel girder and reinforced concrete pier of a bridge is proposed. The components in rigid connection are installed by high strength bolts on the spot, which are very convenient in construction. The moment from superstructure can be effectively transferred to substructure, and the plates provided for shear transferring can withstand the majority of total horizontal force. With static cyclic loading test, useful experimental data is obtained on the new type of connection of steel superstructure and concrete substructure. As a result, the stress transfer mechanism of the rigid connection can be made clearly and the seismic performance of this structure can also be clarified. Compared computed strength and ductility with actual results, it can be found that this type of connection has good energy absorption capacity in spite of large displacement and no local buckling arises at the locations where stress concentration occurs. Because of doing away with the expensive bearing, this new type of composite structure can be expected to construct a bridge with high seismic resistant capacity thus saving in total construction cost.
提出了一种新型的桥梁钢梁与钢筋混凝土桥墩的刚节点联结形式 .刚节点内部构件间的连接全部采用高强度螺栓连接方式且施工方便 ,能够较理想地将上部结构弯矩传递到下部结构 ,剪力传递钢板承受了大部分的水平剪力 .通过静荷载反复试验获得了有关这种新型结构性能方面的有效数据 ,试验结果表明该结构内部应力传递路径明确 ,并具有良好的抗震性能 .有关结构的强度和塑性变形的计算及试验结果均表明 ,这种结构即使在发生很大变形的情况下 ,也能保持良好的能量吸收功能且没有出现因应力集中而发生的局部曲屈现象 .由于避免使用了价格昂贵的支座 ,采用这种新型组合结构形式不但具有良好的抗震性能 。
