病态RC梁式公路桥的实用空间计算方法

A Practical Space CalculationMethod for the Morbid RC BeamBridges for Highway

在长期荷载作用下，ＲＣ构件的刚度将会随时间的延长而降低，主梁过大的挠度将会导致桥面下沉、桥面破损及行车不顺．更值得注意的是各主梁刚度不均衡降低以及很可能伴随发生的相应横向联结的刚度也不均衡降低，将给桥跨结构的空间工作状态带来极不利的影响，形成病态或恶化原有＂病情＂．对此，主要以主梁刚结桥面连续的体系为主要对象，阐述一种实用中间计算方法．

The rigidity of RC structures would reduce with time under long duration load. Theoverlarge deflection of the girder would cause the sagging and cracking of the bridge deck. Itis better worth to pay attension on that the unbalanced reduction of the rigidity and the unbalanced reduction of the diaphragm with which is probably accompanied would produce adverse effects on the space work state of the bridge span and cause morbidness or deterioratethe original morbidness.This paper puts forward a practical space calculation method for thesystem of rigid girder and continuous deck.