Analysis Of Stress At Anchorage Zone Of Self-Anchored Suspension Bridge

Self-anchored suspension bridge is increasingly popular for its elegant appearance and adaptability to geological and topographic conditions. Now this type of bridge is applied to more and more medium and small-span bridges in cities, even large-span bridges over rives.The main characteristic of self-anchored suspension bridge is the main cable anchor in the stiffening girder and the force of the main cable will be transmitted to the stiffening beam. Therefore, the force condition of the stiffening girder of self-anchored suspension bridge system is more complex than that of earth-anchored suspension bridge,specially the anchorage zone of self-anchored suspension bridge. Because it's not only to bear the live load directly, also to bear the great horizontal axis force and uplift force which is transmitted by the main cable. for the reason that the anchorage components for the cable is very complicated and the stress distributions of anchoring system is difficult to grasp accurately. So a safe and reliable anchor is one of key to self-anchored suspension bridge design. As construction of the self-anchored suspension bridge is too few in domestic and international and the literature for the anchoring system of main cable is also very lack, so research on the anchorage zone is very necessary.The following tasks have been completed in this thesis:1 .The correlative information about self-anchored suspension bridges at home and abroad is collected and studied, and structure forms ,stress features and typical anchorage structures are summarized.2. Based on Qingshuihe self-anchored suspension bridge in city of Chengdu, author discuss the tress distributions of anchorage zone in self-anchored suspension bridge and the software ANSYS is used to analyze the anchoring of Qingshuihe bridge relatively detailed. Finally, combined with the physical model tests of the anchorage zone, author provide a basis for the reasonable bridge design, and also provide a reference to the anchorage zone design of the self-anchored suspension bridge in the future.