落地支架法施工斜拉桥张拉方法研究
发布时间：2018-07-24 11:36
【摘要】：斜拉桥是一种拉索体系桥梁,是目前大跨桥梁结构的主要桥型之一。现代斜拉桥凭借着极大的跨越能力、极具美学价值的外形、非常合理的受力体系,在不到百年时间内一跃成为现代桥梁建设工程中广受青睐、颇具竞争力的桥型之一。20世纪80年代末,我国建成上海南浦大桥,一跨过江,长达423米,是我国第一座达到四百米跨度的斜拉桥。现如今,我国跨度超过400米的斜拉桥的数量已有59座,超过全球总数的一半,稳居世界第一。斜拉桥有许多优点,其主要特点是可通过改变斜拉索索力来改变整个桥梁体系的受力情况。斜拉索提供给主梁弹性支撑,而索力则可按需求进行调整。也正因如此,斜拉桥拉索的张拉问题非常重要,不论是在设计阶段还是施工阶段都必须进行精确的计算、准确的测量及合理的调整。本论文以某落地支架法施工斜拉桥实际工程为研究背景,对该桥拉索进行了研究,具体工作内容主要包括：1)总结了斜拉桥合理成桥索力的几种计算方法,利用有限元分析软件建立该斜拉桥模型,并计算合理成桥索力。2)论述了施工中常用的索力控制方法,并提出合理的施工控制方案,即二次张拉到位法。3)针对该大桥施工实际情况,对其索力调整方法进行了深入的研究,提出基于状态差别的索力调整方法,该方法不考虑施工过程,只将调索前后桥梁状态进行对比,求得由于索力变化所引起的塔、梁位移,进而一次完成锚杯拔出量的计算索力调整方法,并对其可行性进行理论及公式推导验证。4)对施工中几种索力测量方法进行介绍,详细说明应用频率法测量该桥索力的具体方法。
[Abstract]:Cable-stayed bridge is a kind of cable system bridge, and is one of the main bridge types of long span bridge structure. Modern cable-stayed bridge, with its great span ability, aesthetic value and reasonable force system, has become a great favor in modern bridge construction project in less than a hundred years. At the end of 1980s, Nanpu Bridge in Shanghai was built in China. Once it crossed the river, it was 423 meters long. It was the first cable-stayed bridge with 400 meters span in our country. Today, the number of cable-stayed bridges over 400 meters in China is 59, more than half of the global total, ranking first in the world. Cable-stayed bridge has many advantages, the main characteristic of which is that the stress of the whole bridge system can be changed by changing the cable-stayed cable force. The cable provides elastic support for the main beam, and the cable force can be adjusted according to the demand. For this reason, the cable tension of cable-stayed bridge is very important, both in the design stage and in the construction stage, must carry on the accurate calculation, the accurate measurement and the reasonable adjustment. Based on the actual construction of cable-stayed bridge by a landing support method, this paper studies the cable of the bridge, the concrete work content mainly includes: 1) summarizes several calculation methods of rational cable force of cable-stayed bridge. Using the finite element analysis software to establish the cable stayed bridge model, and calculate the reasonable cable force of the bridge (.2) the commonly used cable force control method in construction is discussed, and the reasonable construction control scheme is put forward. According to the actual construction situation of the bridge, the cable force adjustment method is studied deeply, and the cable force adjustment method based on the state difference is put forward, which does not consider the construction process. By comparing the bridge state before and after cable adjustment, the displacement of tower and beam caused by the change of cable force is obtained, and the adjustment method of cable force is obtained for the calculation of pulling out quantity of anchor cup at one time. The feasibility of the bridge is verified by theoretical and formula derivation. 4) several methods of cable force measurement in construction are introduced, and the specific methods of measuring the cable force of the bridge by frequency method are explained in detail.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U448.27;U445.4
本文编号：2141251
[Abstract]:Cable-stayed bridge is a kind of cable system bridge, and is one of the main bridge types of long span bridge structure. Modern cable-stayed bridge, with its great span ability, aesthetic value and reasonable force system, has become a great favor in modern bridge construction project in less than a hundred years. At the end of 1980s, Nanpu Bridge in Shanghai was built in China. Once it crossed the river, it was 423 meters long. It was the first cable-stayed bridge with 400 meters span in our country. Today, the number of cable-stayed bridges over 400 meters in China is 59, more than half of the global total, ranking first in the world. Cable-stayed bridge has many advantages, the main characteristic of which is that the stress of the whole bridge system can be changed by changing the cable-stayed cable force. The cable provides elastic support for the main beam, and the cable force can be adjusted according to the demand. For this reason, the cable tension of cable-stayed bridge is very important, both in the design stage and in the construction stage, must carry on the accurate calculation, the accurate measurement and the reasonable adjustment. Based on the actual construction of cable-stayed bridge by a landing support method, this paper studies the cable of the bridge, the concrete work content mainly includes: 1) summarizes several calculation methods of rational cable force of cable-stayed bridge. Using the finite element analysis software to establish the cable stayed bridge model, and calculate the reasonable cable force of the bridge (.2) the commonly used cable force control method in construction is discussed, and the reasonable construction control scheme is put forward. According to the actual construction situation of the bridge, the cable force adjustment method is studied deeply, and the cable force adjustment method based on the state difference is put forward, which does not consider the construction process. By comparing the bridge state before and after cable adjustment, the displacement of tower and beam caused by the change of cable force is obtained, and the adjustment method of cable force is obtained for the calculation of pulling out quantity of anchor cup at one time. The feasibility of the bridge is verified by theoretical and formula derivation. 4) several methods of cable force measurement in construction are introduced, and the specific methods of measuring the cable force of the bridge by frequency method are explained in detail.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U448.27;U445.4
【参考文献】
相关期刊论文 前2条
1 梁志广,李建中,石现峰;斜拉桥施工初始索力的确定[J];工程力学;2000年03期
2 李冬;朱巍志;张哲;;双套拱塔斜拉桥索力张拉优化及控制[J];桥梁建设;2012年04期
相关硕士学位论文 前1条
1 伏首圣;公和斜拉桥索力的确定与调整[D];大连理工大学;2003年
，本文编号：2141251
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