典型桥墩大跨梁桥施工全过程抗震性能综合决策  

A Comprehensive Decision on Seismic Performance of Long Span Girder Bridges with Typical Piers for Whole Construction Process

作　　者：郑玉国[1] 宋英梁 夏鸿翔 ZHENG Yuguo;SONG Yingliang;XIA Hongxiang(School of Civil Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]湖南科技大学土木工程学院,湖南湘潭411201

出　　处：《防灾减灾工程学报》2020年第1期139-144,共6页Journal of Disaster Prevention and Mitigation Engineering

基　　金：国家重点基础研究发展计划项目(973计划,2015CB057702);湖南省自然科学基金项目(14JJ3109)资助。

摘　　要：在满足永久状态桥梁抗震设计要求的前提下,针对典型桥墩大跨梁桥施工全过程抗震设计的难题,通过综合考虑施工全过程抗震设计中的各种关键因素,联合应用能力需求比法和层次分析法,建立施工全过程抗震性能综合决策的框架。然后提出合理的决策策略,定量决策出典型桥墩大跨梁桥施工全过程综合性能最优的抗震设计方案。研究结果表明,在施工全过程的抗震能力满足要求的条件下,典型桥墩大跨梁桥:花瓶形实体桥墩连续梁桥、矩形空心薄壁桥墩连续梁桥、双柱实体桥墩连续梁桥施工全过程综合抗震性能的权重之比为0.340∶0.327∶0.333。花瓶形实体桥墩连续梁桥施工全过程综合抗震性能为最优。所提出的方法和建立的框架,可以广泛应用于各类桥梁施工全过程抗震设计及抗震性能综合决策。This study focuses on the seismic design difficulties of long span girder bridges with typical piers of the whole construction process.The capacity/demand method and the analytic hierarchy process were combined to establish a set of comprehensive decision frame for the synthetic decision on their seismic performance of the whole construction process by considering all essential factors in the design under the condition that their seismic design requirements of the permanent state were met.Then rational decision strategies were presented to decide the optimal seismic design scheme in the bridges quantitatively in terms of the comprehensive seismic performance of the whole construction process.The results show that the weight ratio of the bridges with typical piers,the vase-type-solidpier continuous girder bridge,the rectangle-hollow-thin-wall-pier,and the double-column-solid-pier is0.340:0.327:0.333 when their earthquake resistance in the whole construction process is satisfied.Namely,the vase-type-solid-pier bridge has the optimal comprehensive seismic performance of the whole construction process.The proposed method and frame can be extended to seismic design and comprehensive decision on seismic performance of other kinds of bridges of the whole construction process.

关 键 词：典型桥墩大跨梁桥 施工全过程 能力需求比法 层次分析法 抗震设计 综合决策 

分 类 号：U442.5[建筑科学—桥梁与隧道工程] U448.21[交通运输工程—道路与铁道工程]