钢筋混凝土框架结构房屋的震害预测

以薄弱楼层的层间屈服强度系数为判定指标，应用矩阵位移法的计算结果对钢筋混凝土框架结构房屋进行震害预测。     

钢筋混凝土框架结构房屋震害预测软件设计思路

为方便、快捷地开展钢筋混凝土框架结构房屋单体震害预测，应用Fortran程序语言，对以薄弱楼层层间屈服强度系数作为判定指标的震害预测方法编写了钢筋混凝土框架结构房屋震害预测计算程序，并采用Visual Basic 6．0语言设计了用户界面。     

基于GIS技术的钢筋混凝土框架结构震害预测系统设计

根据传统的钢筋混凝土框架结构震害预测方法，利用地理信息系统软件ArcView，研制了一套钢筋混凝土框架结构震害预测与评价系统。这一预测系统不仅适用于钢筋混凝土框架结构，而且适用于底层框架和内框架结构。     

钢筋混凝土高烟囱的震害预测方法

本文提出钢筋混凝土高烟囱的一个震害预测方法，用钢筋混凝土弯曲构件的延性指数作为破坏指标。烟囱的内力考虑了水平地震弯矩、竖向地震轴力和自重轴力以及ｐ－Δ效应引起的地震附加弯矩。烟囱的抗力由归一化的极限弯曲应力和极限轴向应力的包线确定。     

耗能支撑钢筋混凝土框架结构抗震性能研究

本文通过普通钢筋混凝土框架、耗能支撑钢筋混凝土框架结构１／８比例模型的地震模拟振动台对比试验,研究两类框架结构在地震作用下的破坏形态和动力特征,揭示了耗能支撑钢筋混凝土框架结构良好的抗震性能;对试验模型进行了弹塑性时程分析,理论分析和试验结果符合较好;结合扬州电厂二期主厂房框排架结构,研究了其纵向框架结构采用耗能支撑体系时结构的抗震性能,为该类结构型式的工程应用提供依据     

耗以支撑钢筋混凝土框架结构抗震性能研究

本文通过普通钢筋混凝土框架、耗能支撑钢筋混凝土框架结构１／８比例模型的地震模拟震动台对比试验,研究两类框架结构在地震作用下的破坏形态和动力特征,揭示了耗能支撑钢筋混凝土框架结构良好的抗震性能;以试验模型进行了弹塑性时程分析,理论分析和试验结果符合较好;结合场州电厂二期主厂房框架结构,研究了其纵向框架结构采用耗能支撑体系时结构的抗震性能,为该类结构形式的工程应用提供依据。     

考虑模糊因素的框架结构震害预测方法

通过二次评判法,在考虑框架结构强度、变形破坏准则的基础上,引入了房屋破损程度、施工质量等模糊因素,使框架结构的震害预测建立在既考虑可精确计量的强度、变形等因素,又考虑了诸多无法精确计量的模糊因素基础上,从而复原了震害预测的本质即概率和模糊的特性。     

矩形钢筋混凝土蓄水池震害预测方法及分析程序简介

本给出了一种矩形有疬钢筋混凝土蓄水池的震害预测方法和计算分析程序，并对两蓄水池进行了震害预测分析，得出震害经验相符合的结论－地下式水池比地上水池的抗震能力强，从而证明了本方法的实用性。     

钢筋砼磨擦耗能支撑框架结构的单元刚度和力学模型分析

为研究钢筋砼磨擦耗能支撑框架结构的动力反应性能，对其中的磨擦耗能器单元和框加杆单元的单元刚度和力学模型做了分析。钢筋砼磨擦耗能支撑单元由支撑杆单元和钢板－橡胶磨擦耗能器单元组成，支撑单元可取空间杆单元，磨擦耗能器单元为平面应力矩形单元。磨擦耗能器单元的剪切恢复力曲线为理想的弹塑性曲线，根据耗能器单元的力学模型，可确定其在每一时刻的刚度；框架结构空间杆单元的恢复力模型采用双线型模型，根据杆单元的力学模型，可确定其在每一时刻的刚度。并利用所编制的程序对十层单榀两跨空间普通框架和摩擦耗能支持框架在地震作用下进行了弹塑性反应时程分析，结果表明耗能支撑框架的顶层最大位移明显小于普通框架。     

东莞市区矩形钢筋混凝土水池震害预测

介绍了钢筋混凝土水池在地震灾害预测工作中的意义,根据前人提出的钢筋混凝土水池震害预测方法[1],对东莞市的水池进行了震害预测,认为东莞市即使在相当于9度烈度地震作用下,所有水池均处于轻微破坏以下,抗震性能良好.最后提出水池抗震设计方面应注意的一些问题.     

Experimental study on the seismic response of braced reinforced concrete frame with irregular columns

A 15-storey K-braced reinforced concrete model frame with irregular columns, i.e., T-shaped, L-shaped, as well as +-shaped columns, was constructed and tested on the six-degree-of-freedom shaking table at the State Key Laboratory for Disaster Reduction in Civil Engineering in Tongji, China. Two types of earthquake records, El-Centro wave (south-north direction) and Shanghai artificial wave (SHAW) with various peak accelerations and principal-secondary sequences, were input and experimentally studied. Based on the shaking table tests and theoretical analysis, several observations can be made. The failure sequence of the model structure is brace→beam→column→joints, so that the design philosophy for several lines of defense has been achieved. Earthquake waves with different spectrums not only influence the magnitude and distribution of the earthquake force and the storey shear force, but also obviously affect the magnitude of the displacement response. The aftershock seismic response of previously damaged reinforced concrete braced frames with irregular columns possesses the equivalent elastic performance characteristic. Generally speaking, from the aspects of failure features and drift ratio, this type of reinforced concrete structure provides adequate earthquake resistance and can be promoted for use in China.     

消能支撑框架结构的非线性分析

本文介绍了六榀钢筋混凝土支撑框架模型（两榀为普通支撑框架，另四榀为消能支撑框架）在低周反复荷载作用下的工作性能和试验结果；编制了非线性程序，对试验模型进行了计算分析，计算结果和试验实测值符合较好；另外还计算了两榀足尺消能支撑框架结构，研究不同的消能器滑移荷载对结构抗震能力的影响，结果表明消能支撑框架结构具有良好、稳定的抗震性能。     

钢筋混凝土框架柱震损程度量化鉴定方法

钢筋混凝土结构震后损伤鉴定中,最常见的方式是鉴定者观察房屋破坏现象,根据经验给出震损等级。该方法直观高效,但对鉴定者的专业经验要求较高,且鉴定结果的主观差异较大。对此以RC框架柱为对象,开展了基于震损现象的震损量化鉴定方法研究:在RC框架柱震损现象量化试验基础上给出基于构件骨架曲线特征阶段的震损分级方法;对7个RC框架柱试件进行了改进Park-Ang损伤指数分析,建立了RC框架柱损伤指数-震损分级-震损现象的对应关系;基于RC框架柱的试验结果及典型震害编制了RC框架柱震损图集,并给出了使用图集进行框架柱震损鉴定的流程及方法。使用该方法对2个实际震害中的RC框架柱进行了震损鉴定,可为更加客观以及准确地开展钢筋混凝土结构的震损鉴定提供参考。     

砖墙-钢筋混凝土墙组合结构震害预测方法

建筑物震害预测对于制定城市防震减灾规划意义重大,对于我国高烈度区建造的砖墙-钢筋混凝土剪力墙组合结构,目前没有成熟的震害预测方法.为了预测西昌市砖墙-钢筋混凝土剪力墙组合结构建筑物在不同地震烈度下可能发生的震害程度,通过分析该种结构在不同地震作用下的受力特点,提出以结构薄弱层的楼层屈服强度系数为指标进行震害预测,并结合...     

建筑物震害预测模糊震害指数法

建筑物震害预测是城市防震减灾的基础工作之一。本文在分析现有震害预测方法的基础上，提出了一种新的震害预测方法－模糊震害指数法。模糊震害指数法以现有震害预测资料为基础，采用模糊数学方法实现。本文详细阐述了模糊震害指数法的理论模型，推导了其数学公式，最后给出了实例分析。     

高强混凝土框架柱的地震损伤模型

本文首先讨论了现有的几种地震损伤模型及其特点,然后计算出试验框架柱累积滞回耗能随加载循环水平的变化,分析和讨论了轴压比、箍筋形式、配箍率、纵向配筋率、混凝土强度等级以及剪跨比对累积滞回耗能的影响。根据现有的损伤模型,对试验框架柱的损伤指数进行了分析比较,给出了符合高强混凝土框架柱和普通混凝土框架柱的地震损伤模型。根据损伤指数随加载循环水平的变化规律,分析和讨论了剪跨比、轴压比以及配箍率对损伤的影响。最后通过对各地震损伤模型的比较分析,提出了高强混凝土框架柱的地震损伤模型。     

基于剩余寿命等效的钢筋混凝土构件地震损伤模型

基于剩余寿命等效的概念，提出了钢筋混凝土构件地震损伤改进模型。其基本思想是认为以某损伤参数(如刚度、位移延性、能量等)建构的损伤指数与疲劳损伤指数(如纵筋累积疲劳损伤)，在损伤指数D＝1．0条件下都可以表示构件失效。这样在某时刻以不同损伤指数表达的构件剩余寿命(1．0—Di)与损伤指数增量ΔDi之比，都等于使构件完全失效时对应的继续循环加载周数。利用这种等效关系定义了新的损伤指数，可以在构件的反应参量和破坏机理之间建立起联系。作为实际应用给出了一种基于截面刚度退化的低周反复荷载作用下钢筋混凝土桥墩损伤模型。     

Tests on cyclic behavior of reinforced concrete frames with brick infill

This paper reports the results of cyclic loading tests performed on four specimens consisting of reinforced concrete frames with brick infill walls. The brick infill is pre‐laid, followed by the cast in‐place RC columns and beams. Test parameters include the height‐to‐length ratio of the brick infill wall and the mortar compressive strength. Test results reveal that the in‐plane lateral strength of brick infill wall is related to the fracture path. The fracture path for brick infill walls with large height‐to‐length ratios includes bed joints, cross joints, and vertical splitting of bricks. As a result, the lateral strength of this type of brick infill wall is larger. In comparison, the fracture path for brick infill walls with small height‐to‐length ratios only passes through joints, which is the reason why they have lower lateral strength. Mortar with higher strength improves the lateral strength of brick infill wall. In addition to presenting experimental observations in detail, this paper compares the test results with those obtained from existing methods for assessment of seismic resistance. Comments and recommendations are offered with respect to the capabilities of the assessment methods in predicting stiffness, strength, and ultimate deformation capacity of brick infill walls. Copyright © 2015 John Wiley & Sons, Ltd.     

Subassemblage cyclic loading test of RC frame with buckling restrained braces in zigzag configuration

A new buckling restrained braced frame system is proposed for reinforced concrete building structures, which is featured by the zigzag configuration of the braces and the corresponding connection details. The connection details tend to separate the vertical and horizontal components of force imposed by the braces to be resisted by independent structural components to make the behavior of the connection easier to estimate and control. The performance of the brace connection details was evaluated through cyclic load testing on 1/2‐scale subassemblies of the proposed system, each of which consisted of a reinforced concrete part and a set of buckling restrained braces. To simplify the test control, the specimens were rotated 90° in the test and were loaded by two displacement controlled actuators. The test results show that the normal and the shear resistance of the gusset plate connection are essentially independent of each other. However, the rotation of the gusset plate with respect to the beam‐to‐column joint may result in nonuniform force distribution of the anchor bolts, the primary resistance for tensile force. At the same time, such rotation may also subject the concrete corbels, the primary shear resistance, to unfavorable tensile force. In addition, it is also confirmed that the buckling restrained braces performed well in the proposed system. Copyright © 2012 John Wiley & Sons, Ltd.