新型墙板内置无粘结支撑钢框架体系抗震性能研究

发布时间：2018-01-06 14:20

本文关键词：新型墙板内置无粘结支撑钢框架体系抗震性能研究　出处：《哈尔滨工业大学》2014年硕士论文　论文类型：学位论文

【摘要】：墙板内置无粘结钢板支撑（panel BRB）是一种以外部墙板为约束构件的防屈曲支撑（BRB）。外部墙板与内置支撑之间敷设无粘结材料或留置间隙，内置钢板支撑用于抵抗支撑所承担的全部楼层剪力，外部墙板不用于抵抗楼层剪力，仅用于约束内置支撑，防止内置支撑在受压时发生大幅整体和局部屈曲，使支撑在轴向拉压作用下都能进入屈服，支撑钢材的受压承载力和耗能能力得到充分利用。在有抗震要求且需要较多隔墙的建筑中，可使用墙板内置支撑作为抗侧力构件，外部墙板兼做隔墙，具有良好的应用前景。目前，相比于杆式防屈曲支撑，对墙板内置支撑以及采用墙板内置支撑抗侧力的中心支撑钢框架结构的抗震性能的研究相对较少。针对目前研究中的不足，本文主要对3个两层一跨的墙板内置支撑钢框架体系进行了拟静力试验，并对10层和30层的墙板内置支撑钢框架结构算例进行了抗震分析，考察了结构的抗震性能，并提出了该种结构体系的抗震设计方法和建议。为避免钢筋混凝土墙板内置支撑中墙板的受弯开裂和冲切破坏，本试验采用两种性能较好的墙板来制作墙板内置支撑。其一，采用闭口型压型钢板-混凝土组合墙板。组合墙板中的压型钢板代替普通钢筋混凝土墙板中的钢筋，能够更好地承受拉力，提高墙板的抗弯承载力和延性；内置开孔槽钢与混凝土的组合作用可以提高墙板的抗冲切承载力。其二、通过高强螺栓和自攻螺钉等连接双层墙板骨架形成的轻质组装墙板。主要通过焊接在约束钢板外侧的厚壁矩形钢管对支撑提供约束作用，这种墙板在降低自重的同时还简化了制作工艺与安装流程，便于精确控制支撑与墙板的间隙以及支撑的初弯曲，拥有更高的可靠性。通过对墙板内置单斜支撑刚接框架、墙板内置人字形支撑铰接框架和墙板内置人字形支撑刚接框架的拟静力试验研究，考察了支撑布置形式、墙板形式、支撑与框架的连接形式和梁柱节点的连接形式对墙板内置支撑钢框架滞回性能的影响。试验结果表明，相同层高与跨度内，，与单斜支撑相比，人字形支撑拥有更高的抗侧刚度；与闭口型压型钢板-混凝土组合墙板相比，轻钢组装墙板拥有更简单的制作流程和对内置支撑更可靠的侧向约束能力，且能重复利用；与节点区钢柱直接焊接的支撑，传力路径明确，能有效的降低梁端的内力，简化了节点设计；相同侧移下，人字形支撑铰接框架比人字形支撑刚接框架拥有更小的结构内力，整个加载过程中钢梁和柱子并无明显破坏。应用ANSYS程序，考虑材料和几何非线性，对3个墙板内置支撑钢框架的滞回性能进行了数值模拟，探讨了墙板内置支撑钢框架的简化模拟方法，考察了结构顶层水平往复位移加载时支撑与钢框架的受力状态和相互作用，并将结构顶层的荷载-侧移滞回曲线与试验所得的滞回曲线进行对比。结果吻合较好，证明了简化模拟方法的可行性，可为该种支撑钢框架结构弹塑性抗震分析提供参考。应用ANSYS程序，考虑材料和几何非线性，对5个10层和3个30层的支撑跨钢梁和柱子铰接的墙板内置人字形支撑钢框架结构进行了弹塑性时程分析。结果表明，在10层的结构中，多遇地震下所有结构都满足层间侧移角限值的要求；在罕遇地震下，所有结构层间侧移角均满足限值要求，除了钢梁和柱子均铰接的结构，其余结构都满足层间残余变形限值的要求。在30层的结构中，多遇地震下，3个结构的层间侧移均能满足要求；在罕遇地震下，3个结构的层间侧移角都不超过规范限值。总体上，按双重抗侧力体系设计的结构能满足层间残余变形限值的要求。对墙板内置支撑钢框架体系的抗震分析表明，随着钢框架的调整加强，结构的层间侧移和残余变形减小，但是用钢量增大。综合考虑钢结构节点的制作成本和用钢量，建议在中低层建筑中可不按双重体系进行设计，但需要采用非支撑跨梁柱刚接的支撑钢框架结构体系；在高层建筑和对层间侧移限制严格的建筑中，宜按照双重抗侧力体系对框架进行调整加强，即删掉支撑后的框架仍能独立承担25%的基底剪力，此25%的基底剪力可以以侧向分布力或顶部集中力的形式施加于需调整加强的框架上。
[Abstract]:The built - in non - adhesive steel plate support ( panel BRB ) is an anti - buckling support ( BRB ) with an external wall panel as a binding member . A built - in steel plate supports a non - adhesive material or a retention gap between the external wall panel and the built - in support . The built - in steel plate supports the built - in support to resist the floor shearing force . The built - in support is used for restraining the built - in support , so that the built - in support can enter the yield under the action of axial tension , so that the built - in support can be used as an anti - side force component , and the external wallboard can be used as a partition wall , and has good application prospect . At present , compared with the rod - type buckling - proof support , the research on the anti - seismic performance of the built - in support of the wallboard and the center - supported steel frame structure with the built - in support anti - side force of the wallboard is relatively few . According to the defects in the current research , the paper mainly studies the quasi - static test of the built - in support steel frame system of the three layers of the wall panel , and analyzes the anti - seismic performance of the built - in support steel frame structure of the 10 - layer and 30 - layer wallboard . The seismic performance of the structure is investigated , and the anti - seismic design method and the proposal of the structural system are proposed . In order to avoid the bending cracking and punching failure of the wallboard in the built - in support of the reinforced concrete wallboard , two kinds of wall boards with better performance are used to manufacture the built - in support of the wallboard . The experimental results show that compared with single - inclined support , it has higher anti - side rigidity than single - diagonal bracing , and it can effectively reduce the internal force of the beam end , simplify the node design , and can effectively reduce the internal force of the beam end , and can effectively reduce the internal force of the beam end . The hysteretic behavior of the built - in support steel frame in three wallboard is simulated numerically by using ANSYS program . The simplified simulation method of the built - in support steel frame in the wallboard is discussed . The stress state and interaction between the support and the steel frame during the horizontal reciprocating displacement loading on the top level of the structure are discussed , and the load - side shift hysteresis curve of the top layer of the structure is compared with the hysteresis curve obtained by the test . The results agree well , and the feasibility of the simplified simulation method is proved . Based on ANSYS program , considering material and geometric nonlinearity , elastic - plastic time history analysis of the built - in herringbone support steel frame structure of five 10 - layer and three 30 - layer supporting span steel beams and columns is carried out . The results show that all the structures in the structure of 10 layers meet the requirements of the limit of inter - layer residual deformation . In the structure of 30 layers , the inter - layer lateral shift angle of three structures can meet the requirements . In general , the structure designed by the double - side force system can meet the requirement of the limit of residual deformation between layers . The seismic analysis of steel frame system with built - in support steel in the wallboard shows that with the adjustment of steel frame , the inter - layer side - shift and residual deformation of the structure are reduced , but the steel quantity is increased . Considering the manufacturing cost and the steel quantity of the steel structure node , it is suggested that the frame should be adjusted according to the double anti - lateral force system .

【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU391

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