Chapter 7 7.1 Introduction 7.er Wenchua Earthquake Seismic Design of Masonry Buildings 7.5 Details 7.Intrednction Multi-sory mo ry bu multi-story buildings with inner frames 7.1 Introduction 7.1.I Multi-story masonry buildings
Chapter 7 Seismic Design of Masonry Buildings Chapter 7: Seismic Design of Masonry Buildings 7.1 Introduction 7.2 Considerations after Wenchuan Earthquake 7.3 Design criteria 7.4 Essentials in calculation of masonry buildings 7.5 Details 7.1 Introduction n Multi-story masonry structures are still the major type in the vast areas of China and other developing countries n Masonry structures in china mainly include u multi-story masonry buildings u multi-story buildings with framed first one/two stories u multi-story buildings with inner frames u Multi-story masonry buildings Vertical bearing elements: Masonry walls; Floors and Roof: reinforcing-concrete in site, prefabricated pre-stressed concrete slabs, timber joist and panels Steel truss or timber truss ? 7.1 Introduction 7.1.1 Multi-story masonry buildings 7.1 Introduction 7.1.1 Multi-story masonry buildings
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7.1 Introduction : Multi-story masonry buildings 7.1 Introduction : Multi-story masonry buildings u Multi-story masonry buildings with framed first one/two stories Masonry structure are used for the upper stories, and reinforced concrete frame with masonry walls are applied in the lower first one/two stories. 7.1 Introduction : 7.1.2 Multi-story masonry buildings with framed first one/two stories （with dual system） 7.1 Introduction : 7.1.2 Multi-story buildings with framed first one/two stories 7.1 Introduction : Multi-story buildings with framed first one/two stories
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u Multi-story masonry buildings with inner frames Masonry walls and columns are adopted in exterior bearing walls and multi-row columns are employed for interior bearing system. 7.1 Introduction : multi-story masonry buildings with inner frames u Multi-story buildings with inner frames Masonry walls and columns are adopted in exterior bearing walls and multirow columns are employed for interior bearing system. 7.1 Introduction : 7.1.3 Multi-story buildings with inner frames n 7.1 Introduction : 7.1.4 Special Masonry buildings —— Church 7.1 Introduction : Old Church
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7.1 Introduction 7.1.4 modern masonry （with dual material） n Ductile design n to have masonry structures in high seismic areas designed capable of considerable inelastic behavior without a failure. n Confined masonry and/or reinforced masonry n consist of reinforced-concrete or reinforced-masonry elements such as constructional columns, core columns and ring beams etc., which confine the masonry walls along the edges n steel reinforcement n placed either in the joints and pockets between the units and embedded in the mortar, or in especially provided holes and channels within the units and grouted with concrete or grout n reinforced hollow unit masonry n horizontal reinforcement placed in the bed joints carries the shear n vertical reinforcement subjected lateral loads n truss mechanism in the wall, the tension components of bending and shear forces due to lateral load are carried by steel, and the compression components are carried by the masonry units 7.1 Introduction 7.1.4 modern masonry n Building’s Collapse n Diagonal Crakes of masonry walls n Failure of connection with walls n Floor collapse n Damages of Building’s corners n Damages of staircase rooms n Damages of Non-structural elements 7.2 Considerations after Wenchuan Earthquake Building’s Collapse Building’s Collapse Diagonal Crakes of masonry walls
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Diagonal Crakes of masonry walls Diagonal Crakes of masonry walls Diagonal Crakes of masonry walls Diagonal Crakes of masonry walls Floor collapses For Comparison