通过对美国规范ASCE/SEI 7《Minimum Design Loads for Buildings and Other Structures》中抗震结构体系(SFRS)和地震设计动参数的取值、ACI 318《Building Code Requirements for Structural Concrete and Commentary》和ANSI/AISC 34...通过对美国规范ASCE/SEI 7《Minimum Design Loads for Buildings and Other Structures》中抗震结构体系(SFRS)和地震设计动参数的取值、ACI 318《Building Code Requirements for Structural Concrete and Commentary》和ANSI/AISC 341《Seismic Provisions for Structural Steel Buildings》对钢筋混凝土结构和钢结构抗震体系中抗震措施具体要求的分析,表明延性设计和"高延性-低弹性承载力"或"低延性-高弹性承载力"都是美国抗震设计的基本思路。设计选择何种抗震结构体系,关系着结构承受地震作用的大小、抗震措施的复杂难易以及工程造价。简述了ASCE/SEI 7结构体系地震动参数的取值,并与中国规范在地震作用、混合结构方面作简要对比。展开更多
Tornadoes can destroy or severely damage physical infrastructure including buildings in a community.This can result in direct losses but also indirect losses such as the closure of key social institutions reverberatin...Tornadoes can destroy or severely damage physical infrastructure including buildings in a community.This can result in direct losses but also indirect losses such as the closure of key social institutions reverberating further through the community(e.g.,schools).Despite significant losses in past events,building codes and standards have not previously included tornado hazards because of the relatively low probability of a direct strike.The recent release of the ASCE 7-22 standard considers tornadoes for Risk Category 3 and 4 buildings,i.e.ranging from schools to critical facilities.This study proposes a series of design combinations of a reinforced masonry school building with different performance targets intended to enable schools to reopen sooner.Tornado fragilities were developed for a school building having improved designs using tornado loads determined based on the new tornado chapter in ASCE 7-22,and then integrated into a community level model with school attendance zones to examine the effect.The ultimate goal in this study is to investigate the effect of improving school building designs would have on maintaining school continuity(and more rapid return)for school children.展开更多
文摘通过对美国规范ASCE/SEI 7《Minimum Design Loads for Buildings and Other Structures》中抗震结构体系(SFRS)和地震设计动参数的取值、ACI 318《Building Code Requirements for Structural Concrete and Commentary》和ANSI/AISC 341《Seismic Provisions for Structural Steel Buildings》对钢筋混凝土结构和钢结构抗震体系中抗震措施具体要求的分析,表明延性设计和"高延性-低弹性承载力"或"低延性-高弹性承载力"都是美国抗震设计的基本思路。设计选择何种抗震结构体系,关系着结构承受地震作用的大小、抗震措施的复杂难易以及工程造价。简述了ASCE/SEI 7结构体系地震动参数的取值,并与中国规范在地震作用、混合结构方面作简要对比。
基金The Center for Risk-Based Community Resilience Planning is a NIST-funded Center of Excellencethe Center is funded through a cooper-ative agreement between the U.S.National Institute of Standards and Technology and Colorado State University(NIST Financial Assistance Award Numbers:70NANB15H044 and 70NANB20H008).
文摘Tornadoes can destroy or severely damage physical infrastructure including buildings in a community.This can result in direct losses but also indirect losses such as the closure of key social institutions reverberating further through the community(e.g.,schools).Despite significant losses in past events,building codes and standards have not previously included tornado hazards because of the relatively low probability of a direct strike.The recent release of the ASCE 7-22 standard considers tornadoes for Risk Category 3 and 4 buildings,i.e.ranging from schools to critical facilities.This study proposes a series of design combinations of a reinforced masonry school building with different performance targets intended to enable schools to reopen sooner.Tornado fragilities were developed for a school building having improved designs using tornado loads determined based on the new tornado chapter in ASCE 7-22,and then integrated into a community level model with school attendance zones to examine the effect.The ultimate goal in this study is to investigate the effect of improving school building designs would have on maintaining school continuity(and more rapid return)for school children.
